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1

Save the carton and packing materials!

Should you ever need to ship the unit,
use only the original factory packing.

For replacement packaging, call Crest Audio’s
Customer Service Department directly.

2

Read all documentation before
operating your equipment.

Retain all

documentation for future reference.

3

Follow all instructions printed on
unit chassis for proper operation.

4

Never hold a power switch or cir-
cuit breaker in the on-position, if
it won’t stay there by itself! 

5

Do not use the unit if the electrical
power cord is frayed or broken.

The power supply cords should be
routed so that they are not likely to be
walked on or pinched by items placed
upon or against them.

6

Always operate the unit with the
AC ground wire connected to the
electrical system ground.

Precautions

should be taken so that the means of
grounding of a piece of equipment is not
defeated.

7

Damage caused by connection to
improper AC voltage is not covered
by any warranty.

Mains voltage must be

correct and the same as that printed on
the rear of the unit.

8

Do not ground any hot 

(

red

)

terminal.

Never connect a hot 

(

red

)

output to

ground or to another hot 

(

red

)

output!

9

Power down and disconnect units
from mains voltage before making
connections.

0

Do not drive the inputs with a sig-
nal level greater than that
required to enable equipment to
reach full output.

¡

Do not run the output of any ampli-
fier channel back into another
channel’s input.

Do not parallel- or series-connect
an amplifier output with any
other amplifier output.

Crest Audio is not responsible for damage
to loudspeakers for any reason.

Ô

Do not connect the inputs or out-
puts of amplifiers to any other
voltage source:

such as a battery,

mains source, or power supply, regard-
less of whether the amplifier is turned
on or off.

£

Connecting amplifier outputs to
oscilloscopes or other test equip-
ment while the amplifier is in bridged
mono mode may damage both the
amplifier and test equipment!

¢

Do not spill water or other liquids
into or on the unit, or operate the
unit while standing in liquid.

ˆ

Do not block fan intake or
exhaust ports.

Do not operate equipment on a
surface or in an environment
which may impede the normal
flow of air around the unit:

such as

a bed, rug, weathersheet, carpet, or
completely enclosed rack.

§

If the unit is used in an extremely
dusty or smoky environment:

the

unit should be periodically blown free of
foreign matter.

Do not use the unit near stoves,
heat registers, radiators, or other
heat producing devices.

ƒ

The power cord of equipment
should be unplugged from the out-
let when left unused for a long peri-
od of time.

Service Information

Do not remove the cover! 

Removing the cover will expose you to
potentially dangerous voltages.There are
no user serviceable parts inside.

Equipment should be serviced by
qualified service personnel when:

A.

The power supply cord or the plug has
been damaged.

B.

The equipment has been exposed to rain.

C.

The equipment does not appear to oper-
ate normally, or exhibits a marked change in
performance.

D.

The equipment has been dropped, or the
enclosure damaged.

To obtain service:

contact your nearest Crest Audio
Service Center, Distributor, Dealer,
or Crest Audio at 201.909.8700 

USA 

or visit www.crestaudio.com for addi-
tional information.

email

techserve

@

crestaudio.com

This equipment conforms to EN55022 Class A. In a
domestic environment this product may cause radio
interference in which case the user may be required to
take adequate measures.

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 interfer-
ence in a residential installation.This equipment gener-
ates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communi-
cations. 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
the receiver.
*Connect the equipment into an outlet on a circuit dif-
ferent from that to which the receiver is connected.
*Consult the dealer or an experienced radio/TV techni-

cian for help.

This symbol is used to alert 
the operator to follow important 
procedures and precautions 
detailed in documentation.

This symbol is used to warn operators
that uninsulated “dangerous voltages”
are present within the equipment enclo-
sure that may pose a risk of electric 
shock.

important precautions

Содержание CD 1500

Страница 1: ...CD Power Amplifier Owner s Manual CD ...

Страница 2: ... symbole est utilisé dans ce manuel pour indiquer à l utilisateur la présence d une tension dangereuse pouvant être d amplitude suffisante pour constituer un risque de choc électrique Ce symbole est utilisé dans ce manuel pour indiquer à l utilisateur qu il ou qu elle trouvera d importantes instructions concernant l utilisation et l entretien de l appareil dans le paragraphe signalé ATTENTION Risq...

Страница 3: ... Shock Hazard and Grounding Connect only to a power supply of the type marked on the unit adjacent to the power supply cord 16 If this product is to be mounted in an equipment rack rear support should be provided 17 Exposure to extremely high noise levels may cause a permanent hearing loss Individuals vary considerably in susceptibility to noise induced hearing loss but nearly everyone will lose s...

