Peavey CS 8OOX User Manual

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CS@

800s POWER AMPLIFIER OWNERS MANUAL

Congratulations on your purchase of the new

CS@ 800s

stereo power amplifier. This latest version is the most advanced ever, using state-of-the-art switching power supply technology to deliver high fidelity and rock solid performance in a two- rack-space unit that weighs just under 23 pounds. This new design retains the extended performance capability of the old

CS@8OOX,

awesome industry standards for power bandwidth, slew rate and distortion specifications. The new a significant improvement in damping factor specifications. Following is the new CS

l 420 W RMS into 4 ohms...600 W RMS into 2 ohms (per channel) l 840 W RMS into 8 ohms... 1200 W

l Slew Rate: 40 V/microsecond, stereo mode, each channel l Power Bandwidth: l Total Harmonic Distortion: Less than l Hum and Noise: 100 l Damping Factor: Greater than 7000

providing impressive two ohm output power capability, and maintaining the old 4 & 8 ohms ratings with

800s

specs:

F/MS

into 4 ohms (bridged)

DDP

compression with LED indicators and defeat switch

Hz to 50 KHz @ 4 ohms, 8 rated power

0.03%, 8

below rated power, unweighted

4 ohms,

rated power

700

Hz, each channel

“S”

design also reflects

The heavy transformer is replaced by an extremely reliable switching power supply that uses proven half-bridge topology to provide 1,700 watts peak power from a high-efficiency

proportional fold-back which prevents a total shut-down at extreme operating temperatures. The new CS Peavey patented

DDT’”

compression system which virtually eliminates any possibility of clipping. The new back panel

IGBT

design. The supply has a thermal monitor system with

800s

retains the

design now includes plug-in modules for both inputs and outputs offering flexible patching features and various connector choices. Two variable speed DC fans provide tremendous cooling capability upon demand.

THE AMP FEATURES

l Two rack space height-less than 17” depth l Under 23 Ibs...switching power supply l Plug-in modular inputs l Dual XLR (bal)/phone

Universal three-way crossover module

l Plug-in modular outputs l Dual phone jack and l Dual l Modular construction l Replaceable channel and power supply modules l Significant/y reduced mains turn-on surge l Two variable speed DC

l DDT activation LED l Recessed rear l /EC mains connector

SPEAKOP

Ca/ibrated/detented

jack(unbal)

iway

with “thru” output per channel

binding post per channel

Quick Connect with patchable

fans.../ower

input attenuator

power LED each channel

panel

DDT & bridge switch

noise levels

control

selection

each channel

of pin-outs

THE DIGITAL POWER SUPPLY

l Ultra reliable l Uses proven Ha/f-Bridge topology-fewer parts l 1,700 W peak power...25% over-design

/GBT

design...high efficiency

l Light weight-cost effective l Massive aluminum heat l Thermal monitor system with fold-back feature-no shut-down except fault l Effective, low-cost filter design.../ow conducted EM/ l Fully operational down to 85 V AC Mains (Domestic)...

We hope you will find your new CS

Robust

sink...greater

800s

thermal

stability

770

V AC Mains (Export)

not to be just another power amplifier, but the most exciting power amplifier you

have ever purchased. Please read over this owners manual carefully. It will help you to use this exciting product most

effectively.

FRONT PANEL

DDT’”

ACTIVE LED (1)

Illuminates when when clipping distortion is occurring.

POWER LED (2)

Illuminates when AC power is being supplied to the amp and the associated channel is operational. Illumination is delayed slightly during the power-up cycle due to the transient suppression/thermal fault circuitry. If either channel experiences fault conditions or exceeds the safe operating temperature limits, then that channel will shut down, and the associated power LED will go out indicating such conditions exist. Also, whenever the BRIDGE mode is selected, the power LED on channel B is defeated (OFF), just as if there were a fault condition on channel B. This provides a positive indication that the CS 800s is in bridge mode.

