Peavey 800S User Manual
CS 800S
Operating Guide
®
Intended to alert the user to the presence of uninsulated Òdangerous voltageÓ within the productÕs
enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
Intended to alert the user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the product.
CAUTION: Risk of electrical shock Ñ DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer
servicing to qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before
using this appliance, read the operating guide for further warnings.
Este s’mbolo tiene el prop—sito, de alertar al usuario de la presencia de Ò(voltaje) peligrosoÓ que no tiene
aislamiento dentro de la caja del producto que puede tener una magnitud suficiente como para constituir
riesgo de corrientazo.
Este s’mbolo tiene el prop—sito de alertar al usario de la presencia de instruccones importantes sobre la
operaci—n y mantenimiento en la literatura que viene con el producto.
PRECAUCION: Riesgo de corrientazo Ñ ÁNo abra!
PRECAUCION: Para disminu’r el riesgo de corrientazo, no abra la cubierta. No hay piezas adentro que el usario
pueda reparar. Deje todo mantenimiento a los tŽcnicos calificados.
ADVERTENCIA: Para evitar corrientazos o peligro de incendio, no deje expuesto a la lluvia o humedad este
aparato Antes de usar este aparato, Iea m‡s advertencias en la gu’a de operaci—n.
Ce symbole est utilisŽ pur indiquer ˆ lÕutilisateur la prŽsence ˆ lÕintŽrieur de ce produit de tension nonisolŽe dangereuse pouvant •tre dÕintensitŽ suffisante pour constituer un risque de choc Žlectrique.
Ce symbole est utilisŽ pour indiquer ˆ lÕutilisateur quÕil ou quÕelle trouvera dÕimportantes instructions sur
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aucune pi•ce pouvant •tre reparŽe par lÕutilisateur. Confier IÕentretien ˆ un personnel qualifiŽ.
AVERTISSEMENT: Afin de prŽvenir les risques de dŽcharge Žlectrique ou de feu, nÕexposez pas cet appareil ˆ la
pluie ou ˆ lÕhumiditŽ. Avant dÕutiliser cet appareil, lisez les avertissements supplŽmentaires situŽs dans le guide.
Dieses Symbol soll den Anwender vor unisolierten gefŠhrlichen Spannungen innerhalb des GehŠuses
warnen, die von Ausreichender StŠrke sind, um einen elektrischen Schlag verursachen zu kšnnen.
Dieses Symbol soll den Benutzer auf wichtige Instruktionen in der Bedienungsanleitung aufmerksam
machen, die Handhabung und Wartung des Produkts betreffen.
VORSICHT: Risiko Ñ Elektrischer Schlag! Nicht šffnen!
VORSICHT: Um das Risiko eines elektrischen Schlages zu vermeiden, nicht die Abdeckung enfernen. Es befinden
sich keine Teile darin, die vom Anwender repariert werden kšnnten. Reparaturen nur von qualifiziertem
Fachpersonal durchfŸhren lassen.
ACHTUNG: Um einen elektrischen Schlag oder Feuergefahr zu vermeiden, sollte dieses GerŠt nicht dem Regen
oder Feuchtigkeit ausgesetzt werden. Vor Inbetriebnahme unbedingt die Bedienungsanleitung lesen.
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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 tworack-space unit that weighs just under 23 pounds.This new design retains the extended performance capability of the old
CS® 800X, providing impressive two ohm output power capability, and maintaining the old 4 and 8 ohms ratings with
awesome industry standards for power bandwidth, slew rate and distortion specifications. The new “S” design also reflects
a significant improvement in damping factor specifications. Following are the new CS 800S specs:
• 420 W RMS into 4 ohms...600 W RMS into 2 ohms (per channel)
• 840 W RMS into 8 ohms...1200 W RMS into 4 ohms (bridged)
• DDT
™
compression with LED indicators and defeat switch
• Slew Rate: 40 V/microsecond, stereo mode, each channel
• Power Bandwidth: 10 Hz to 50 KHz @ 4 ohms, @ rated power
• Total Harmonic Distor tion: Less than 0.03%, @ rated power
• Hum and Noise: 100 dB below rated power,unweighted
• Damping Factor: Greater than 1000 @ 4 ohms, 100 Hz each channel
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 IGBT design.The supply has a thermal monitor system with
proportional fold-back which prevents a total shutdown at extreme operating temperatures. The new CS 800S retains the
Peavey patented DDT™compression system which virtually eliminates any possibility of clipping. The new back panel
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
• Two rack space height...less than 17" depth
• Under 23 lbs...switching power supply
• Plug-in modular inputs
• Dual XLR (bal)/phone jack (unbal) with“thru”output per channel
• Universal three-way crossover module
• Plug-in modular outputs
• Dual phone jack and 5-way binding post per channel
• Dual Speakon
®
Quick Connect with patchable selection of pin-outs
• Modular construction
• Replaceable channel and power supply modules
• Significantly reduced mains turn-on surge
• Two variable speed DC fans...lower noise levels
• Calibrated/detented input attenuator control each channel
• DDT-activation LED and power LED each channel
• Recessed rear panel DDT and bridge switch
• IEC mains connector
THE DIGITAL POWER SUPPLY
• Ultra reliable - Robust
• Uses proven Half-Bridge topology...fewer parts
• 1,700 W peak power...25% over-design
• IGBT design...high efficiency
• Light weight...cost effective
• Massive aluminum heat sink...greater thermal stability
• Thermal monitor system with fold-back feature...no shutdown except fault
• Effective, low-cost filter design...low conducted EMI
• Fully operational down to 85 V AC mains (domestic)...170 V AC mains (expor t)
We hope you will find your new CS 800S not to be just another power amplifier, but the most exciting power amplifier you
have ever purchased. Please read over this owner’s manual carefully. It will help you to use this exciting product most
effectively.
