Crown XS-1200, XS-500, XS-700, XS-900 Owners manual

5 (1)

Xs Series

Xs500

Xs700

Operation Manual

Xs900

Xs1200

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.

This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance.

The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.

Trademark Notice: Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the property of their respective owners.

Some models may be exported under the name Amcron.®

©2005 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 465157-9439 U.S.A. Telephone: 574-294-8000

136268-6A 8/05

Xs Series Power Amplifiers

Important Safety Instructions

1)Read these instructions.

2)Keep these instructions.

3)Heed all warnings.

4)Follow all instructions.

5)Do not use this apparatus near water.

6)Clean only with a dry cloth.

7)Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8)Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9)Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10)Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11)Only use attachments/accessories specified by the manufacturer.

12)Use only with a cart, stand, tripod, bracket, or

table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

13)Unplug this apparatus during lightning storms or when unused for long periods of time.

14)Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as powersupply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

15)WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

16)DO NOT EXPOSE TO DRIPPING OR SPLASHING. DO NOT PLACE OBJECTS FILLED WITH LIQUID, SUCH AS VASES,ON THIS APPARATUS.

TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ PAS LES COUVERCLES. IL N’Y A PAS DES PARTIES SERVICEABLE À L’INTÉRIEUR. TOUS REPARATIONS DOIT ETRE FAIRE PAR PERSONNEL QUALIFIÉ SEULMENT.

TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD PLUG FROM THE AC RECEPTACLE. THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY OPERABLE.

WATCH FOR THESE SYMBOLS:

The lightning bolt triangle is used to alert the user to the risk of electric shock.

The exclamation point triangle is used to alert the user to important operating or maintenance instructions.

IMPORTANT

Xs Series amplifiers require Class 2 output wiring.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equipment such as preamplifiers or tape decks directly above or below the unit. Because this amplifier has a high power density, it has a strong magnetic field which can induce hum into unshielded devices that are located nearby. The field is strongest just above and below the unit.

If an equipment rack is used, we recommend locating the amplifier(s) in the bottom of the rack and the preamplifier or other sensitive equipment at the top.

FCC COMPLIANCE NOTICE

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

page 2

Operation Manual

Xs Series Power Amplifiers

Crown International, Inc.

DECLARATION of CONFORMITY

Issued By: Crown International, Inc.

FOR COMPLIANCE QUESTIONS ONLY: Sue Whitfield

1718 W. Mishawaka Road

574-294-8289

Elkhart, Indiana 46517 U.S.A.

swhitfield@crownintl.com

 

 

European Representative's Name and Address:

 

Nick Owen

 

35, Bassets Field

 

Thornhill

 

Cardiff. South Glamorgen

 

CF14 9UG United Kingdom

 

Equipment Type: Commercial Audio Power Amplifiers

 

Family Name: Xs

 

Model Names: Xs1200, Xs900, Xs700, Xs500

 

EMC Standards:

EN 55103-1:1995 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions

EN 55103-1:1995 Magnetic Field Emissions-Annex A @ 10 cm and 1 M

EN 61000-3-2:1995+A14:2000 Limits for Harmonic Current Emissions (equipment input current 16A per phase)

EN 61000-3-3:1995 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current 16A

EN 55022:1992 + A1: 1995 & A2:1997 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B

EN 55103-2:1996 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity

EN 61000-4-2:1995 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)

EN 61000-4-3:1996 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)

EN 61000-4-4:1995 Electrical Fast Transient/Burst Immunity (Criteria B)

EN 61000-4-5:1995 Surge Immunity (Criteria B)

EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)

EN 61000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variation

Safety Standard:

EN 60065: 1998 Safety Requirements - Audio Video and Similar Electronic Apparatus

I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.

 

Signed

 

Larry Coburn

Date of Issue: March 1, 2003

Title: Senior Vice President of Manufacturing

 

Operation Manual Due to line current harmonics, we recommend that you contact your supply authority before connection. page 3

Xs Series Power Amplifiers

Table of Contents

Important Safety Instructions ...........................................................

2

4

Advanced Features and Options .............................

14

Declaration of Conformity ................................................................

