Crown Audio 140MPA User Manual

Commercial Audio Series

Operation Manual

Obtaining Other Language Versions:

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:

property of their respective owners.

Crown, Crown Audio and Amcron are registered trademarks of Crown International. Other trademarks are the

To obtain information in another language about the use of this product, please contact your

Some models may be exported under the name Amcron.

®

140MPA

©2006 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: [phone]

139431-2

8/06

Important Safety Instructions

Commercial Audio Series Mixer-Amplifiers

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 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.

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.

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

Commercial Audio Series mixer-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

Commercial Audio Series Mixer-Amplifiers

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 Mixer-Amplifiers
Family Name: Mixer-Amplifiers
Model Names: 140MPA

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
[e-mail]

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: Feb. 1, 2006

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.

page 3

Table of Contents

Commercial Audio Series Mixer-Amplifiers

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 ...............................10

2.5 Wire Your System ............................................................11

2.6 Phantom Power................................................................11

2.7 Link In/Out Switch ............................................................11

2.8 Remote Volume Control....................................................12

3 Operation .................................................... 13

3.1 Powering Up......................................................................13

3.2 Priority Ducking ................................................................13

3.3 Music-On-Hold.................................................................13

4 Troubleshooting................................................................... 14

5 Specification ........................................................................15

6 Service................................................................................... 16

6.1 Worldwide Service .......................................................... 16

6.2 US and Canada Service .................................................. 16

6.2.1 Service at a US or Canada Service Center ............. 16

6.2.2 Factory Service ......................................................16

6.2.3 Factory Service Shipping Instructions ................... 16

6.2.4 Packing Instructions............................................... 16

6.2.5 Estimate Approval................................................... 16

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

7 Warranty .............................................................................. 17

Product Registration................................................................... 19

Crown Factory Service Information Form .....................................21

page 4

Operation Manual

Commercial Audio Series Mixer-Amplifiers

*

1 kHz

140MPA

Minimum guaranteed power
into 4 ohms or 25V/70V output

*1 kHz Power: refers to maximum power in watts at
1 kHz with 0.5% THD.

Power

40W

1 Welcome

T he Crown® 140MPA is a high-value mixer­amplifier for commercial audio. It provides 4­ohm and constant-voltage outputs (25V and
70V). Typical uses are paging, background
music, and music-on-hold.

The unit provides 4 inputs (each with a volume
control) and a 40W amplifier output.

Other features include priority ducking, phan­tom power, and capability for remote volume
control. Multiple units can be linked.

1.1 Features

• 4 inputs (each with a volume control), one
40W amplifier output channel

• Ideal for paging, background music, and
music-on-hold

• Balanced Phoenix-type mic/line inputs, tele­phone input, dual RCA stereo music inputs,
touch-proof screw-terminal speaker outputs

• Priority ducking

• Independent bass and treble controls for
each input

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

Operation Manual

page 5

1 Welcome

Commercial Audio Series Mixer-Amplifiers

1.2 Front Panel Controls and Indicators

A. Input Signal Presence Indicator: Green LED,
one for each input channel, illuminates when input sig­nal exceeds –40 dBu.

B. Input Volume Controls: Four controls, one per
input. Detented potentiometers with knobs.

C. Master Output Volume Control: Detented poten­tiometer with knob.

D. Output Signal Presence Indicator: Green LED
illuminates when output signal level exceeds 100 mV (45
dB below full power) from the 4-ohm tap.

E. Clip Indicator: Red LED on output illuminates at
threshold of audible distortion.

F. Power Indicator: Blue LED indicates power on.
G., H. Tone Controls: Bass and Treble non-detented

recessed potentiometer on each input channel. Bass ±10
dB at 100 Hz, Treble ±10 dB at 10 kHz.

I. Power Switch: Pushbutton on-off switch.

page 6

Figure 1.1 Front Panel Controls and Indicators

Operation Manual

Commercial Audio Series Mixer-Amplifiers

1 Welcome

1.3 Back Panel Controls, Connectors and Indica­tors

J. Reset Switch: Resets the circuit breaker that protects the power
supply.

K. Amplifier Output Connector: 4-position terminal strip with
COM (Common), 4 ohms, 25V and 70V terminals. Accepts up to 10
AWG terminal forks. Non-touch cover included.