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FRONT PANEL
DDT
™
ACTIVE LED (1)
Illuminates when DDT™Compression is taking place.With the ENABLE/DEFEAT switch in the DEFEAT position, the LED indicates
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 dBV necessary to attain the full output power rating.
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!
REAR PANEL
CIRCUIT BREAKER (6)
The CS®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 destr uction due to fault conditions in the amplifier.The trip current value has
been carefully chosen to allow continuous power output perfor mance 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 shor t 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 1/2", and can be reset by pushing inward. A nor mal reset button length is about 1/4".
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.
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IEC MAINS POWER CONNECTOR (7)
The CS®800S is fitted with a universal IEC connector. Into this connector one should always insert a heavy duty #14 AWG 3
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 particular ly 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 #14 AWG wire size.The use of lighter wire will severely limit the power
capability of this amplifier.Always use a qualified electrician to install any necessary electr ical 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 DDT™compressor.
MODE SWITCH (9)
This switch is used to select either STEREO or
BRIDGE mode of operation.
THE B1 INPUT MODULE (10)
The standard input module shipped with each amplifier
is called the B1 MODULE. It offers both XLR electronic
balanced and phone jack quasi-balanced inputs for
each channel using Neutrik's new “combo” connector
to save panel space.
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!
The female 1/4" phone jack input (12)
in the center of the “combo” connectors are also connected to a unique “quasibalanced” input circuitr y.When used, these 1/4" jacks are not “chassis grounded” but connected to ground through a relatively low
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 shor t 1/4" cable patches are made to this input from various outputs on this amp and other equipment
that share the same rack with this amp.This “quasi-balanced” circuit is “automatic”, and is virtually invisible in normal usage. It cannot
be defeated.
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 #1 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 “in” position of switch (13) should be selected yielding pin #2 positive, pin #3 negative, and pin #1
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 polar ity of the loudspeaker connections at the output.
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 1/4"
phone jack input (12) is used as the input, 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.
Additional input modules are available from your author ized Peavey Dealer. Details of these modules and the installation instructions
can be secured from this source.
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THE P1 OUTPUT MODULE (15)
The standard output module shipped with each
amplifier is called the P1 MODULE. It offers both dual
1/4" jacks and 5-way binding post speaker outputs for
each channel. For each channel, the outputs are in
parallel, hence the speaker connection cables can be
terminated with 1/4" phone plugs, or banana plugs or
stripped wires for use in the binding post terminals.
For sustained high power 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.
THE P1 OUTPUT MODULE REAR VIEW (16)
This diagram shows the wiring for the P1 MODULE.Note that the module itself is upside down.This is the desired position when
re-connecting this and any other module. Once the correct connections to the 1/4" spades are made, then the module itself can be
rotated upward and inserted into the rear panel of the CS-800S, and the panel screws replaced.
WARNING: Never operate the CS
®
800S with either the output or input modules removed.Operating in this manner 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.
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 worst 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.
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THE S2 OUTPUT MODULE
The S2 output module offers dual Speakon®Quick
Connectors and a unique patching capability to
wire these connectors to meet the particular application.The Speakon
®
is a four-wire connector with
the connections labeled as 1+, 1-, 2+ and 2-.
Depending upon the loudspeaker needs, these
connections can be used in various ways.
NOTE:
Consult your loudspeaker specifications to determine the wiring configuration
(mode) that will best suit your system.