3

 

4.1 Protection Systems ...............................................................

14

1 Welcome .......................................................

5

 

4.1.1 Output Current Limiting ...............................................

14

1.1

Features ...............................................................................

5

 

4.1.2 DC Protection ..............................................................

14

1.2

How to Use This Manual ......................................................

5

 

4.1.3 Circuit Breaker .............................................................

14

2 Setup ............................................................

6

 

4.1.4 Thermal Protection ......................................................

14

2.1

Unpack Your Amplifier ........................................................

6

5

Troubleshooting ...............................................

15

2.2

Install Your Amplifier ..........................................................

6

6 Specifications .................................................

16

2.3

Ensure Proper Cooling .......................................................

6

7

AC Power Draw and Thermal Dissipation ..................

18

2.4

Choose Input Wire and Connectors ....................................

7

8

Service . .......................................................

21

2.5

Choose Output Wire and Connectors ..................................

7

 

8.1 International and Canada Service .........................................

21

2.6

Wire Your System ...............................................................

8

 

8.2 US Service ............................................................................

21

 

 

2.6.1 Stereo Mode ..............................................................

8

 

8.2.1 Service at a US Service Center ....................................

21

 

 

2.6.2 How to Parallel the Inputs...........................................

8

 

8.2.2 Factory Service ............................................................

21

 

 

2.6.3 Bridge-Mono Mode ...................................................

9

 

8.2.3 Factory Service Shipping Instructions .........................

21

2.7

Connect to AC Mains...........................................................

10

 

8.2.4 Packing Instructions.....................................................

21

2.8

Protecting Your Speakers ....................................................

10

 

8.2.5 Estimate........................................................................

21

2.9

Startup Procedure............................................................ ...

10

 

8.2.6 Payment of Non-Warranty Repairs................................

21

3 Operation .......................................................

11

9

Warranty .......................................................

22

3.1

Precautions...........................................................................

11

Crown Factory Service Information Form ..........................................

25

3.2

Front Panel Controls and Indicators .....................................

12

 

 

 

3.3

Back Panel Controls and Connectors....................................

13

 

 

 

page 4

Operation Manual

Xs Series Power Amplifiers

Xs500

1 kHz

Power*

2-ohm Dual (per ch.)

750W**

4-ohm Dual (per ch.)

500W

8-ohm Dual (per ch.)

400W

4-ohm Bridge

1,600W**

8-ohm Bridge

1,450W

*1 kHz Power: refers to maximum average power in watts at 1kHz with 0.15% THD.

** at 0.5% THD.

Xs700

1 kHz

Power*

2-ohm Dual (per ch.)

900W**

4-ohm Dual (per ch.)

750W

8-ohm Dual (per ch.)

450W

4-ohm Bridge

1,900W**

8-ohm Bridge

1,645W

*1 kHz Power: refers to maximum average power in watts at 1kHz with 0.15% THD.

** at 0.5% THD.

Xs900

1 kHz

Power*

2-ohm Dual (per ch.)

1,200W**

4-ohm Dual (per ch.)

900W

8-ohm Dual (per ch.)

600W

4-ohm Bridge

2,500W**

8-ohm Bridge

2,100W

*1 kHz Power: refers to maximum average power in watts at 1kHz with 0.15% THD.

** at 0.5% THD.

1 Welcome

The Xs Series of power amplifiers from Crown® represents a new era in affordable, quality power amplification. The line consists of four models, each in a uniform, rugged chassis. The Xs Series incorporates the best of tried-and- true design principles and innovative features.

Modern power amplifiers are sophisticated pieces of engineering capable of producing extremely high power levels. They must be treated with respect and correctly installed if they are to provide the many years of reliable service for which they were designed.

In addition, Xs Series amplifiers include a number of features which require some explanation before they can be used to their maximum advantage.

Please take the time to study this manual so that you can obtain the best possible service from your amplifier.

Xs1200

1 kHz

Power*

2-ohm Dual (per ch.)

1,600W**

4-ohm Dual (per ch.)

1,100W

8-ohm Dual (per ch.)

