Crown 14-M, 28-M Owners manual

Commercial Audio Series

Operation Manual

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MASTER 1 MASTER 2

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Obtaining Other Language Versions:

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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.

POWER

14M

POWER

28M

Some models may be exported under the name Amcron.

138097-3

12/05

Important Safety Instructions

Commercial Audio Series Mixers

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.

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.

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Operation Manual

Commercial Audio Series Mixers

Crown International, Inc.

Issued By: Crown International, Inc.

1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.

European Representative’s Name and Address:

Nick Owen 35, Bassets Field Thornhill Cardiff. South Glamorgen CF14 9UG United Kingdom

Equipment Type: Commercial Audio Series Family Name: Mixers Model Names: 14M, 28M

EMC Standards:

EN 55103-1:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 1 M EN 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current 16A per phase) EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current 16A EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B EN 55103-2:1997 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity EN 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A) EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:2001 Surge Immunity (Criteria B) EN 61000-4-6:2003 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A) EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation

Safety Standard: IEC 60065: 2002 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus CAN/CSA-E60065-03 7th Ed. Audio, Video and Similar Electronic Apparatus-Safety Requirements UL 60065 7th Ed. Audio /Video and Musical Instrument Apparatus for Household, Commercial and Similar General Use.

DECLARATION of CONFORMITY

FOR COMPLIANCE QUESTIONS ONLY:

Sue Whitfield 574-294-8289 swhitfield@crownintl.com

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

Date of Issue: Nov. 1, 2004

Operation Manual

Larry Coburn

Title: Senior Vice President of Manufacturing

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

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Table of Contents

Commercial Audio Series Mixers

Important Safety Instructions .......................................................2

Declaration of Conformity ............................................................3

1 Welcome ................................................................................5

1.1 Features ...........................................................................5

1.2 Front Panel Controls and Indicators................................6

1.3 Back Panel Controls and Connectors................................7

2 Setup ......................................................................................8

2.1 Installation........................................................................8

2.2 How to Attach Rack Ears ...................................................8

2.3 Choose Input Wire and Connectors .................................9

2.4 Choose Output Wire and Connectors ...............................9

2.5 Wire Your System ............................................................10

2.6 Input Routing....................................................................11

2.7 Phantom Power................................................................11

2.8 Priority Muting.................................................................11

2.9 Four-Tone Generator.........................................................12

2.10 Powering Up...................................................................12

2.11 Included Accessories......................................................12

2.12 Block Diagram................................................................13

3 Troubleshooting .................................................................. 14

4 Specifications ..................................................................... 15

5 Service ... .............................................................................. 16

5.1 International and Canada Service ...................................16

5.2 US Service .....................................................................16

5.2.1 Service at a US Service Center .............................. 16

5.2.2 Factory Service ......................................................16

5.2.3 Factory Service Shipping Instructions ................... 16

5.2.4 Packing Instructions............................................... 16

5.2.5 Estimate Approval................................................... 16

5.2.6 Payment of Non-Warranty Repairs..........................16

6 Warranty .............................................................................. 17

Warranty Registration.................................................................. 19

Crown Factory Service Information Form .....................................23

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Operation Manual

Commercial Audio Series Mixers

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1 Welcome

The Crown® 14M and 28M are high-value mixers for commercial and industrial audio. The mixers are part of Crown’s Commercial Audio Series, which also includes mixer-amplifiers and power amplifiers. These low-cost units provide all necessary features in a simple building-block format.

The 14M has 4 inputs and 1 output channel. The 28M has 8 inputs and 2 output channels.

Some applications include schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Typical uses are paging, background music, security and evacuation instructions.

1.1 Features

• 4 or 8 inputs, 1 or 2 line outputs

• Ideal for commercial and industrial use

• Expandable by adding Crown Commercial Audio mixer-amps or Commercial Audio power amplifiers

• Balanced Phoenix-type mic/line inputs; RCA inputs

• Balanced Phoenix-type line outputs

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• Any input can be sent to any output

• Built-in tone generator

• Independent Bass and Treble controls on each input

• Priority muting

• Protected by a fuse

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

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1 Welcome

Commercial Audio Series Mixers

1.2 Front Panel Controls and Indicators

A. Input Signal Presence Indicator

Green LED, one for each input channel, illuminates when input signal exceeds –24 dBu (line) or –70 dBu (mic).