INPUT SENSITIVITY (3)

Maximum power amplifier input gain (minimum sensitivity) is achieved at the full clockwise setting. This setting yields maximum mixer/system headroom. A setting of less than full clockwise will yield lower system noise at the expense of headroom. Calibration indicates sensitivity in

POWER SWITCH (4)

Depress to “on” position to power up unit.

AIR EXHAUST PORT (5)

This is where the hot air from the heat sinks exhaust from the amplifier. Any restriction or blockage could cause excessive operation temperatures and the unit could shut down!

DDT’”

Compression is taking place. With the ENABLE/DEFEAT switch in the DEFEAT position, the LED indicates

dBV

necessary to attain the full output power rating.

REAR PANEL

CIRCUIT BREAKER (6)

The

CP’

800s uses a circuit breaker in place of the main fuse. This breaker is provided to limit the current to the digital power supply and thereby protect it from overheating and possible destruction due to fault conditions in the amplifier. The trip current value has been carefully chosen to allow continuous power output performance while still providing adequate protection for the power supply. Normally this breaker should not trip unless there is a fault in the amplifier circuitry that draws excessive mains current. However, abnormal conditions such as a short circuit on either or both channels or continuous operation at overload or clipping, especially into 2 ohm load will cause the breaker to trip. If this occurs, simply reset the breaker and correct the cause of the overload. When tripped, the button on the breaker will be outward nearly If this “thermal” type breaker does trip, then simply pushing the button back in will reset it after waiting a brief period of time to allow it to cool. If the breaker trips instantly when you attempt to reset it, the unit should be taken to a qualified service center for repair.

l/2”,

and can be reset by pushing inward. A normal reset button length is about

l/4”.

A IEC

MAINS POWER CONNECTOR (7)

The CS 800s is fitted with a universal conductor line cord with a conventional AC plug with a ground pin. This line cord should be connected to an independent mains circuit capable of supporting at least 15 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 adapter should be used and the third wire grounded properly. Never break off the ground pin on the 3 conductor line cord. The use of extension cords should be avoided, but if necessary, always use a three-wire type with at least a Always use a qualified electrician to install any necessary electrical equipment. To prevent the risk of shock or fire hazard, always be sure that the amplifier is properly grounded.

DDT’”

SWITCH (8)

This switch is used to either ENABLE or DEFEAT the

MODE SWITCH (9)

The female XLR inputs (11)

are connected to dual OP AMP circuitry which offers very low noise and extremely high common mode rejection ratio to minimize outside interference!

#14

IEC

connector. Into this connector one should always insert a heavy duty

AWG wire size. The use of lighter wire will severely limit the power capability of this amplifier.

DDT’”

compressor.

#14

AWG 3

Between the two XLR connectors is a recessed switch (13) which allows the user to select the desired polarity (phase) of the

XLR inputs. This switch is a push-push type and a small diameter “tool” is required to select the desired position. Set to the out

(default) position, the polarity is pin #3 positive, pin #2 negative, and pin #I ground. This is the polarity found on most Peavey power amplifiers. Although this is not the world “standard” (IEC) polarity, it was chosen by Peavey more than 20 years ago, and thus we offer this polarity to be consistent with products both past and present. If this amplifier is used with other competitive products which

use the IEC standard polarity, then the

#I ground. As with any electronic gear, polarity (phasing) is important because the loudspeaker enclosures associated with this

power amplifier must be in phase with any other loudspeaker enclosures associated with other power amps. If one loudspeaker system were to “push” while the other “pulls”, then a serious sound “cancellation” could result. Changing the setting of the polarity switch has the same effect as reversing the polarity of the loudspeaker connections at the output.

The female

balanced” input circuitry. When used, these

impedance circuit which is part of a “ground loop” elimination circuitry associated with the input. This feature will normally allow “hum free” operation when relatively short that share the same rack with this amp. This “quasi-balanced” circuit is “automatic”, and is virtually invisible in normal usage. It can

not be defeated.