650W

4-ohm Bridge

3,000W**

8-ohm Bridge

2,300W

*1 kHz Power: refers to maximum average power in watts at 1kHz with 0.15% THD.

** at 0.5% THD.

1.1 Features

Housed in a rugged, all-steel 2U chassis.

Efficient forced-air fans prevent excessive thermal buildup.

Models have touch-proof binding post outputs, Speakon®outputs, Phoenix-style inputs, and electronically balanced XLR-1/4" combo inputs with daisy-chain XLR outputs.

Features precision detented level controls, power switch, and eight LEDs which indicate signal and clip for each channel, AC mains, power, bridge mode, temperature and fault conditions.

Microprocessor-controlled protection system.

Three-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications.

1.2 How to Use This Manual

This manual provides you with the necessary information to safely and correctly setup and operate your amplifier. It does not cover every aspect of installation, setup or operation that might occur under every condition. For additional information, please consult Crown’s

Amplifier Application Guide (available online at www.crownaudio.com), Crown Technical Support, your system installer or retailer.

We strongly recommend you read all instructions, warnings and cautions contained in this manual. Also, for your protection, please send in your warranty registration card today. And save your bill of sale — it’s your official proof of purchase.

Operation Manual

page 5

2 Setup

page 6

Xs Series Power Amplifiers

2.1 Unpack Your Amplifier

Please unpack and inspect your amplifier for any damage that may have occurred during transit. If damage is found, notify the transportation company immediately. Only you can initiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shipper’s inspection.

We also recommend that you save all packing materials so you will have them if you ever need to transport the unit. Never ship the unit without the factory pack.

YOU WILL NEED (not supplied):

Input wiring cables

Output wiring cables

Rack for mounting amplifier (or a stable surface for stacking)

WARNING: Before you start to set up your amplifier, make sure you read and observe the Important Safety Instructions found at the beginning of this manual.

19 In.

48.3 cm

17.14 In.

43.5 cm

Figure 2.1

Dimensions

2.2 Install Your Amplifier

CAUTION: Before you begin, make sure your amplifier is disconnected from the power source, with the power switch in the “off” position and all level controls turned completely down (counterclockwise).

Use a standard 19-inch (48.3 cm) equipment rack (EIA RS-310B). See Figure 2.1 for amplifier dimensions.

You may also stack amps without using a cabinet.

NOTE: When transporting, amplifiers should be supported at both front and back.

3.5 In.

8.9 cm

2.3 Ensure Proper Cooling

When using an equipment rack, mount units directly on top of each other. Close any open spaces in rack with blank panels. DO NOT block front, rear or side air vents. The side walls of the rack should be a minimum of two inches (5.1 cm) away from the amplifier sides, and the back of the rack should be a minimum of four inches (10.2 cm) from the amplifier back panel.

Figure 2.2 illustrates standard amplifier airflow.

Figure 2.2 Airflow

Operation Manual

Crown XS-1200, XS-500, XS-700, XS-900 Owners manual

Xs Series Power Amplifiers

2Setup

2.4Choose Input Wire and Connectors

Crown recommends using pre-built or professionally wired balanced line (two-conductor plus shield), 22-24 gauge cables and connectors. At the amplifier inputs, use either:

3-pin male XLR cable ends,

TRS or TS 1/4" phone plugs, or

Phoenix-style connectors.

Unbalanced lines may be used, but may result in noise over long cable runs.

Figure 2.3 shows XLR wiring, Figure 2.4 shows 1/4" phone plug wiring, and Figure 2.5 shows Phoenix-style connector wiring.

NOTE: Custom wiring should only be performed by qualified personnel.

2.5 Choose Output Wire and Connectors

Crown recommends using pre-built or professionally wired, highquality, twoor four-conductor, heavy gauge speaker wire and connectors. You can use banana plugs, spade lugs, or bare wire for your output connectors (Figure 2.6). Also, you can use a 4- pole Speakon® connector (Figure 2.7 and Table 1). To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.

Note: Binding post outputs on European models come with safety plugs installed to prevent European powercord plugs from being inserted. The top & bottom entry positions for these connectors should therefore be used with European models.

Using the guidelines below, select the appropriate size of wire based on the distance from amplifier to speaker.

