Mcintosh C55 User guide

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Page 1

McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.com

AUDIO PREAMPLIFIER

OWNER’S MANUAL

Page 2

Thank You from all of us at McIntosh

Table of Contents

Trademark and License Information

You have invested in a precision instrument that will provide you with many years of enjoyment. Please take a few moments to familiarize yourself with the features and instructions to get the maximum performance from your equipment.

If you need further technical assistance, please contact your dealer who may be more familiar with your particular setup including other brands. You can also contact McIntosh with additional questions or in the unlikely event of needing service.

McIntosh Laboratory, Inc.

2 Chambers Street Binghamton, New York 13903

Technical Assistance (607) 723-3512 Fax (607) 724-0549

Customer Service (607) 723-3515 Fax (607) 723-1917

Email [email protected] Website www.mcintoshlabs.com

Please Take A Moment

For future reference, you can write down your serial number and purchase information here. We can identify your purchase from this information if the occasion should arise:

General Information .. .. .. .. .. .. .. .. .. .. 3

Connector and Cable Information.. .. .. .. .. 3

Performance Features .. .. .. .. .. .. .. .. .. .. 4

Dimensions .. .. .. .. .. .. .. .. .. .. .. .. .. .. 5

Installation .. .. .. .. .. .. .. .. .. .. .. .. .. .. 5

Front Panel Knobs and Buttons.. .. .. .. .. .. 6

Inputs .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 7

Outputs.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 7

How to use the Remote Control .. .. .. .. .. .. 9

Setup Menus . .. .. .. .. .. .. .. .. .. .. .. .. ..10

Digital Setup Menu .. .. .. .. .. .. .. .. .. .12-13

Inputs Setup Menu .. .. .. .. .. .. .. .. .. .. ..13

Outputs Setup Menu .. .. .. .. .. .. .. .. .. .. 14

Triggers Setup Menu .. .. .. .. .. .. .. .. .. ..15

Data Out Setup Menu .. .. .. .. .. .. .. .. .. ..15

External Control Setup Menu. .. .. .. .. .. ..16

System Configurations .. .. .. .. .. .. .. .. .. 17

Connecting Components.. .. .. .. .. .. .. .. .. 17

Network Information Menu .. .. .. .. .. .. ..18

Trim Functions Menu .. .. .. .. .. .. .. .. .18 -19

Equalizer Controls .. .. .. .. .. .. .. .. .. .. ..19

How to Operate the C55 .. .. .. .. .. .. .. 20-21

Specifications .. .. .. .. .. .. .. .. .. .. .. .. ..22

Packing Instructions .. .. .. .. .. .. .. .. .. ..23

Parts List .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..23

The McIntosh C55 incorporates copyright protected technology that is protected by U.S. patents and other intellectual property rights. The C55 uses the following technologies:

Trademark License Information

ASIO is a trademark and software of Steinberg Media Technologies GmbH

Manufactured under license from Dolby Laboratories. Dolby, Dolby Audio, and the double-D symbol are trademarks of Dolby Laboratories.

For DTS patents, see http://patents. dts.com. Manufactured under license from DTS, Inc. DTS, the Symbol, DTS and the Symbol together, and Digital Sur round are registered trademarks and/ or trademarks of DTS, Inc. in the United States and/or other countries. DTS, Inc. All Rights Reserved.

The terms HDMI, HDMI

High-Denition Multimedia

Interface, and the HDMI Logo

HIGH-DEFINITION MULTIMEDIA INTERFACE

are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.

Serial Number: __________________________

Purchase Date: ___________________________

Dealer Name: ___________________________

Safety First

Please read the safety instructions included in a separate document called Important Additional Operation Information Guide.

Page 3

PIN 3

General Information

Ground

C55

Connector and Cable Information

1. Do not apply AC Power to the C55 and other Component(s) until they are connected to the C55 so operational malfunctioning does not occur.

2. Balanced and Unbalanced Inputs and Outputs can be mixed. For example, you may connect signal sources to Unbalanced Inputs and send signals from the Balanced Outputs. You can also use Balanced and Unbalanced Outputs simultaneously, connected to different Power

Ampliers.

3. The C55 internal Digital to Analog Converter Circuitry is designed to decode PCM, DSD and DTS Digital Signals. The Coaxial and Optical Digital Audio Inputs are for PCM Digital Signals, Dolby Signals and DTS Signals. The C55 also decodes USB and HDMI (ARC) Digital Signals. Other Digital Audio Signal Format Types will cause the Audio Outputs of the C55 to be muted.

4. The McIntosh C55 is factory congured for immediate use. It can also be customized to complement the components making up your system. Refer to the Setup Menu described on page 11.

5. The Remote Control Supplied with the C55

Preamplier is capable of operating other

components. For additional information go to www.mcintoshlabs.com.

6. The IR Input is congured for non-McIntosh

IR sensors such as a Xantech Model HL85BK Kit. Use a Connection Block such as a Xantech

Model ZC21 when two or more IR sensors need to be connected to the C55. The signal from a connected External IR Sensor will have priority over the signal from the Front Panel IR Sensor.

7. For additional information on the C55 and other McIntosh Products please visit the McIntosh website at www.mcintoshlabs.com.

Introduction

The McIntosh C55 Audio Preamplier is one of the nest Preampliers ever created with connec

tions for both analog and digital sources. The C55 Outputs have the ability to drive multiple Power

Ampliers. The C55 reproduction is sonically

transparent and absolutely accurate. The McIntosh Sound is “The Sound of the Music Itself.”

XLR Connectors

Pin conguration for the XLR Balanced Input

and Output Connector. Refer to the diagrams for connections:

PIN 1: Shield/Ground PIN 2: + Input/Output

PIN 3: - Input/Output

PIN 2 PIN 1

PIN 1

PIN 2

Power Control and Trigger Connectors

The C55 Power Control Out, Trigger and Passthru Output Jacks send Power On/Off Signals (+12 volt/0 volt) when connected to other Components. An additional connec

tion is for controlling McIntosh Power Ampliers

Output Meters. A 3.5mm stereo mini phone plug is used for connection to the Power Control (Trigger) and Passthru Output.

Note: The Six Foot Cables are available from the McIntosh Parts

Department. Part No. 170202.

Main, Triggers 1- 4

and Passthru

Power Control

Meter Illumination Control

Data Port Connectors

The C55 Data Out Ports send Remote Control Signals to Source Components. A 3.5mm stereo mini phone plug is used for connection.

Data Signal

N/C

Data Ground

IR IN Port Connectors

The IR IN Port also uses a 3.5mm stereo mini phone plug and allows the connection of other brand IR Receivers to the C55.

IR Data Control

N/C

RS232 Data Port Cable

The RS232-C Data Cable is a 3.5mm stereo mini phone plug used to connect to external third party controllers.

C55 TXD Out Data being transmitted

C55 RXD In Data being received

Ground

Page 4

Performance Features

• Electromagnetic Input Switching with Level Trim Adjustment

Digital Logic Circuits drive Electromagnetic Switches on all Inputs and operating functions for reliable, noiseless, distortion-free switching. The Analog Inputs can be matched in level, preventing abrupt changes in volume levels.

• Phono Inputs with Adjustable Gain

The C55 has two precision Phono Preamplier Circuits. They have the ability to be congured

for Moving Coil or Moving Magnet Cartridges. The close tolerance resistors and capacitors used in the RIAA Correction Equalization Circuitry

provide an extremely at frequency response.

• Selectable Phono Cartridge Loading

Adjustable Capacitance and Resistance Loading are available for both Moving Coil and Moving Magnet Phono Cartridges. Capacitance Loading is selectable from values of 50 picofarads to 400 picofarads. Resistance Loading is selectable from values of 25 ohms to 47,000 ohms.