Each channel also has a female phone jack (14) labeled “thru”. This jack offers a very flexible patching capability. When the XLR input connectors (11) are used, then this “thru” jack is the output of the electronic balanced input circuitry, and as such can be

used as a “line out” to connect to the other input jack on this amplifier or other amps in the same rack. Thus one balanced mixer feed can be connected to the amp via the XLR connector and then further distributed locally via the “thru” jack. Alternatively, when the phone jack input (12) is used as the input, then the “thru” jack becomes a “bridged” input to it (similar to a Y-cord), again allowing this

input signal to be patched to the other input jack on this amplifier or other amps in the system.

l/4”

phone jack input (12) in the center of the “combo” connectors are also connected to a unique

‘(in”

position of switch (13) should be selected yielding pin #2 positive, pin #3 negative, and pin

“quasi-

114”

jacks are not “chassis grounded” but connected to ground through a relatively low

i/4”

cable patches are made to this input from various outputs on this amp and other equipment

i/4”

Additional input modules are available from your authorized Peavey Dealer. Details of these modules and the installation instructions can be secured from this source.

THE Pl OUTPUT MODULE (15)

The standard output module shipped with each amplifier is called the Pl MODULE. It offers both dual

l/4”

jacks and each channel. For each channel, the outputs are in parallel, hence the speaker connection cables can be terminated with applications, the use of the binding post terminals are recommended; however, care must be exercised to assure the correct speaker phasing. The red binding posts are the signal outputs from each channel, and the black binding posts are chassis ground. The red binding post should be connected to the positive inputs of the associated loudspeakers. For bridge mode operation, only the red binding posts are used, and the associated loudspeaker load is connected between the two red binding posts. The red binding post associated with channel A should be considered the positive output for the system and thus should be connected to the positive input of the associated loudspeaker system.

Regardless of what connections are used, the minimum parallel speaker load should always be limited to 2 ohms per channel or 4 ohms bridge mode for any application. Operation at loads of 4 ohms per channel or 8 ohms bridge mode is more desirable for sustained operation applications due to the fact that the amplifier will run much cooler at this loading. Operation above 4 ohms per channel and even open circuit conditions can always be considered safe; however, sustained operation at loads below 2 ohms could result in temporary amplifier shut down due to the thermal limits fault circuitry.

5-way

binding post speaker outputs for

114”

phone plugs, or banana plugs or stripped wires for use in the binding post terminals. For sustained high power

THE Pl OUTPUT MODULE REAR VIEW

(16)

This diagram shows the wiring for the PI MODULE.

Note that the module itself is

upside down. This is the desired position when connecting this and any other module. Once the correct connections to the

i/4”

spades are made, then

the module itself can be rotated upward and inserted

into the rear panel of the

CS8OOS,

screws replaced.

A WARNING...Never

operate the CS 800s with either the output or input modules removed. Operating in this manor will allow the air flow from the fans to escape from these openings instead of flowing through the power amp and power supply components, and thereby not provide adequate cooling for these components.

and the panel

re-

c w ci N N E L

FOS NEI~

c: w cl II t4 E

P 0 s

t.4 E G

~._._.._..._. _.____

_._...

Following are several other module rear views of a different module and the various wiring schemes. The diagram above and the

ones following are provided so that these modules can be correctly wired. Always double check the wiring. A miswired module can cause severe audio problems, and in the worse case, can cause loudspeaker degradation and failure. In all cases, the color-coded wires are indicated. The double red and yellow wires are the power amp outputs and are not interchangeable. The black wires are the power amp ground connections and are interchangeable.