Distance

Wire Size

up to 25 ft.

16 AWG

26-40 ft.

14

AWG

41-60 ft.

12

AWG

61-100 ft.

10

AWG

101-150 ft.

8

AWG

151-250 ft.

6

AWG

CAUTION: Never use shielded cable for output wiring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2.3

 

 

Figure 2.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Combo Input Connector XLR

 

 

 

 

 

Wiring, Balanced (Top) and

Combo Input Connector 1/4"

 

 

 

 

Unbalanced (Bottom)

Phone Wiring, Balanced (Top)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and Unbalanced (Bottom)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2.6

Binding Post Output Wiring

Figure 2.5

Phoenix-Style Input Connector Wiring,

Balanced (Top) and Unbalanced (Bottom).

Note Jumper Between “S” and “–”

Figure 2.7

Left: Speakon®Output Connector on Back Panel Right: Speakon®Cable Connector

TABLE 1: OUTPUT ASSIGNMENT

PIN

 

CH

 

 

 

1+

 

2

 

 

 

1–

 

2

 

 

 

2+

 

NC

 

 

 

2–

 

NC

 

 

 

 

CH 2

 

 

 

PIN CH

1+ 1

1– 1

2+ 2

2– 2

CH 1

Operation Manual

page 7

Xs Series Power Amplifiers

2 Setup

2.6 Wire Your System

2.6.1 Stereo Mode

Typical input and output wiring is shown in Figures 2.8 and 2.9.

INPUTS: Connect input wiring for both channels.

OUTPUTS: Connect speakers to the 5-way binding posts or to the two Speakon® connectors. See the details below.

Connection to 5-way binding posts:

1.Connect speaker 1 positive (+) lead to the amp’s Channel-1 positive (red) binding post.

2.Connect speaker 1 negative (–) lead to the amp’s Channel-1 negative (black) binding post.

3.Connect speaker 2 positive (+) lead to the amp’s Channel-2 positive (red) binding post.

4.Connect speaker 2 negative (–) lead to the amp’s Channel-2 negative (black) binding post.

Connection to Speakon® connectors:

1.Connect speaker 1 positive (+) lead to the amp’s Channel-1 Speakon® terminal 1+.

2.Connect speaker 1 negative (–) lead to the amp’s Channel-1 Speakon® terminal 1–.

3.Connect speaker 2 positive (+) lead to the amp’s Channel-2 Speakon® terminal 1+.

4.Connect speaker 2 negative (–) lead to the amp’s Channel-2 Speakon® terminal 1–.

2.6.2 How to Parallel the Inputs

There are three ways to feed the same signal to each amplifier channel:

1.Buy a “Y” cable. Plug the female end into your signal cable, and plug the split male ends into both amplifier inputs.

2.Feed your signal to the Channel-1 input (either Phoenix or combo). Connect a jumper wire (Figure 2.9) between the Phoenix Channel-1 (+) screw terminal and the Channel-2 (+) screw terminal. Connect another jumper wire between the Channel-1 (–) screw terminal and the Channel-2 (–) screw terminal.

3.Feed your signal to the Channel-1 Phoenix terminals. Using a mic cable or phone-to-phone cable, connect Channel-1 combo jack to Channel-2 combo jack.

CHANNEL 2

CHANNEL 1

Figure 2.9

Phoenix Connector Wiring for

Parallel Inputs

Figure 2.8

Stereo Wiring

page 8

Operation Manual

Xs Series Power Amplifiers

2Setup

2.6.3Bridge-Mono Mode

Typical input and output wiring is shown in

Figure 2.10.

NOTE: Crown provides a reference of wiring pin assignments for commonly used connector types in the Crown Amplifier Application Guide available at www.crownaudio.

OUTPUTS: Connect the speaker across the red binding posts of each channel. Do not use the black binding posts when the amp is being operated in Bridge-Mono mode.

IMPORTANT: Set the Bridge/Normal switch to “Bridge.”

NOTE: In Bridge-Mono mode, only the

Channel 1 Level control is functional.

Figure 2.10 Bridge-Mono Wiring

Operation Manual

page 9

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