• Digital Audio Inputs

The Digital Inputs decode PCM and DSD Signals from external sources. Coaxial, Optical and HDMI Inputs process Digital Signals up to 192kHz with 24-Bit resolution. The Digital MCT Input Circuitry directly decodes SACD/CD signals from an external Transport component. The USB Input for streaming audio

processes Digital Signals up to 384kHz with

32Bit resolution, decodes up to DSD512 Digital

Signals and DXD 24Bit with a sampling rate up to 384kHz.

• Balanced Inputs

The Balanced Inputs allow the connection of a source component using long cable lengths

without a loss in sound quality.

• Precision Tracking VOLUME Knob

Volume levels are controlled by a Precision Balanced Digitally Controlled Attenuator System with an Encoder Rotary Control. This assures a

0.1dB tracking accuracy between channels. There are 214 individual 0.5dB volume level steps with no noise as the volume level is changed.

• Variable Rate Volume and Balance Controls

The C55 Preamplier’s Volume and Balance

Control Circuitry provides an ideal rate of change with control rotation.

• Equalizer Controls

The eight Front Panel Equalizer Controls provide 12dB of boost or cut at their center frequencies. The C55 remembers the Equalizer Circuitry ON/ OFF Setting for each input.

• HXD® for Headphones

The C55 Headphone Crossfeed Director Circuitry

(HXD Headphone Listening. HXD

directionality component of the spatial sound stage normally heard with loudspeaker listening.

) improves the sound localization for

restores the

• Alphanumeric Fluorescent Display

The Front Panel Information Display indicates the Source Selection, Volume/Balance Levels and Setup Menu Selections. The display intensity is adjustable.

• Passthru Mode

The Automatic Passthru Mode allows the C55 to become part of a Home Theater Multichannel Sound System.

• Remote Control with External Sensor Input

The Remote Control provides control of the C55 operating functions and McIntosh Source Components connected to it. Enjoy your McIntosh System from another room in your home by connecting an external sensor.

• Power Control Output and Trigger Assignment

A Power Control connection for convenient

Turn-On of McIntosh Power Ampliers, Source

Components and Accessories is included. The Power Control Trigger Outputs may be assigned to activate when a given Input/Output is selected.

• Special Power Supply

Fully regulated Power Supplies and a special R-Core Power Transformer ensure stable, noisefree operation even though the power line varies.

• Glass Front Panel with LED Illumination

The famous McIntosh Glass Front Panel is evenly Illuminated by multiple extra long life Light Emitting Diodes (LEDs) arranged with a special orientation. The pristine beauty of the C55 will be retained for many years.

• Bi-Amp Outputs

Built-in Adjustable Highpass and Lowpass Outputs for bi-amping your speaker system.

HXD® is a registered trademark of McIntosh Laboratory, Inc.

Page 5

Dimensions

C55

Installation

The following dimensions can assist in determining the best location for your C55. There is additional information on the next page pertaining to installing the C55 into cabinets.

A Note on Placement:

It is important to keep your McIntosh unit out of direct sunlight and only use appropriate gentle cleaners because the Organic Anodize can become discolored over time.

While most products will maintain their classic dark features for their lifetime, some situations can accelerate discoloration. The most pervasive culprit is UV light, especially light directly from the sun, or high intensity spotlights. Even high intensity short-term exposure can result in discoloration.

Chemicals can also alter the nish of the Anodize. Aggressive cleaners will take their toll over time and actually etch away the Anodize nish.

17 ⁄”

44.5 cm

-30

-60

-40

-50

OUTPUT LEVEL IN dB

EQUALIZER

PUSH – INFO HOLD – N ET

-30

-20

-10

VOLUME

SETUP

DJUST

STANDBY ON

MUTE

RESET

7 ⁄”

18.1 cm

7 ⁄”

19.4 cm

14 ⁄”

36.8 cm

HEADPHONES

-60

-50

INPUT

-30

-20

-40

-10

OUTPUT LEVEL IN dB

25 5 0 100 200 400 1 k 2.5k 10k

PUSH - TRIM HOLD - SETUP

OUTPUT

1 2

C5 5 A UD IO P R EA M PL I FI E R

USB 35%

DSD256

The C55 should be installed upright on its four feet. Adequate ventilation is important and will aid in a long trouble-free life of the C55. You must ensure

proper airow by allowing at least 3 inches (7.6cm)

above the unit and 3 inches (7.6cm) for the front, rear and sides. Do not remove the feet to ensure

adequate airow beneath the C55. There must be

openings for cool air to enter (below) and warm air to escape (above) the C55.

MAIN / HIGH PASS OUTPUT 1 / LOW PASS

C55 P REA MP LI FIE R

McINTOSH LABORATORY, INC. BINGHAMTON, NY

HANDCRAFTED IN USA WITH US AND IMPORTED PARTS

1R 1L 2R 2L 3R 3L

120V 50/60Hz

75 WATTS

BAL R BAL L BAL R BAL L

BALANCED INPUTS PROCESSOR LOOP

POWER CONTROL

TRIG 3

TRIG 1

SERVICE

PORT

TRIG 2

TRIG 4

17 ⁄”

43.5 cm

INSIDE DIMENSION

OUTPUT 2 (SUBWOOFER)

UNBAL UNBAL UNBAL

EXTERNAL CONTROL DATA PORTS

MAIN

PASSTHRU

RETURN

IR IN

RS232

BAL R BAL L

UNBALANCED INPUTS

1 42

SEND

NETWORK

CONTROL / UPDATE

ONLY

13 ⁄”

33.7 cm

6 ⁄”

16.5 cm

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

SERIAL

USB AUDIO

HDMI (ARC)

SERIAL NUMBER

DIGITAL AUDIO INPUTS

MCT OPTICAL 2 OPTICAL 1

DA2 DIGITAL AUDIO MODULE

GND

6 ⁄”

16 cm

COAX 2

COAX 1

NUMBER

PHONO INPUTS

⁄”

4.9 cm

10 ⁄”

26.8 cm

Page 6

-50

-60

-30

-20

-40

OUTP UT LE VEL IN dB

-30

-20

-40

-10

C 55 A UD I O P R E A M PL I F I E R

-50

-60

-40

OUTP UT LE VEL IN dB

-10

INPU T

PUSH - TR IM HOLD - SE TUP

HEADP HONES

OUTPU T

1 2

Front Panel Knobs and Buttons

1. INPUT Knob is used to select a source for

listening and recording. The knob is also used for menu navigation.

2. IR Sensor receives commands from a Remote Control.

3. NETwork Status LED provides NET connection status.

4. VOLUME Knob allows adjustment of the listening level for both channels, Trim Mode Adjustments, and various SETUP Functions.

25 50 100 200 400 1k 2.5k 10k

USB 35%

DSD256

5. STAN DBY/ON Button with indicator switches the C55 ON or OFF (Standby) and resets the microprocessors.

6. MUTE Button mutes the audio from the loudspeakers and Headphones.

7. EQUALI ZER Button allows the user to select whether or not the equalizer circuit is engaged. In the Off mode, the front panel adjustment knobs are bypassed and the audio signal is unaltered. In the On mode, the audio signal can be adjusted via the front panel frequency knobs.

VOLU ME

PUSH – IN FO

HOL D – N ET

SETUP

EQUALIZER

MUTE

STANDBY ON

RESET

8. Eight Band Equalizer Knobs allow the user to boost or cut any individual frequency or any combination of frequencies. Refer to Equalizer

Controls on page 19.