.THE Sl

Another output module available for this amplifier

is called the Sl MODULE. This module offers dual patching capability to wire these connectors to meet the particular application or loudspeaker needs. The

with the connections labeled

ways. The

OUTPUT MODULE (17)

SPEAKONa

Quick Connectors and a unique

SPEAKON

is a four-wire connector

connector is

lt,

1 -,

2t,

and 2 -. Depending upon the loudspeaker needs, these connections can be used in various

receivino

wide acceptance earticularlv in

Europe.

THE Sl OUTPUT MODULE REAR VIEW

LOW CURRENT STEREO MODE (18) (Option

This Sl module is shipped wired as follows: lt as the channel signal output and 1 as the channel chassis ground. This is really the defacto standard for most low-to-medium power loudspeaker systems. This wiring allows one enclosure to be connected to channel A, and one enclosure to be connected to channel B. The 2 t and 2 - connections are simply not used in this application! In this case the 2 t and the 2 - spades are used to “store” the jumper

cables for later usage.

THE Sl OUTPUT MODULE REAR,VIEW HIGH CURRENT STEREO MODE (19) (Option 2)

Many larger loudspeaker systems use the full capability of the connector by paralleling 1 t and

2t,

and paralleling 1 and 2 -. This wiring improves the current handling capability of the system and reduces losses. Most “subs” with

SPEAKONs

this way. This module can be easily re-wired to this

configuration using the supplied jumpers on the rear of the module. Normally four jumpers are plugged in a connect configuration for “storing”. In this case, one jumper is connected between 1 t and 2t and another jumper is connected between 1 - and 2 - for each channel. This is a total of four jumpers. The diagram (19) shows the wiring of the jumpers.

SPEAKON

are wired

no-

THE Sl OUTPUT MODULE REAR VIEW - BRIDGE MODE (20) (Option 3)

This module can be re-wired to allow the example, two 8 ohm enclosures to be connected in parallel to the CS 800s in bridge mode. In this case the wiring is as both connectors wired to channel A signal output; 1 - on both connectors wired to channel B signal output; 2t and 2 - on both

SPEAKONs

to be the bridge outputs with both in parallel. This arrangement would allow for

follows:lt

connectors not used; channel A and B chassis ground wires are not uses (plugged into isolated floating terminals)! This wiring

requires one jumper per channel for a total of two; the other two are stored! Again, a wiring diagram is included and check it carefully before you proceed!

THE Sl OUTPUT

MODULE REAR VIEW BI-AMP MODE (21)

(Option 4)

The final wiring arrangement is really a natural progression of the

SPEAKON

it’s four wire connections.

Bi-amping

preferred configuration for

most sound reinforcement systems. It will be discussed later in this

manual. The

pins used in the typical

amped

enclosure are: 1 t =

1 - = LOW-; 2t = to a CS 800s via the two supplied from a suitable crossover, and in this case the configuration is channel A is the “lows” and channel B is the “highs”. For this one, the wiring is: 1 t on both connectors wired to channel A signal output; 1 - on both connectors wired to channel A chassis ground wire; 2t on both connectors wired to channel B signal output; 2 - on both connectors wired to channel B chassis ground wire. This configuration also requires two jumpers per channel for a total of four. Again, check the wiring of the module carefully!

capability with

is really the

SPEAKON

loudspeaker

HI+;

bi-

LOW+;

2 - = HI-. With the above wiring arrangement, two

SPEAKON

connectors. First, the CS 800s must be configured for bi-amp mode with each channel signal

bi-amped,

wired loudspeaker enclosures can be connected

INSTALLATION AND CONNECTION

The Peavey CS 800s commercial series power amplifier is designed for durability in commercial installations and the quality of performance required in studio and home applications. The unit is a standard rack-mount configuration, 3 two variable speed internal fans. All the input and output connections are on the back panel. The front panel contains LED indicators for power & DDT activation,