Страница 4: ... or smoky environment the unit should be periodically blown free of foreign matter Do not use the unit near stoves heat registers radiators or other heat producing devices ƒ The power cord of equipment should be unplugged from the out let when left unused for a long peri od of time Service Information Do not remove the cover Removing the cover will expose you to potentially dangerous voltages Ther...

Страница 5: ...eatures overview p 9 front panel rear panel operation modes p 15 stereo parallel bridged connections p 17 input output safety p 21 tourclass protection precautions user responsibility service and support p 25 support contact us registration specifications p 27 block diagram p 28 optional handle installation p 29 wire gauge charts p 30 b c d a contents appendices ...

Страница 6: ...are broken down into steps 1 2 3 warnings indicators tips see see refers to other sections of the manual containing supplementary information on the current topic or a related issue note note supplementary feature information Preferred methods Helpful hints Feature insights Procedures not to attempt Issues or hazards to keep in mind when operating the equipment a What to look for on the equipment ...

Страница 7: ...id power supply A traditional linear power supply is used in the CD Series Because of the amplifier section s efficiency approx 80 the transformer does not need to be as big or as heavy This gives the CD Series an advantage in deliver ing more power in a more compact package The efficiency of the output stage also gives the power supply the ability to handle heavy duty cycles without compromising ...

Страница 8: ......

Страница 9: ... 2 unpacking mounting cooling and ventilation powering maintenance what to do with the shipping carton proper rack mounting technique keeping the amplifier cooled required AC line voltages routine maintenance practices ...

Страница 10: ...ntage of the original factory packing materials in order to avoid unnecessary damage mounting All CD Series amplifiers mount in standard 19 inch racks and occupy two rack spaces Four front panel mounting holes are provided on each amplifier Rear mounting ears give additional support and use of rear supports is highly recommended in all mobile and touring sound systems Handles are available as an o...

Страница 11: ...rcuit will activate and open the output relays allowing the amplifier to cool to a safe temperature Normal operation will resume once the amplifier cools to a safe level Thermal protect activation only occurs under extreme thermal conditions and is not part of normal operation powering Unless otherwise specified when ordered CD amplifiers are supplied factory set to following voltage options Optio...

Страница 12: ......

Страница 13: ...p 9 features overview 3 front panel rear panel location of connectors and controls legend of panel symbols ...

Страница 14: ...p 10 CD owner s manual features overview 3 CD shown 1 2 3 4 7 5 6 9 8 ...

Страница 15: ...tions checked for shorts and proper load impedance If overheating is suspected allow the amplifier to cool and check that the airflow is not impeded 4ACL IGM This Red LED illuminates when either theACL or IGM protection circuitry is engaged See Section 6 Tourclass Protection for more information on these Crest exclusive features 5 24 18 6 0dB The first three LEDs 24 18 6 are Green and the last led...

Страница 16: ...he speed of the fan during high temperature conditions Air enters through the rear of the amp and exits through the front grill Be sure to allow adequate air flow from the rear of the rack the amp is mounted in rear panel legend input connection XLR connector polarity TRS connector polarity bridged mono mode parallel mode stereo mode chassis ground lifted position chassis ground grounded position ...

Страница 17: ... for Stereo Parallel or Bridged Mono operation The default factory setting is Stereo See operation modes 8 Input sensitivity switch This three position switch allows the user to select the input sensitivity to 775v 0 dBu X20 or X40 for full rated output power The default factory setting is X20 Never connect a hot red output to ground or to another hot red output a Do not adjust the mode selection ...

Страница 18: ......

Страница 19: ...p 15 operation modes 4 stereo parallel bridged choosing the appropriate mode switching between operation modes special considerations when using bridged mode ...

Страница 20: ...of each other bridged Bridged mode straps both amplifier channels together to make a single channel monaural amplifier One channel pushes and the other pulls equally increasing the power output over that of either channel alone see Specifications Signal is applied to the ChannelA input only Channel A s attenuator is used to control signal level Use extreme caution when operating the amplifier in B...

Страница 21: ...p 17 connections 5 input XLR 1 4 TRS Combi output Binding Posts Speakons proper wiring schemes for connectors speakon binding post correct signal paths stereo parallel and bridged ...

Страница 22: ... see operation modes Very high current is available at the outputs Please connect your output cable to the and terminals of each sec tion precisely as shown a stereo parallel female XLR bridged mono TRS pinouts A and B channel Speaker to PIN 1 Speaker to PIN 1 A channel also has B channel to PIN 2 B channel to PIN 2 Note This is useful in bi amp monitor situations A Channel ONLY Speaker to PIN 1 S...

Страница 23: ...p 19 connections 5 2 3 1 2 1 3 2 3 1 2 1 3 2 3 1 2 1 3 stereo mode five way binding post connectors parallel mode five way binding post connectors bridged mono mode five way binding post connectors ...