9. Information Display indicates the Sources,

Volume, other Audio Settings, Operational Functions and Setup Menu Settings

10. OUTPUT 1 and 2 Buttons with indicators switch

the Preamplier Outputs 1 and 2 On or Off.

11. HEADPHONES Connection to use with low impedance dynamic headphones for private listening.

Page 7

C55

C5 5 PR EAM PL IF IER

McINTOSH LABORATORY, INC. BINGHAMTON, NY

HANDCRAFTED IN USA WITH US AND IMPORTED PARTS

BALANCED INPUTS PROCESSOR LOOP

1R 1L 2R 2L 3R 3L

120V 50/60Hz

75 WATTS

SERVICE

PORT

Inputs

1. AC Input uses a power cord to connect to an AC Outlet.

2. BALANCED INPUTS (1 thru 3) accept high-level program source signals.

3. SERVICE USB is a USB Type-A port used for service

purposes only.

4. POWER CONTROL Passthru receives On/Off signals from an Audio/Video Processor.

5. POWER CONTROL MAIN sends On/Off signals to

a McIntosh Component when the C55 Preamplier is

switched On/Off.

6. IR IN accepts an external IR receiver using a 3.5mm stereo mini phone plug cable.

7. PROCESSOR LOOP RETURN receives audio from an external equalizer or room correction processor.

8. NETWORK for a wired internet connection via ethernet.

9. UNBALANCED INPUTS (1 thru 4) accept high-level

program source signals.

MAIN / HIGH PASS OUTPUT 1 / LOW PASS

BAL R BAL L BAL R BAL L

POWER CONTROL

TRIG 3

TRIG 1

TRIG 2

TRIG 4

UNBAL UNBAL UNBAL

RETURN

EXTERNAL CONTROL DATA PORTS

MAIN

PASSTHRU

IR IN

RS232

SEND

BAL R BAL L

UNBALANCED INPUTS

1 42

NETWORK

CONTROL / UPDATE

ONLY

10. USB AUDIO Input is a USB Type-B connector used to connect the C55 to a computer to stream digital audio.

11. HDMI (ARC) Input connects with a compatible ARC TV using an HDMI cable to share control and digital audio connectivity.

Note: The HDMI ARC functionality of the C55 is only compatible

with ARC TVs. Other devices like DVD and Blu-ray players will not work.

12. MCT Input transfers signals from McIntosh products with an MCT connector and is required for SACD audio.

13. COAX Inputs (1 and 2) accept coaxial cables for digital signals.

14. OPTICAL Inputs (1 and 2) accept optical connections for digital signals.

15. PHONO Inputs (Right and Left channels) accept signals from a Phono Cartridge.

OUTPUT 2 (SUBWOOFER)

HDMI (ARC)

SERIAL

NUMBER

CAUTION

RISK OF ELECTRIC SHOCK

DIGITAL AUDIO INPUTS

USB AUDIO

MCT OPTICAL 2 OPTICAL 1

DO NOT OPEN

SERIAL

NUMBER

PHONO INPUTS

DA2 DIGITAL AUDIO MODULE

GND

COAX 2

COAX 1

Outputs

A. BALanced Outputs each use an XLR

connector cable for a balanced output signal.

B. UNBALanced Outputs use an RCA connector

cable for an unbalanced output signal.

C. POWER CONTROL TRIG (1 thru 4) send

On/Off signals to other McIntosh components.

D. RS232 Connector communicates with external

control devices using a 3.5mm stereo mini phone plug cable.

E. DATA PORTS retransmit remote control

signals to source components.

F. PROCESSOR LOOP SEND jack delivers

audio to an external equalizer or room correction processor.

Page 8

Navigating the Remote Control

1. Switch Device: Select different devices for remote

operation. Selected device is indicated by the LED indicator.

2. Setup Button: Used to enter Setup Menu.

3. Level Up/Menu: Adjusts Trim Functions settings.

Accesses menu on compatible devices.

4. Tr im/Guide: Enters Trim Functions menu. Opens guide on compatible devices.

5. Info/Level Down: Adjusts Trim Functions settings. Accesses info on compatible devices.

6. Input: Changes and selects different inputs.

7. Mute: Mutes audio playback.

8. Previous/Previous Preset: Return to your previ

ous media selection.

9. Fast Reverse/Seek Down: Navigate backwards through the current active media using this button.

10. Fast Forward/Seek Up: Navigate forward through the current active media using this button.

11. Next/Next Preset: Jump to your next media selection or navigate to the next tuner preset.

12. Volume: Used to adjust the volume.

13. Mode/Exit: This will exit the Trim Functions

menu. It will also display information or certain options.

14. Select: Selects the highlighted option.

15. Power Off: Turns off the selected device shown

by the LED.

16. Power On: Turns on the selected device shown by the LED.

Note: The HR085 Remote Control has buttons used to control

multiple devices. Buttons whose function are not described are for use with other McIntosh products. For more information, refer to the HR085 Owner's Manual on the McIntosh website at www.mcintoshlabs.com.

Remote Control Batteries

The HR085 Remote Control included with the C55

is powered by two AAA batteries (not included). To insert or remove batteries, open the battery compartment by removing the cover located on the back of the remote control. To open, pull the clasp located just above the opening downward.

Additional Discrete Commands

Additional discrete commands for external

control systems are available:

• BAL 1, 2, 3

• UNBAL 1, 2, 3, 4

• PHONO 1, 2

• COAX 1, 2

• OPT 1, 2

• USB

• MCT

• HDMI

• Power (Cycle) These additional commands can be accessed

using an optional McIntosh HR093 Service Remote Control. A list of these commands as well as Pronto Hex Codes can be found in the C55 Pronto Hex Codes document located in the Download section of the C55 product information at www.mcintoshlabs.com

You can also contact McIntosh Technical

Assistance or your dealer for more information.

Page 9

C55

How to use the Remote Control

The supplied C55 Remote Control (HR085) is

capable of directly controlling the functions of contemporary McIntosh Source Components connected to the C55 via the Data Ports.

Notes: 1. If at any time the C55 seems unresponsive to the HR085

Remote Control Commands, press the DEVICE Button to select first.

2. For additional information on using the HR085 Remote Control with the McIntosh Model, please refer to the “How to Operate” starting on page 20.

3. For additional information on assigning the Data Ports, refer to “Data Ports” on page 13.

Trim

Press the TRIM Button until the desired Trim function (Balance, Trim Level, etc.) appears on the C55 Front Panel Display, then press the LEVEL Up or Down Button to adjust the Trim setting.

Note: Press the TR IM Button to recall the last Trim function

selected. For additional information on using the Trim Functions refer to pages 18-19.

Output Selection

Press the BLUE (Setup) Button followed by the AM (Output 1) or FM (Output 2) Button, to control the Rear Panel Audio OUTPUTS 1, 2 (ON or OFF) and Power Control TRIG 1 / TRIG 2.

Note: For additional information on assigning the Outputs (1 and

2) and Power Control Triggers (1 and 2) refer to page 3.

The supplied HR085 Remote Control is capable of

directly controlling the functions of contemporary Source Components connected to the C55 via the Data Ports.

Note: If at any time the C55 seems unresponsive to HR085 Remote

Control Commands press the

Button first.

Mute

Press the MUTE Button to mute the audio in all outputs except the SEND OUTPUT. The word MUTE will appear on the Front Panel Information Display. To un-mute the audio, press the MUTE Button again.

Disc, Server and Tape Functions

Use these buttons to operate a DVD Player, CD Player, CD Changer, Music Server or Recorder.

Numbered Buttons

Press Buttons 0 through 9 to access tuner station presets, tracks on discs or selections on a Music Server.