L. Preamp Line Out Connector: 3-pin balanced Phoenix-type
connector. Post master, pre-VCA. Level controlled by master volume
control.

M. Link In/Out Switch: Slide switch. When set to IN, any signal
applied to the Amp Input connector will be mixed with the input sig­nal(s). When set to OUT, only the signal from the Amp Input Connec­tor will appear at the amplifier output.

N. Amp Input Connector: 3-pin Phoenix-type, high-impedance
balanced. Used to link an additional mixer to the mixer-amplifier.
Can be used to connect an external processor.

O. Output VCA Connector: 4-pin Phoenix-type connector for two
VCA control lines of +10 VDC and ground. Compatible with Crown
1-VCAP module.

P. Music-On-Hold Section

MOH 1V Level Control: Trim pot adjusts level for Music-On-Hold 1V
output.

MOH 1W Level Control: Trim pot adjusts level for Music-On-Hold
1W output.

MOH SPI Indicator: Flashes when MOH signal is present.
MOH 1V Phoenix Connector: 3-pin Phoenix connector for 1V, 600-

ohm transformer-isolated output.
MOH 1W Phoenix Connector: 3-pin Phoenix connector for 1W out-

put.
MOH 1V RCA Connector: Two mono RCA connectors for 1V output

(in parallel with 600-ohm connections so they are isolated).

Q. Input 4 Section

Balanced Input Connector: Detachable 3-pin Phoenix style connector
for balanced line-level signals, one per input channel.

Dual RCA Input Connector: For stereo music signals, unbalanced,
summed together, two connectors per input channel.

R. Input 3 Section

Same as Input 4 Section.

S. Input 2 Section

Same as Input 4 Section.

T. Input 1 Section

Balanced Input Connector: Detachable 3-pin Phoenix style connector
for balanced mic-level or line-level signals.

Dual RCA Input Connector: For stereo music signals, unbalanced,
summed together.

Mic/line Switch: Selects mic-level or line-level signal for Input 1.
Phantom Power Switch: Turns phantom power on or off for Input 1.
Tel Connector: Transformer-isolated 600-ohm input connector,

summed into Input 1 for paging from a telephone system.

U. AC Power Inlet: Detachable IEC.

V. Priority Section

Active indicator: Illuminates when VOX ducking is active.
VOX Threshold: Trim pot controls how loud the voice must be before

ducking occurs. Can be set for no ducking.
Priority Connector: 3-pin Phoenix-type connector for push-to-talk

mic contact closure. Input 1 is the priority input for the amplified out­put, so Input 1 ducks the other inputs. Threshold of activation
depends on input voltage. Ducking does not affect MOH outputs.

Priority Release: Trim pot sets the release time of VOX ducking.

Operation Manual

Figure 1.2 Back Panel Controls, Connectors and Indicators

page 7

2 Setup

Commercial Audio Series Mixer-Amplifiers

2.1 Installation

CAUTION: Before you begin, make sure your
mixer-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 mixer-amps without using a
cabinet, or you may place a single mixer-amp on a
surface with 12 inches of air space around the unit
for convection cooling.

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

When using an equipment rack, do not mount units
directly on top of each other. Allow 2 rack units (3.5
inches) between units for convection cooling. The

side walls of the rack should be a minimum of two
inches (5.1 cm) away from the mixer-amplifier
sides, and the back of the rack should be a mini­mum of four inches (10.2 cm) from the mixer­amplifier back panel.

2.2 How to Attach Rack Ears

1. Locate the two rack ears and two rack-ear screws
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 center
hole of the rack ear and chassis. Screw it in.

6. Insert one of the supplied screws into the top hole
of the rack ear and chassis. Screw it in.

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

Figure 2.2 How to Connect Rack Ears

page 8

Figure 2.1 Dimensions

Operation Manual