INDUSTRIAL AND COMMERCIAL INSTALLATIONS

For commercial and other such installations where sustained high powered operation is required, the CS 800s should be mounted in a standard EIA 19” rack. It is not necessary to leave rack space between each amplifier in the stack, since the fan pulls air in from the rear and exhausts the hot air out the front. An adequate source of cool air must be provided for the amplifier when rack-mounted. The internal fans must have a source of air that is not preheated by other equipment. If cool, the amplifier will start up in low-speed fan operation, and will normally stay at low-speed operation unless sustained high power operating levels occur. As the amplifier heat sinks heat up the automatic thermal sensing circuitry will increase the fan speed. Depending upon signal conditions and amp loading,

the fan speed may increase to a maximum value, or it may decrease to a minimum value. This situation is quite normal.

Inadequate cooling due to preheated air, a reduction of air flow caused by blockage of the amplifiers overloading the amp may cause the amplifiers thermal sensing system to temporary shut down that particular channel. This will be indicated by the channel power LED on the front panel ceasing to illuminate. Depending upon available cooling air, operation will be restored to that channel relatively quickly, and the power LED will then be illuminated. Corrective action should be taken to determine

the cause of the thermal shutdown. If the amplifier is not severely overloaded or shorted, and air flow is normal in and out of the unit, steps should be taken to provide a cooler environment for all the amplifiers. As a general rule, the cooler electronic equipment is operated, the longer its useful service life.

STUDIO AND HOME INSTALLATION:

In most low-to medium-power applications, the CS 800s can be mounted in any configuration. It is desirable that, if at all possible, the unit be located at the top of an equipment stack. This will prevent possible overheating of any sensitive equipment by the hot air rising

from the power amplifier. As a general rule, most home and studio requirements will never cause maximum high speed fan operation.

If it does however, this may indicate that you have not taken the necessary steps to provide adequate cooling. Remember, closed up in a cabinet, the CS 800s will have severe cooling problems, even at low power levels. Again, inadvertent short circuit or sustained

overloaded usage could also cause temporary thermal shutdown. Most home wiring and electrical circuits are only 15 amps. Two

800s amplifiers could cause a power panel 15 amp circuit breaker to trip if a severe overload occurs.

detented/calibrated

sensitivity controls, and a mains power switch.

l/2”

high and is cooled by

inlet/outlet

ports, or severly

BRIDGE MODE:

The bridge mode on stereo amplifiers is often misunderstood as to the actual operation and usage. In basic terms, when a

two-

channel amplifier is operated in bridge mode, it is converted into a single channel unit with a power rating equal to the sum of both channel’s power ratings, at a load rating of twice that of the single channel rating. In this case the CS 800s is rated at 600 W RMS

per channel into 2 ohms. The bridge mode ratings are 1,200 W RMS into 4 Ohms (minimum load). The bridge mode operation is accomplished by placing the mode switch into the bridge position, connecting the load between the red binding posts of each channel, and then using channel A as the input channel. All channel B input functions are defeated.

Another application for bridge mode operation is to drive sound distribution systems in very large public address applications. In this

mode, the

CS@ 800X

power amplifier can actually drive 70-volt systems directly without using expensive matching transformers. The

real advantage of such an approach is primarily cost. 70-volt distribution systems are very common in domestic applications where large numbers of relatively small loudspeakers are used for background music and paging. Such systems require the use of 70-volt transformers at each loudspeaker. Another common use for the bridge mode is in subwoofer applications where very high output power levels are required to reproduce extreme low frequencies. Such enclosures usually contain two or four loudspeakers to handle the high power levels involved. For bridge mode usage, the enclosure impedance must be 4 or 8 ohms; never below 4 ohms! Also make sure the enclosure can handle 1,200 watts reliably.