Disc and Track

Use the AM (disc) and FM (track) Buttons when a Disc Player or Music Server is being used.

Tun e r Bu t t ons

Press the AM or FM Button to select the desired broadcast band. Press and release the Channel Up p or Down q Button to seek the next available station. Press and hold a Channel Up p or Down q Button to seek continuously from station to station.

Volume

Press the Up p or Down q VOLUME Button to raise or lower the listening volume level.

Note: The Record Signals present at REC OUTPUTS are not

affected by volume changes.

Pause

Press the Pause Button to perform various functions on a variety of McIntosh Components. It will also pause the playing of a disc or tape player.

Trim

Press the TRIM Button until the desired Trim function (Balance, Trim Level, etc.) appears on the Front Panel Information display, then press the LEVEL Up p or Down q Button to adjust the Trim setting.

Note: Press the TR IM Button to recall the last Trim Function

selected. For additional information on the Trim Functions refer to pages 18 and 19.

Amplier Selection

Press the BLUE (Setup) Button followed by the AM (Output 1) or FM (Output 2) Button, to control the rear panel Audio OUTPUTS 1, 2 (ON or OFF) and Power Control OUTPUT 1 / OUTPUT

2. These OUTPUTS provide signals to a Power

Amplier or other accessory component.

Page 10

Setup Menus

System Setup Menu

The Setup Menus are listed below.

• System

• Digital

• Inputs

• Outputs

• Tr iggers

• Data Out

• External Control

How to Navigate the Setup Menus

Your McIntosh C55 has been factory congured for

default operating settings that will allow immediate enjoyment of superb audio without the need for further adjustments. If you wish to make changes to the factory default settings, a Setup Menu is provided to customize the operating settings using the Front Panel Information Display.

Note: If the C55 is currently On, proceed to step 2.

1. Press and hold in the INPUT Knob until the Front Panel Information Display indicates

SETUP: Menu Select

< System >

2. Rotate the INPUT Knob to select any of the available submenus.

3. To enter the selected submenu, press and hold

the INPUT Knob.

4. Rotate the INPUT knob to navigate available options in the selected submenu.

5. Rotate the VOLUME knob to change the

selected option’s value.

6. To exit from the Setup Menu, or any of the

submenus, press the INPUT Knob.

Settings Options

Product Information _._._

Update Check for Update

Passth ru Off

Auto Off Enabled, Disabled

Power Save Enabled, Disabled

Restore Defaults Default Settings

Factory Reset Default Settings

Product Information

Specic identifying information for the C55,

including the System Firmware Version, can be found on the Product Information page of the

System Setup Menu. This rmware effects the main circuitry and can be identied by opening the

System Setup Menu. To update, see the following section.

Update

By default, the C55 will periodically check for updates. To disable automatic updates, perform the following steps:

1. Use the INPUT Knob to enter the System Setup Menu.

2. Rotate the input until the following appears on

the Information Display.

System: < Update >

Automatic >

3. Rotate the VOLUME Knob to until the follow-

ing appears on the Information Display.

System: < Update >

< Manual (Hold Input)

4. To check for a Firmware update in Manual

mode, hold the INPUT Knob. After a few

seconds, the Information Display will indicate that a check is being performed. If an update is found, it will be deployed immediately.

5. Exit the System Setup Menu by pressing the

INPUT Knob.

Page 11

System Setup Menu (continued)

C55

Passthru

When the C55 is part of a Home Theater or Multichannel Audio System, the Right and Left Front Channels from an Audio/Video Processor or Surround Decoder can “Passthru” the C55 and onto

its associated Power Amplier(s). The Passthru setting allows selection of the specied C55 Input

to be used for the Right and Left Front Channels. In the example below, the Right and Left Front Channels from the Audio/Video Processor will be connected to the BALanced 2 Input Connectors on the C55. Refer to pages 7 for additional connection information.

Note: The Phono and Digital Inputs are not assignable as a

Passthru Input.

1. Use the INPUT Knob to enter the System Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

System: < Passthru >

Off >

Auto Off

The C55 incorporates an Auto Off feature, which

automatically places the Preamplier into the

Standby/Off Mode. This occurs approximately 30 minutes after there has been an absence of user activity (includes changes to any of the Operation Functions such as source selection, volume adjust ment, etc.) or absence of an audio signal. This feature is turned on by default but can be disabled

in the System Setup Menu.

Power Save

Disabled: The network connection will remain active during standby. May also reduce wake up time.

Enabled: The network connection will be lost in standby. The unit can be turned on by IR remote control, power control, RS232, or by pressing the front panel STANDBY/ON Button.

Restore Defaults

To reset all the adjustable settings (Setup and Trim Settings) to the factory default values, perform the following steps:

1. Select the Defaults option in the System Setup Menu. The following should be on the

Information Display.

System: < Defaults >

Hold INPUT to Reset

3. Press and hold in the INPUT Knob until the

following appears on the Information Display,

then release the INPUT Knob.

System: < Defaults >

In Progress!

System: < Defaults >

Completed!

4. Press the front panel STANDBY/ON Button to switch the C55 on.

3. Rotate the VOLUME Knob to select “BAL 2” Input.

System: < Passthru >

< BAL 2 >

4. Exit the System Setup Menu by pressing the

INPUT Knob.

Factory Reset

To reset all adjustable settings and clear all network information, select Factory Reset and follow the same process as above.

Page 12

Digital Setup Menu

Settings Options

DA Firmware Version

DA Update

OPT 1 Gain 0dB to +15dB in 1dB intervals

OPT 2 Gain 0dB to +15dB in 1dB intervals

HDMI Gain 0dB to +15dB in 1dB intervals

HDMI Lip Synchronize Mode Manual, Automatic

HDMI CEC Power Disabled, Enabled

HDMI CEC Volume Disabled, Enabled

DA Firmware Version

The C55 functionality is controlled by internal software that is know as Firmware. The Firmware Number for the Digital Audio Circuitry of the C55, and can be viewed by following the steps below:

1. Press and hold the INPUT Knob to enter the

Setup Menu.

2. Rotate the INPUT Knob until the Front Panel Information Display indicates

SETUP: Menu Select

< Digital >

3. Press and hold the INPUT Knob to open the Digital Setup Menu and the Information Display will show the DA Firmware version.

DA Update

This option is for service purposes only.

Digital Gain

The C55 offers Digital Gain Adjustments for the HDMI, OPTICAL 1 (OPT 1) and OPTICAL 2

(OPT 2) Inputs. The change in gain of a specic

Digital Input, will produce a change in playback volume of the music. To change the gain for the HDMI Input perform the following steps:

1. Use the INPUT Knob to enter the Digital Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

Digital: < HDMI (ARC) >

+15dB

3. The gain can be adjusted in 1dB Gain steps by

rotating the VOLUME Knob counterclockwise

to reduce the gain downwards from +15 dB all the way to 0dB.

4. To adjust other Gain values, rotate the INPUT

Knob to select OPT 1 or OPT 2 and the gain is

adjustable in 1dB Gain steps. 0 dB is the default setting for Optical 1 and Optical 2.

Digital: < OPT 1 >

0 dB

5. The gain can be increased by rotating

VOLUME Knob clockwise to increase the gain

from 0 dB with an increase all the way up to

+15 dB or +8dB from 0 dB.

Digital: < OPT 1 >

+ 15 dB

HDMI (ARC) CEC Power

The C55 HDMI Input Connector has (ARC) Audio Return Channel Circuitry, allowing the Audio Selection and Control Command of HDMI TV/ Monitor Devices. By default the HDMI Input is

congured to accept Power commands via CEC.

To prevent the CEC Power Control of the C55, simply change HDMI CEC Power from On to Off.