B. Input Volume Controls

Microphone/line, four in 14M, eight in 28M. Detented potentiometers with knobs.

C. Output Volume Controls

One per output channel. Detented potentiometer with knob.

D. Output Signal Presence Indicator

Green LED, one for each output channel, illuminates when output signal level exceeds 100 mV.

E. Clip Indicator

Red LED, one per output channel, illuminates at threshold of audible distortion.

F. Power Indicator

Blue LED indicates power on.

G, H. Tone Controls

Bass and Treble non-detented potentiometers on each input channel. Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz.

I. Power Switch

Pushbutton on-off switch. The power switch does not affect the 24V DC auxiliary power input (letter “K” on next page).

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Figure 1.1 Front Panel Controls and Indicators

Operation Manual

Commercial Audio Series Mixers

1 Welcome

1.3 Back Panel Controls and Connectors

J. AC Power Inlet

Detachable IEC.

K. Mixer Config Switch

A DIP switch with two functions:

1. Assigns one of the inputs as the priority input for each output, thereby temporarily muting the remaining inputs. Muting is activated by contact closure.

2. Global enable switch for phantom power. Does not affect RCA inputs. Default position is off.

L. Input Routing Switch (28M only)

DIP switches that assign each input signal to each output. Two switches per input.

M. Tone Level

One potentiometer per output channel sets the volume of the tones. Tone level is not affected by output volume controls.

The Pre-Announce Chime is a special case. It is mixed with Channel-1 signals, so its level will be affected by the master volume control.

N. Mic/line Switch

Selects mic-level or line-level input signals. One switch for each balanced input.

O. Dual RCA Input Connector

For stereo music signals, unbalanced, summed together, two connectors per input channel. If required, both the mic/ line and RCA inputs may be used at the same time. The mic/ line gain switch does not affect the RCA gain, which is fixed relative to mic/line. The mic/line and RCA signals are mixed. Note: Other equipment connected to the RCA jacks should be connected to the same AC power source as the mixer to avoid hum.

P. Mic/Line Input Connector

3-pin Phoenix-type, balanced, one per input channel.

Q. Fuse

Protects the power supply.

R. Priority Connector

3-pin Phoenix-type connector allows Input 1 or Input 5 (28M only) to mute other input signals by contact closure.

S. Auxiliary Power Input

2-position terminal strip for 24 VDC (±10%) backup power. Accepts up to 10 AWG terminal forks. NOTE: To prevent a spark when attaching a battery, have unit turned on and connected to the mains supply.

T. Line Out Connector

One 3-pin balanced Phoenix-type connector per output channel. Level controlled by master volume control.

U. Tone Generator Connector

5-pin Phoenix-type connector. Tones include Pre-Announce Chime, Bell, Alert Tone, and Evacuate Tone. All tones are activated by contact closures on the connector.

Operation Manual

Figure 1.2 Back Panel Controls and Connectors (28M shown)

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2 Setup

Commercial Audio Series Mixers

2.1 Installation

CAUTION: Before you begin, make sure your mixer 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 mixers without using a cabinet, or you may place a single mixer on a surface.

NOTE: When transporting in a rack, mixers should be supported at the front and back.

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 mixer back panel.

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2.2 How to Attach Rack Ears

1. Locate the two rack ears supplied.

2. See Figure 2.2. Remove the two screws from each side of the chassis near the front.

3. Place a rack ear flush with the right front of the chassis.

4. Insert a screw that you removed into the bottom hole of the rack ear and chassis. Screw it in.

5. Insert a screw that you removed into the top hole of the rack ear and chassis. Screw it in.

6. Repeat steps 3-5 for the left side of the chassis.

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MASTER 1

17.3 In.

43.8 cm

Figure 2.2 How to Connect Rack Ears

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MASTER 2

1.7 In.

4.3 cm

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10.7 In.

27.18 cm

11.9 In.

30.2 cm

Figure 2.1 Dimensions

Operation Manual

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