Страница 24: ...r to PIN 1 Speaker to PIN 2 2 1 2 stereo mode speakon output connectors parallel mode speakon output connectors bridged mono mode speakon output connectors CD owner s manual connections 5 The Channel A Speakon has the signal from channel B present on PIN 2 and Pin 2 This is handy in situations where the output is dri ving bi amped monitors a ...

Страница 25: ...p 21 safety 6 user responsibility speaker protection TourClass the owner s role in amplifier safety protecting your speakers description of TourClass protection features ...

Страница 26: ...ied to the speakers The amplifier will however allow normal musical transient bursts to pass Of course when the amplifier does clip it is operating at its maximum output power Note that some speaker systems are packaged with proprietary processors that have power limiting circuits and therefore should not require additional limiting Do not drive any low frequency speaker enclosure with frequencies...

Страница 27: ... the channel gain to a safe level This gain control circuit is inaudible in normal use In addition if extreme and sustained low impedance is encountered the amplifier s output relay will open AutoRamp Auto Ramp operates every time the amplifier is turned on or is reactivated after a protect condition is corrected This exclusive CrestAudio feature gradually increases gain to the atten uator setting...

Страница 28: ......

Страница 29: ...p 25 service and support 7 when to get support ways to contact CrestAudio support contact us ...

Страница 30: ...e Crest Audio offices For those with Internet access please visit the CrestAudio web site contact us customer service phone 201 909 8700 USA fax 201 909 8744 USA email customerserve crestaudio com technical support phone 201 909 8700 USA fax 201 587 0550 USA email techserve crestaudio com web site www crestaudio com mail CrestAudio Inc 16 00 Pollitt Drive Fair Lawn NJ 07410 USA For replacement pac...

Страница 31: ...Hz 1 1dB 20Hz 20kHz 1 1dB 400 1 8Ω 400 1 8Ω 400 1 8Ω 400 1 8Ω 60dB 1 kHz 60dB 1 kHz 60dB 1 kHz 60dB 1 kHz 0 775V X20 X40 0 775V X20 X40 0 775V X20 X40 0 775V X20 X40 20K balanced 20K balanced 20K balanced 20K balanced 10K unbalanced 10K unbalanced 10K unbalanced 10K unbalanced 100dB 100dB 100dB 100dB 60dB 1kHz below rated power 60dB 1kHz below rated power 60dB 1kHz below rated power D D D D 10A 12...

Страница 32: ... 3 Pin XLR Channel A Outputs 5 Way Binding Posts Neutrik Speakon 5 Way Binding Posts Neutrik Speakon Channel B Inputs Channel B Outputs SEE SECTION 5 FOR OUTPUT CONNECTION DETAILS GAIN SWITCH 0 775V 0 775V X20 X40 X20 X40 A B VU METER THERMAL ACL IGM DC PROTECT AUTORAMP OUTPUT RELAY OUTPUT RELAY VU METER THERMAL ACL IGM DC PROTECT AUTORAMP CD owner s manual block diagram b ...

Страница 33: ...29 The CD amplifiers can be outfitted with optional handles This option requires 2 CD series handles P N C32000010 and 4 8 32 1 2 undercut flat head screws P N C38000008 You may order these from your dealer or directly from Crest Audio ...

Страница 34: ...0 55 0 37 8 2 5 6 2 9 1 74 1 09 0 73 15 5 10 8 5 6 3 4 2 2 1 45 0 5mm2 0 75 1 5 2 5 4 6 8 24 5 6 2 9 1 74 1 09 0 73 5 5 10 8 5 6 2 9 1 74 1 09 28 19 9 10 8 6 7 4 3 2 9 0 75mm2 1 5 2 5 4 6 10 15 5 8 2 5 1 3 2 2 2 1 31 0 73 15 5 9 8 6 3 4 3 2 6 45 28 18 2 12 0 8 2 5 1 2 meters 5 meters 10meters 30meters wire gauge power loss 8 Ω load 4 Ω load 2 Ω load wire gauge d CD owner s manual ...

Страница 35: ... 1 02 0 64 0 40 0 25 3 2 2 0 1 28 0 80 0 51 6 2 4 0 2 5 1 60 1 01 18AWG 16 14 12 10 8 6 2 4 0 2 5 1 60 1 01 0 60 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 18AWG 16 14 12 10 8 11 9 7 7 5 0 3 2 2 0 1 20 22 14 6 9 6 6 2 4 0 2 4 37 26 17 8 11 8 7 7 4 7 5feet 10feet 40feet 80feet wire gauge power loss 8Ω load 4Ω load 2Ω load wire gauge d ...

Страница 36: ...http www crestaudio com CDOwner s Manual Version 1 1 10 14 04 P N 80305114 ...

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