Digital: < CEC Power >

< Enabled

Digital: CEC Power

Disabled >

HDMI (ARC) CEC Volume

To change the Consumer Electronics Control (CEC) of the volume, perform the following steps:

1. Use the INPUT Knob to enter the Digital Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

Digital: < CEC Volume

< Enabled

3. To deactivate the Consumer Electronics Control

(CEC), rotate the VOLUME Knob until the

following appears on the Information Display.

Digital: < CEC Volume

Disabled >

Digital: < OPT 2 >

+ 8 dB

Page 13

Digital Setup Menu (continued)

C55

Inputs Setup Menu

HDMI (ARC) Lip Sync Mode

The C55 HDMI Input Connector (ARC), also has another control function. When listening and viewing a TV/Monitor HDMI Input Signal, the ARC circuitry provides a synchronized Video and Audio TV/Monitor Signal. To switch Off the AUTO Synchronised Video and Audio TV/Monitor Signal, perform the following steps:

1. Use the INPUT Knob to enter the Digital Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

Digital: < Lip Sync >

< Auto

3. To manually congure the lip sync delay, rotate

the VOLUME Knob until the following appears

on the Information Display.

Digital: < Lip Sync >

Manual >

4. The delay time can then be adjusted from the

Trim Menu when the HDMI (ARC) Input is selected.

Setting Options

BAL 1-3 On/Name, Off

UNBA L 1-4 On/Name, Off

PHONO 1, 2 On/Name, Off

COAX 1, 2 On/Name, Off

OPT 1, 2 On/Name, Off

USB On/Name, Off

MCT On/Name, Off

HDMI(A RC) On/Name, Off

Hold the INPUT Knob to open the Inputs Setup

Menu and from there, the following changes can be made:

SETUP: Menu Select

< Inputs >

On/Name: The selected input will be functioning

as normal. Hold in the INPUT Knob to enter the

menu to rename the input*. Off: The selected input will be deactivated and

will no longer be selectable from the main display during normal use. Change this setting back to “On /Name” to make it selectable again.

*Naming Inputs: While in the selected input’s submenu, use the INPUT Knob to navigate to the input with the name you’d like to change (and turn it On using the VOLUME Knob if it isn’t already)

so that the display says “Inputs: [ input name ]

On/Name” and hold the INPUT Knob to begin

renaming. The character you are currently adjust

ing will be blinking. Rotate the INPUT Knob to

select which character you want to change and use

the VOLUME Knob to change the character.

Page 14

Outputs Setup Menu

The Outputs Setup Menu provides the ability to change how the C55 Output 1, Output 2 and Headphones function.

Settings Options

Output Mode Switched, Unswitched,

Bi-Amped (Fixed), Bi-Amped (Split)

Output Trim Level (only Output 1)

Bi-Amp Center Frequency

-6.0dB to +3.0dB in 0.5dB intervals

150Hz, 350Hz, 900Hz

(only Fixed Mode)

Bi-Amp High Pass Frequency (only Split Mode)

Bi-Amp Low Pass

Bypass, 50Hz, 100Hz, 250Hz

600Hz, 1200Hz, 3000Hz

Frequency (only Split Mode)

Dual Mono (Output 2) Off, On

Headphones Mute All Outputs, Mute No

Outputs

Output Mode

The Outputs on the C55 can be independently

congured to operate in one of several modes.

• Switched (Default) - The Output is set to allow

toggling by using the Front Panel OUTPUT 1 and 2 Buttons, or by using the OUTPUT 1 and 2 Buttons on the Remote Control.

• Unswitched - The Output is set to On, and

toggling is disabled.

• Bi-Amped (Fixed) - This mode is a variant of

Unswitched that is exclusive to Output 1 and enables the Bi-Amp Circuitry in Fixed Mode.

• Bi-Amped (Split) - This mode is the same as

Bi-Amped (Fixed) but Bi-Amp Circuitry is in Split Mode.

Output Trim Level

Adjusts the level of Output 1 relative to the Main Output. This setting is always active, and is useful for bi-amping.

Bi-Amp Circuitry

The C55 has internal, adjustable crossover. The

C55’s crossover tailors the output frequency range of each amplier section to the attached

loudspeaker. In Fixed Mode, simply set the

Center to the loudspeaker’s Crossover Point, then

frequencies above the Crossover Point will be sent to the MAIN Output and frequencies below the Crossover Point will be sent to Output 1. In

Split Mode, the lter’s corner frequencies can be independently congured. As an example, the

High Pass Outputs could be sent to a vacuum tube

amplier, and the Low Pass Outputs could be sent to a solid-state amplier. This adjustable crossover

allows you to optimize the performance of your

ampliers to your speaker’s specications and

to your listening preferences. A direct feed can

also be connected to each amplier section, thus

bypassing the internal crossover.

-2

-4

-6

-8

-10

Decibels

-12

-14

-16

-18

-20

-22

-24

-26 20 30 50 100 200 300 500 1k 2k 3k 5k 10k 20k

CROS SOVER P OINTS

150Hz 350 Hz

High Pass Response

(Lo w Cut)

900Hz

Frequency (Hz)

Combined Response

(Fu ll R ange)

Low Pass Response

(Hi gh Cut)

Dual Mono

Output 2 can be congured as either a stereo

or mono output. These connections can feed an

additional full range amplier and speaker system,

or can feed a single mono subwoofer or 2 separate Left/Right (stereo) subwoofers.

Headphones

The C55 Default Setting for using Headphones is to automatically mute all the Output Connectors when the Headphone Cable Plug is inserted into the C55 Front Panel HEADPHONES Jack. There are two available settings:

Mute All Outputs Mute No Outputs

1. Rotate the INPUT Knob until the following appears on the Information Display.

Outputs: < HEADPHONES

Mute All Outputs >

2. Rotate the VOLUME Knob to change the

current HEADPHONES setting.

Outputs: < HEADPHONES

< Mute No Outputs

3. Exit the Outputs Setup Menu by pressing the

INPUT Knob.

Page 15

Triggers Setup Menu Data Out Setup Menu

C55

The C55 has four Power Control Triggers Connections. When the C55 Is On, the Triggers are either activated or deactivated. Trigger 1, 2, 3 and 4 settings can be assigned to one of the available Outputs, or any combination of Inputs. These settings will control the operational power to the components connected to the various C55 Trigger Output Connectors. Perform the following steps to setup the Trigger:

1. Use the INPUT Knob to enter the Data Out Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

SETUP: Menu Select

< Triggers >

3. Press and hold in the INPUT Knob to select the

Triggers Menu.

4. Rotate the INPUT Knob to select between

TRIGGER 1, TRIGGER 2, TRIGGER 3, or TRIGGER 4.

5. Rotate the VOLUME Knob to change the

selected Trigger’s assignment.

6. If “Input” is selected as in the image to follow,

the Trigger will be congured according to

the Inputs that are enable in the corresponding submenu.

Triggers: TRIG 1 >

< Input (Hold INPUT)

7. To change the Trigger’s Input conguration,

press and hold in the INPUT Knob.

8. Rotate the INPUT Knob to navigate the set of

Inputs.

9. Rotate the VOLUME Knob to enable / disable the selected Input as in the following image.

Triggers: TRIG 1 >

< BAL 1 > : Off

10. Repeat steps 4-9 to congure any of the other Triggers.

11. Exit the Triggers Setup Menu by pressing the

INPUT Knob a couple times.

Data Port Connections between the C55 and a McIntosh Source Component allow for basic function control of the source component using

the C55 supplied HR085 Remote Control. By

default, all of the four Data Ports are set to send the same Data to the selected source. To dedicate a given Data Port for only one source component (example, source component connected to the BAL 1 Input will be assigned to Data Port 1) perform the following Steps:

1. Use the INPUT Knob to enter the Data Out Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

SETUP: Menu Select

< Data Out >

3. Press and hold in the INPUT Knob until the

following appears on the Display.

