Peavey CS-900 User Manual

INSTALLATION AND CONNECTION
Tn© Peavey CS-900 Commercial Series Power Amplifier is designed for durability m commercial installations and the quality of
performance required in studio and home applications. The CS-900 is a dual-channel power amplifier capable of delivering more than 450
wattsRMSperchannef ir»toa4ohm load continuously (both channels). The unit is of the standard 19" rack mount configuration requiring 7"
rack height and is cooled by an automatic two-speed internal fan. All inputs and outputs are on the back panel. The front panel contains
various LED indicators tor power output level, DDT activation and thermal shutdown, detented/callbrated sensitivity controls and a
heavy-duty mams power switch.
Mains Power Source
TheCS-900i8fittedwlthasingleheavy-duty#14 AWG.three-conductorJinecordand aconventionalAC plug with aground pin. It should
be connected toaci rcu it capable of supporting at least 10 amps continuously or greater. This is particularly critical for sustained high power
applications. If the socket used does not have a ground pin, a suitable ground lift adaptor should be used and the third wire grounded
properly. Never break off Ihe ground pin on the CS-900. The use of an extension cord should be avoided, but if necessary, always use a
three-wire type with at least a#14 AWG wire size. The useofa lighter wire wllfseverely limit the power capability oflhisamplifier. Always use
a qualified electrician to Install any necessary electrical equipment, To prevent the risk of shock or fire hazard, always check to seethatthe
amp Is properly grounded.
Industrial and Commercial Installations
Forcommerciaiandotherinstailaiionswheresustamed high power operation is recurred, th© amplifiers should b© mounted m a standard
19" rack. It is not necessary to leave rack space between each ampi if ier In the stack since the fan pul Is air in from the rear and exhausts Ihe hot
airoulthe front. An adequate cool air supply must be provided for the amplifiers when rack mounted. The internal fan must have a source of
air that is not preheated by other equipment. The amplifier will start up in low speed fan operation and will normally slay at low speed
operation unless sustained high power operating levels vvere to occur. Then as the amplifier heal sinks heat up, the automatic thermal
sensing circuitry will cause high speed operation to occur. Depending upon signal conditions and amp loading, highspeed fan operation
may continue or it may cycle continuously between high and low.Thissituation isquite normal. If cooling is Inadequate due to preheated air
ora reduction of air flow occurs due to blockage of the amplifier inlet/ou tiet ports or if the ampI if ier is severely overloaded or short-circuited,
then the amplifierthermal sensing system may cause temporary shutdown ofthatparticularchannel.This is indicated bytheillumindtionof
the front panel high temperature LED Depending upon available cooling air. operation should be restored in ihai channel relatively quickly.
In any event, corrective action should be taken todetermine the causeof thethermai shutdown. If the amplifier is not severely overloaded or
shorted andalrilow isnormaMnand out ofthe amplifier, then steps should be taken to provide a coolerenvironmentforalith© amplifiers. Asa
general rule, the cooler electrcmc ©quiprpent i© operated, the longer its useful service life. You have invested in the finest equipment that
money can buy, and a little care will insure long and reliable operation.
Portable Peck Mount Applicalions
Duetotheweighlof the CS-900. we highly recommend that additonal support be provided atthe back panel ofthe amplifier whenever one
ormoreunitsare Installed In a portable rack mountconfiguration. Forthie purpose, two V<-20 alien head bolts {19) have been provided at the
rearofineGS-900. These bolts should beattachedtoasuitabfebracketingarrangementloprovid© this additional support. AUo. two guards
have bean provided on the rear pane! of the CS-900 to protect connectors, PL cans, and provide a means for routing cables. CAUTION:
These are not handles and they should not be used to lifi the unit.
Studio and Home Installallon
In most low to medium power epplicalions, the power amplifier can be mounted in any configuration. It is desirable that, if stall possible,
the power amplifier be located at the top of an equipment stack. This will prevent possible overheating of sensitive equipment by the hot air
rising from the power amplifier. As a general rule, most home and studio requirements will never cause high speed fan operation If it does,
however, this may indicate that you have not taken the necessary steps to provide adequalecooiing. Remember-closed up in acabinet. the
CS-900 will haveseverecooling problems, even at low power levels. Again, inadvertent short circuit or sustained overload usage could also
cause temporary thermal shutdown.
Input Connections
AM input connections are made ai the rear panel. The two 'A ' jacks marked Power Amp Input {15) are wired in parallel for ease of
connecting to each channel. The dual (parallel) jacks allow daisy-chainmg to additional channels. If RCA-type pin jacks are required, a
suitable adaptor can be used. Shielded cables must be usedtomihimize hum and noise pickup, The nominal input irT]pedanceis20K ohms.
This impedance rep resents a bridging load to the associated driving equipmentand is compatible with the load requirements of most home
stereo devices. The CS-900 has an input sensitivity of 1.4V RMS (*3dBV) for rated output with the front panel sensitivity control set at full
clockwise, again allowing complete compatibility in home appMcattons. This sensitivity rating increases as the control is turned counter¬
clockwise The new sensitivity rating is indicated by the setting of the calibrated sensitivity control. It is generally wise lo operate the
sensitivity control at Us full clockwise setting. The sensitivity control is discussed in greater detail laler in this manual.

Peavey CS-900 Specifications

General

Brand	Peavey
Model	CS-900
Category	Amplifier
Language	English