DDT’”

Peavey’s patented

DDT’”

compression system enables the sound man to maximize the performance of the amplifier/speaker combination by preventing the power amp from running out of headroom (clipping). This compression system is activated by a unique circuit that senses signal conditions that might overload the amplifier and reduce the amplifier’s gain when clipping is imminent. The threshold of compression is clipping itself and no specific threshold control is used. This technique effectively utilizes every precious watt available for the power amplifier to reproduce the signal while at the same time minimizes clipping and distortion, and thus significantly reduces the potential of loudspeaker degradation and damage. The DDT system is automatic, hands-off approach to the problem of power amplifier clipping.

Since the CS 800s power amplifier uses a circuit breaker for over-current protection, the DDT compression system plays even a more important roll in the continuous performance by preventing each channel from clipping and overloading. Continuous operation at clipping can cause the circuit breaker to trip, but with the DDT activated this problem is minimized. For this reason you should always

have the DDT compression system enabled.

CS” 800s

OUTPUT POWER: (Typical value, 120 V AC, 60 Hz)

Stereo mode, both channels driven

2 ohms, 1 4 ohms, 1 8 ohms, 1

Bridge mode, mono

4 ohms, 1 8 ohms, 1

RATED OUTPUT POWER: (120

Stereo mode, both channels driven

4 ohms, 10 Hz to 20 8 ohms, 10 Hz to 20

POWER BANDWIDTH:

Stereo mode, both channels driven

rated power, 4 ohms,

TOTAL HARMONIC DISTORTION:

Stereo mode, both channels driven

10 Hz to 20

HUM 81 NOISE:

Stereo mode, both channels driven

Below rated output power, 4 ohms, Greater than 100 (30 kHz BW, unweighted)

DAMPING FACTOR:

Stereo mode, both channels driven

4 ohms, 4

ohms,

INPUT SENSITIVITY & IMPEDANCE:

Input attenuator set @ FCW

rated output power, 4 ohms, 1.4 V RMS

CHANNEL VOLTAGE GAIN:

Input attenuator set @ FCW

Stereo mode, 4 ohms, 1 Bridge mode, 8 ohms, 1

SPECIFICATIONS

kHz,

1% THD, 600 W RMS per than

kHz,

1% THD, 420 W RMS per than

kHz,

1% THD, 260 W RMS per than

kHz,

1% THD, 1,200 WRMS

kHz,

1% THD, 840 WRMS

kHz,

0.03% THD, 400 W RMS per than

kHz,

0.02% THD, 240 W RMS per than

~0.1%

THD - 10 Hz to 50

kHz,

4 ohm rated output, Less than 0.03%

Greater Greater

than 1,000 than 400

kHz,

dB dB

100 Hz, 10

kHz,

V AC, 60 Hz)

(+3 dBV) -

kHz

20k ohms unbalanced

FREQUENCY RESPONSE:

Stereo mode, both channels driven

to,

-1

dB,

1 W RMS, 4 ohms, 3 Hz to 60

to,

-0.1 dB @ rated output, 4 ohms, 20 Hz to 20

SLEW RATE:

Stereo mode, each channel - Greater than 40 Bridge mode, mono, Greater than 80

SQUARE WAVE RESPONSE:

Stereo mode, 4 ohms, 80 V P-P output

100 Hz waveform tilt, Less than 5 volts 10 KHz waveform rise-time, Less than 2 US (0% over-shoot)

PHASE DISTORTION:

Stereo mode, 4 ohms @ rated power

20 Hz leading waveform - Less than 6 degrees 20 KHz lagging waveform - Less than 15 degrees

POWER CONSUMPTION:

Stereo mode, both channels driven

rated output power, 4 ohms, 10 A Q 120 V AC

COOLING SYSTEM:

Dual continuously variable speed DC fans

DDT

COMPRESSION SYSTEM -Automatic, switchable with LED indicator

DIMENSIONS &WEIGHT:

Height 3.50” (8.9 cm)

Width 19” (48.3 cm)

Depth 17” (43.2 cm)

Weight 23 Ibs

Specifications

(10.5

kg)

sueect

to change without notice.

kHz

V/US

+ 19 hidden pages