Data Out: PORT 1 >

All Data >

4. Rotate the VOLUME Knob to select “BAL 1”

Input.

Data Out: PORT 1 >

< BAL 1 >

5. In a similar manner, perform steps 3 and 4 to

assign any additional Data Ports.

6. Exit the Data Out Setup Menu by pressing the

INPUT Knob.

Page 16

External Control Setup Menu

Settings Options

Front I R Enabled, Disabled

RS232 Baud Rate 115200 Baud

IR Codes Normal, Alternate

IR Codes

The Remote Control included with the C55 utilizes the NORMAL McIntosh Control Codes. The Second Set of Control Codes the C55 will respond to is referred to as the ALTERNATE Codes. The Alternate Codes are used when the C55 is used in

the same location as another McIntosh Preamplier

and/or A/V Processor. This will prevent the Remote Control from affecting the operation of both units at the same time. To activate the Remote Control ALTERNATE Codes perform the follow ing steps:

1. Use the INPUT Knob to enter the External Control Setup Menu.

2. Rotate the INPUT Knob until the following appears on the Information Display.

Front IR

The C55 Front Panel Sensor, which receives the

signals from the HR085 Remote Control, can

be switched off to prevent interference when an external IR Sensor is connected. To de-activate the Front Panel IR Sensor perform the following steps:

1. Use the INPUT Knob to enter the External Control Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

Ext Ctrl: Front IR >

< Enabled

3. Rotate the VOLUME Knob to select “Disabled”.

Ext Ctrl: Front IR >

Disabled >

4. Exit the External Control Setup Menu by

pressing the INPUT Knob.

RS232 Baud Rate

The C55 may be remotely controlled from other equipment connected to the Rear Panel RS232 Jack. The speed at which the C55 communicates (8 bit, no parity and 1 stop bit) with other equipment is adjustable from 9,600 bits per second to 115,200 bits per second. To change from the default speed of 115,200 bits per second, perform the following steps:

1. Use the INPUT Knob to enter the External Control Setup Menu.

2. Rotate the INPUT Knob until the following

appears on the Information Display.

Ext Ctrl: < RS232 >

< 115200 Baud

3. Rotate the VOLUME Knob to select the desired

Baud Rate Speed.

4. Exit the External Control Setup Menu by

pressing the INPUT Knob.

Ext Ctrl: < IR Codes

< Normal

3. Rotate the VOLUME Knob to the Alternate Codes.

Ext Ctrl: < IR Codes

Alternate >

4. It is now necessary to change the HR085 Remote Control over to the Alternate Codes.

Information on the HR085 Remote Control

is available for download from the McIntosh website.

5. Exit the External Control Setup Menu by

pressing the INPUT Knob.

Page 17

System Conguration

C55

Connecting Components

Shown below are two typical system congurations. Your system may vary from this, however the actual components would be connected in a similar manner.

Note: The preamplifier or power amplifier may be connected to

the C55 balanced or unbalanced outputs.

Example 1

Example 2

AUDIO

SOU RCES

ANALOG OR

DIGI TAL

AUDIO

POW ER

CONTROL

DATA

REMOTE

CON T ROL

REMOTE

CON T ROL

The C55 has the ability to automatically switch power On/Off to Source Components via the Power Control connections. The Data Port Connections allow for the remote operation of basic functions using

the C55 Remote Control HR085. With an external sensor connected to the C55, remote control operation

of the system is possible from another room and/or when the C55 is located in a cabinet with the doors closed.

RS232 / NETWORK

CONTROL SYSTEM

SPEAKER

C55 AU DIO

PREAMPLIFIER

RS232 / NETWORK

CONTROL SYSTEM

MAIN

VAR IA BLE ANALOG AUDIO

POW ER CON TROL

VAR IA BLE ANALOG AUDIO

POW ER CON TROL

POW ER

AMP

FULL R ANGE)

(

POW ER

AMP

(HIGH PA S S)

SPEAKER

AUDIO

SOU RCES

ANALOG OR

DIGI TAL

AUDIO

POW ER

CONTROL

DATA

C55 AU DIO

PREAMPLIFIER

MAIN

OUT 1

OUT 2

VAR IA BLE ANALOG AUDIO

POW ER CON TROL

VAR IA BLE ANALOG AUDIO

POW ER CON TROL

POW ER

AMP

LOW PASS)

(

POWERED

SUBWOOFER

(OPTIONAL)

Page 18

Trim Functions MenuNetwork Information Menu

The Network Information Menu lists information about network connection. Press the VOLUME

Knob to open the Network Information Menu. Navigate between settings using the INPUT Knob.

The chart below details all of the available settings.

Settings Options

Connection Type Displays Connection Type

IP Address Displays IP Address

Ethernet MAC Address Displays Ethernet MAC Address

Wi-Fi MAC Address Displays Wi-Fi MAC Address

McIntosh Connect App

Press and hold the VOLUME Knob to put the C55

into Network Setup Mode. The NETwork Status LED will blink–indicating that network settings

can be congured from the McIntosh Connect

App.

Note: The C55 will exit Network Setup Mode if put into Standby.

The Trim Settings are stored in memory indepen

dently for each Input Source Selected, except the Meter Illumination and Display Brightness settings of On or Off, which are the same for all inputs.

How to Select and Adjust Trim Functions

1. Press the Front Panel INPUT Knob to open the

Trim Menu.

2. Rotate it to select the desired Trim Function.

3. Rotate the VOLUME Knob to change the

setting.

Note: the Remote Control TRIM Button together with the LEVEL

UP / LEVEL DN Button may also be used to access and change Trim Functions.

Approximately 5 seconds after making any changes, the Information Display will return to

indicate the Source Selection and Volume Level.

Trim Functions Menu Options

Settings Options

Balance L, Center, R

Input Trim -6dB to +6dB in 1dB intervals

Equalizer Mode On, Off

Mono/Stereo Mode Stereo, Mono

Processor Loop On, Off

Meter Lights On, Off

Brightness 4 Levels

Dim Bright

Phono Capacitance 50pF to 400pF in 50pF

increments

Phono Resistance

Phono Gain 40dB to 64dB in 6dB intervals

Lip Sync Delay 0 to 150ms in 10ms intervals

HXD Mode* On, Off

Note: HXD Mode will only appear if headphones are plugged in.

25, 50, 100, 200, 400, 1k, 47k Ω

Balance

Listening balance varies with different program sources, room acoustics and listening positions relative to the loudspeakers. Use the Balance (Trim Function) as needed to achieve approximately equal listening volume levels in each loudspeaker.

The Front Panel Display indicates the Balance changes are from 0 to 50 dB. After approximately 4 seconds the Information Display returns to indicate the Source Selection and Volume Level. To verify the Balance setting without changing it, use the TRIM Button and select Balance.

Input Trim Level

Source Components can have slightly different volume levels resulting in the need to readjust the

C55 VOLUME Knob when switching between

different sources. The C55 allows the adjustment of levels for each of the Source Inputs for the same relative volume.

Mono/Stereo Mode

By default, the Stereo Mode is active for all Input Sources however, any Input Source may be assigned to the Mono Mode of operation. To change Stereo Mode to Mono for a given Input Source, perform the same type of steps by using the Front Panel Controls or the Remote Control Pushbuttons as done for EQUALIZER Settings:

Note: The audio signal present at the SEND FIXED OUT Jacks is

affected by the Stereo/Mono setting.

Processor Loop

Connects or disconnects an external equalizer or room correction processor.

Page 19

2k 5k 10k 20k

Trim Functions Menu (continued) Equalizer Controls

C55

Meter Illumination

The Meter Illumination of McIntosh Power

Ampliers, when connected to the C55, may be

switched On or Off. If using non-McIntosh compo nents see page 21.

Information Display Illumination

The brightness level of the Front Panel Information Display can be adjusted. It has 4 levels that vary from dim to bright.

Phono Adjustments

First select the Phono 1 or Phono 2 Input then

press and rotate the INPUT Knob to display the

active type of load setting for the phono cartridge selected.

Phono Capacitance

Rotate the INPUT Knob to select desired

Capacitance. The available settings are: 50pF, 100pF, 150pF,

200pF, 250pF, 300pF, 350pF, and 400pF.

Phono Resistance

Rotate the INPUT Knob to select desired

Resistance.

The available settings are: 25Ω, 50Ω, 100Ω, 200Ω, 400Ω, 1KΩ, and 47kΩ.

Lip Sync Delay

When the Lip Sync Mode is set to Manual, and when the HDMI Input is selected, the Trim menu will allow the HDMI Audio Lip Sync Delay to be

adjusted from 0 to 150mS in 10mS intervals.

HXD Mode

When headphones are connected to the C55 Front Panel Jack, an additional TRIM function becomes

available. McIntosh’s HXD brings the acoustical

depth and spatiality of music normally heard with loudspeakers, to your headphones.

Note: The Headphone Output is optimized for impedances

ranging from 100 to 600 ohms.

Equalizer Mode

The built-in eight band Frequency Equalizer provides more precise adjustment of sound than standard Bass and Treble Controls. By default, the Equalizer is Off for all Input Sources and the Equalizer Circuitry is bypassed. Any Input Source may be assigned to have the Equalizer On when selected.

Note: The audio signal present at the SEND FIXED OUT Jacks is

unaffected by the Equalizer settings.

The C55 Equalizer has eight Frequency Controls which will raise or lower by 12 dB, the amplitude of the band of frequencies centered at the frequency marked above the controls. The center frequencies of these controls are at 25Hz, 50Hz, 100Hz, 200Hz, 400Hz, 1,000Hz, 2,500Hz and 10,000Hz. Both Left and Right Channels are

affected. At the center detent or at position of the

controls, the tone circuit components are removed from the signal path.

Note. The audio signal present at the SEND FIXED OUT Jacks is

unaffected by the Equalizer Circuitry.

+15

+10

M P L

+ 5

U D E

D E

- 5

I B E L

-10

-15 20 50 100 200 500 1k

FREQUENCY IN HERTZ

Phono Gain

Rotate the INPUT Knob to select desired Gain. The available settings are 40db, 46db, 52db, 58db,

and 64db.

Page 20

How to Operate the C55

Power On and Off

The Red LED above the STANDBY/ON Button lights to indicate the C55 is in Standby mode. To switch ON the C55, press the STANDBY/ ON Button on the Front Panel or the (Power

- Green) Button on the Remote Control. The C55 will go through a brief startup initialization with the Front Panel Information Display indicating the last used source and volume setting. This is followed by the volume setting indication starting at zero and then increasing to the last used volume setting.

BAL 1 15%

To switch OFF the C55 press the STANDBY/ON Button on the Front Panel or the (Power - Red) OFF Button on the Remote Control.

Note: For an explanation of the Remote Control Button functions,

refer to page 8.

Source Selection

Rotate the INPUT Knob to select the desired

source or press the INPUT Upp or Downq Button on the Remote Control.

PHONO 2 37% 50pF 200Ω

VOLUME Knob

Rotate the Front Panel VOLUME Knob or use the

VOLUME Upp or Downq Buttons on the Remote Control for the desired listening level.

Mute

Press the MUTE Button, on the C55 Front Panel or on the Remote Control, to Mute the Audio in all outputs (Main, Output 1, Output 2 and

Headphones) except the SEND FIXED OUT. The

Front Panel Information Display will indicate the Source Name and the word MUTE in place of the actual volume setting.

BAL 1 MUTE

Pressing the Mute Button a second time or adjust-

ing the VOLUME Knob (either the Front Panel or

Remote Control) will unmute the C55.

Output 1 and 2

Press the Front Panel OUTPUT 1 or OUTPUT 2 Button or use the Remote Control and press the SETUP/BLUE Button followed by the OUTPUT 1 or OUTPUT 2 Button, to send audio to separate

Power Ampliers connected to the rear panel

OUTPUT 1 or 2 Jacks. It also activates the POWER CONTROL TRIGger 1 or 2 Jacks on the rear panel of the C55. To stop the Audio and Power Control Signals from going to the separate Power

Ampliers, press the same Button(s) a second time.

Passthru

Refer to Passthru Information in the C55 Setup Section on page 14 to activate the function and select the desired Input on the C55.

The C55 will automatically turn On and switch to the previously setup Passthru Input when the McIntosh A/V Processor or Multichannel Surround

Decoder is turned-on. The Audio Preamplier

Front Panel Alphanumeric Display will indicate “Pas sth r u”.

The C55 OUTPUT 1 and 2 are active when in the Passthru Mode. The other Front Panel Controls and Buttons are deactivated as long as the Passthru Mode is active.

Headphone Jack

Connect a pair of dynamic headphones to the Headphones Jack with a 1/4” (0.635cm) stereo phone type plug for private listening. The default

setting is for all of the Power Amplier Output

Connections (1 and 2) to automatically mute.

How To Make a Recording

1. Select the desired signal source you wish to

record by using the Front Panel INPUT Knob

or using the INPUT UP / DOWN Button on the Remote Control.

2. Adjust the record level using the recorder level control and proceed with the recording process.

3. Listen to the playback of the program source just recorded by selecting the Input Source connected to the recorder component output.

Page 21

How to Operate the C55 (continued)

C55

Troubleshooting

Digital Inputs

When a Digital Input on the C55 is selected, the Front Panel Information Display indicates the sample rate or audio format when a signal is present.

During the time there is no Digital Signal present the display will indicate “______”.

MCT Input

When playing a multi-layer SACD, select the stereo (SACD) or CD layer. The multi-channel layer will not reproduce sound.

Optical

The two Optical Inputs allow digital sources to

be connected to the C55 using TOSLINK cables

also known as “optical audio cables.” The optical inputs can handle high resolution digital audio up to 192kHz/24-bit. The C55 DAC will process standard format S/PDIF PCM signals and Dolby Digital and DTS bitstreams. Unsupported formats can result in strange and/or unpleasant sounds.

Coaxial

The two Digital Coaxial Inputs allow digital sources to be connected to the C55 using Digital

Audio RCA Coaxial cables. The COAX inputs

can handle high-resolution digital audio up to 192kHz/24-bit. The C55 DAC will process standard format S/PDIF PCM signals and Dolby Digital and DTS bitstreams. Remember, unsup

ported formats can result in strange and/or unpleasant sounds.

HDMI ARC

The HDMI ARC (Audio Return Channel) allows you to use your entire audio system to play the sound from your TV.

Notes:• Ensure you are connected to the TV’s HDMI input

port that is labeled “ARC”.

•

Your TV’s setup menu and settings may need to be

adjusted before sound is heard.

•

When the C55 is set to the HDMI input, the

unit will automatically turn On and Off with the TV. The front display will show “Entering HDMI Standby Mode” when turning Off.

•

Multi-channel formats will be down mixed to a

2-channel output.

Audio formats supported by HDMI ARC:

• PCM (2 channel)

• Dolby Digital (up to 5.1 channel)

• DTS Digital Surround (up to 5.1 channel)

USB Audio

The USB Audio Input of the C55 provides the capability to receive music/sound in a digital format from a connected computer.

Software Requirements

Apple communicate with the C55 without any installa tions necessary.

For Windows-based computers (PC), Windows 7 (Service Pack 1) or later is required. The correct McIntosh USB Audio driver must be installed for the PC to communicate with the C55.

To install the McIntosh USB driver for Windowsbased computers download the latest driver from the McIntosh website.

The driver can be found in the Downloads section of the webpage under Software Updates. Choose the DA2 Digital Audio Module: McIntosh USB Audio Windows Driver. You may select this driver in many third-party applications such as JRiver Media Center.

The C55’s display will show the sampling rate or

bit rate for the USB Audio Input.

computers with OS-10.6.8 are able to

Reset of Microprocessors

In the unlikely event the controls of the C55 stop functioning, the microprocessors can be reset by performing the following:

1. Press and hold in the STANDBY/ON Button until the LED above the STANDBY/ON Button illumination is extinguished. Then release the STANDBY/ON Button.

2. To switch the C55 back On, press the STANDBY/ON Button.

Note: This can be performed with the C55 On or in the Standby

Mode.

Meter Lights

Meter lights in Power Amps and Source units have the ability to be turned On and Off by the C55. But sometimes if a non-McIntosh unit is used, the Meter lighting circuit is defeated and the lights are always Off.

To remedy this, place a 173419 Trigger Adapter Cable in-line with the normal 170202 Power Control cable.

This Adapter leaves the ring terminal uncon nected, which allows the meter lights to remain illuminated.

Non-McIntosh

Product

TRIGGER OUT

System Connection Example

173419 170202

M – F

Adapter Cable

M – M

Stereo Cable

McIntosh

Product

POWER CONTROL IN

TRIGGER IN

PASS THRU IN

Page 22

Specications

Note: all measurements with EQ filters and output filters bypassed.

Frequency Response

+0, -0.5dB from 20Hz to 20,000Hz +0, -3dB from 15Hz to 100,000Hz

Total Harmonic Distortion

0.005% from 20Hz to 20,000Hz

Rated Output

2.5V Unbalanced, 5V Balanced (Main) 450mV (Fixed Output)

Maximum Voltage Output

8V RMS Unbalanced, 16V RMS Balanced

Sensitivity (for rated output)

High Level, 450mV Unbalanced, 900mV Balanced Phono MM, 4.5mV Phono MC, 0.45mV

Signal To Noise Ratio (A-Weighted)

High Level - 100dB (Below rated output)

MM Phono - 82dB (Below 5mV input) MC Phono - 80dB (Below 0.5mV input)

Input Impedance

High Level 22K ohms Unbalanced

44k ohms Balanced Phono 1, 2 (MM and MC) 25, 50, 100, 200, 400, 1k or 47k ohms 50 to 400pF in 50pF steps

Maximum Input Signal

High Level, 5V Unbalanced, 10V Balanced

Phono MM, 80mV Phono MC, 8mV

Equalizer Controls

25Hz, 50Hz, 100Hz, 200Hz, 400Hz, 1,000Hz, 2,500Hz and 10,000Hz

Voltage Gain

High Level to Fixed Output: 0dB High Level to Main Output: 15dB Phono 1, 2 (MM and MC) Selectable 40dB, 46dB,

52dB, 58dB, or 64dB

Output Impedance

100 ohms Unbalanced 200 ohms Balanced

Headphone Load Impedance

100 ohms to 600 ohms

Digital Input Sample Rates

Coaxial: PCM -16Bit, 24Bit - 44.1kHz to 192kHz Optical: PCM - 16Bit, 24Bit - 44.1kHz to 192kHz USB: PCM - 16Bit, 24Bit, 32Bit - 44.1kHz to

384kHz

MCT: PCM, SACD, -16Bit, 24Bit - 44.1kHz to 192kHz

DXD - DXD352.8kHz, DXD384kHz DSD - DSD64, DSD128, DSD256, DSD512

HDMI: PCM 24bit, 44.1kHz - 192kHz DTS Dolby Digital

Power Control and Trigger Output

12VDC, 25mA

Power Requirements

Field AC Voltage conversion of the C55 is not

possible. The C55 is factory congured for one of

the following AC Voltages:

100 Volts, 50/60Hz at 75 watts 110 Volts, 50/60Hz at 75 watts 120 Volts, 50/60Hz at 75 watts 220 Volts, 50/60Hz at 75 watts 230 Volts, 50/60Hz at 75 watts 240 Volts, 50/60Hz at 75 watts Standby Power, less than 0.5 watts

Note: Refer to the rear panel of the C55 for the correct voltage.

Overall Dimensions

Width is 17 1/2 inches (44.4cm)

Height is 7 5/8 inches (19.4cm) including feet Depth is 18 inches (45.72cm) including the Front

Panel, Knobs and Cables

Weight

28 pounds (12.5 kg) net, 43.5 pounds (19.7 kg) in

shipping carton

Shipping Carton Dimensions

Width is 27 inches (68.6cm)

Height is 12 inches (30.5cm) Depth is 25 inches (63.5cm)

Trademarks of McIntosh Laboratory, Inc.:

The following are Registered Trademarks of McIntosh Laboratory, Inc. in multiple jurisdictions around the world: the written McIntosh logo; the McIntosh Globe logo; the Mc logo; Power Guard; Power Guard Screen Grid Sensor; Power Guard SGS; Sentry Monitor; LD/HP;

Dynamic Power Manager; the 4DPM8 logo; HXD; the HDX logo; Behind The Sound; Legendary Performance.

The following are Trademarks of McIntosh Laboratory, Inc. in multiple jurisdictions around the world: Autoformer; Solid Cinch; McIntosh Monogrammed Heatsinks; Hybrid Drive; DualView; TripleView; Made of Sound.

The foregoing trademarks, registered and otherwise, are not to be used, reproduced, or registered in any way without the express written permission of McIntosh Laboratory, Inc.

Page 23

Packing Instructions Parts List

C55

In the event it is necessary to repack the equipment for shipment, the equipment must be packed exactly as shown below. It is very important that

the four plastic feet are attached to the bottom of the equipment. This will ensure the proper equipment location on the bottom pad. Failure to do this will result in shipping damage.

( )

Use the original shipping carton and interior parts only if they are all in good serviceable condition. If a shipping carton or any of the interior part(s) are needed, please call or write Customer Service Department of McIntosh Laboratory. Refer to page 2. Please see the Part List for the correct part numbers.

Quantity Part Number Description

1 033888 Shipping carton only

4 034670 End cap

1 033697 Inside carton only 1 034414 Top pad (foam) 1 034576 Bottom pad

4 017937 Plastic foot 4 400159 #10-32 x 3/4” screw

4 404080 #10-7/16” Flat washer

Page 24

McIntosh Laboratory, Inc.

2 Chambers Street

Binghamton, NY 13903

www.mcintoshlabs.com

The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice. The C55 is designed to employ non-McIntosh-provided services some of which require separate customer subscriptions and some of which do not, as part of the Product’s functionality. Because McIntosh cannot control the providers of such services or the services themselves, the owner of the Product therefore assumes all risks related to the use of services provided by anyone other than McIntosh itself. McIntosh cannot and does not warrant against, and shall have no liability of any kind for any of the following that are attributable to non- McIntosh providers or services: (i) interruption, discontinuance, or other unsatisfactory performance of service; (ii) reduced Product function-

ality that is so attributable; or (iii) any other loss or damage of any kind that is so attributable.

Printed in the U.S.A.

McIntosh Part No. 24124000