THE S2 OUTPUT MODULE REAR VIEW — STANDARD STEREO MODE (17)
This Speakon®wiring arrangement shown below is
as follows: 1+ as the channel signal output and 1- as
the channel chassis ground.This is the de facto
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+ and 2- connections
are not used in this application. Please notice that
the binding posts on the S2 module also use the
1+ and 1- wiring arrangement.The channel A red
and black binding posts are always connected to the
channel A Speakon 1+ and 1- respectively. Similar ly,
the channel B red and black binding posts are
always connected to the channel B Speakon 1+
and 1- respectively.
WARNING:The S2 module is shipped with four jumpers plugged in a “storage” configuration across the nor mally unused 2+ and 2-
Speakon pins.These jumpers are used in other modes of operation following.This “storage” configuration could cause a
shorting problem if a par ticular loudspeaker system’s Speakon connectors are wired in the high current configuration outlined next (1+ and 2+ are connected and 1- and 2- are connected). In this case, we recommend that you remove the
jumpers.
THE S2 OUTPUT MODULE REAR VIEW - HIGH CURRENT STEREO MODE (18)
Many high power loudspeaker systems use the full capability
of the Speakon connector by paralleling 1+ and 2+, and
paralleling 1- and 2-.This wir ing improves the current
handling capability of the system and reduces losses. Many
subs with Speakons are wired this way.The S2 module can
be rewired to this configuration using the supplied jumpers
on the rear of the module. Normally, four jumpers are
plugged into a “storage” configuration to prevent losing
them. In this case, one jumper is connected between 1+
and 2+ and another jumper is connected between 1- and
2- for each channel.This is a total of four jumpers.The
following diagram shows the new wiring of the jumpers.
Notice for this mode, the binding post can still be used as
normal outputs for both channels.
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THE S2 OUTPUT MODULE REAR VIEW - BRIDGE MODE (19)
The following wiring allows the Speakons to be the
bridge outputs with both in parallel. Such an arrangement permits two 8 ohm enclosures to be connected
in parallel to the CS-S amp in Bridge Mode. In this
case, the wiring is as follows: 1+ on both connectors
wired to Channel A signal output; 1- on both connectors wired to Channel B signal output; 2+ and 2- on
both connectors not used.The Channel A and B
chassis ground wires are not used (and are plugged
into isolated floating terminals.) This wiring requires
one jumper per channel for a total of two; the other
two are “stored.” Please note for this wiring, both red
binding posts are now connected to the channel A
output, and both black binding posts are now
connected to channel B output. Consequently, to connect additional speakers in bridge mode one must use a red and black binding
post pair rather than connecting across both red binding posts as in the default arrangement.
THE S2 OUTPUT MODULE REAR VIEW - BIAMP MODE (20)
The final wiring arrangement is a natural progression
of the Speakon®capability with its four wire connections. Biamping is often the preferred configuration for
many sound reinforcement systems.The Speakon
pins used in the typical biamped speaker enclosure
are: 1+ = LOW+; 1- = LOW-; 2+ = HI+; 2- = HI-. This
is also a “standard.” In this case, two biamped wired
loudspeaker enclosures can be connected to a CS-S
amp via the two Speakon connectors.First, the CS-S
amp must be configured for biamp with each channel
signal supplied from a suitable crossover, and most
importantly, the configuration is: Channel A as the
“lows” and Channel B as the “highs.” For this mode
then, the wiring is: 1+ on both connectors wired to
Channel A signal output; 1- on both connectors wired
to Channel A chassis ground wire; 2+ on both connectors wired to Channel B signal output; 2- on both connectors wired to Channel B
chassis ground wire.This arrangement again requires two jumpers per channel for a total of four. Always check the diagram and wire
the module with care. For this wiring, both red binding posts are now connected to the channel A output, and both black binding posts
are now connected to chassis ground.Thus, both binding post red/black pairs are the biamped low output, and can be used to drive
additional sub enclosures, if desired.
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 1/2" high and is cooled by
two variable-speed internal fans.All the input and output connections are on the back panel. The front panel contains LED indicators
for power and DDT activation, detented/calibrated sensitivity controls, and a mains power switch.
INDUSTRIAL AND COMMERCIAL INSTALLATIONS
For commercial and other 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 star t 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.
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Inadequate cooling due to preheated air, a reduction of air flow caused by blockage of the amplifier's inlet/outlet ports, or severely
overloading the amp may cause the amplifier's thermal sensing system to temporarily 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, electronic equipment in a cooler
environment will have a longer and more 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 shor t circuit or
sustained overloaded usage could also cause temporary thermal shutdown. Most home wir ing and electrical circuits are only 15
amps.Two CS 800S amplifiers could cause a power panel 15 amp circuit breaker to trip if a severe overload occurs.
BRIDGE MODE
The bridge mode on stereo amplifiers is often misunderstood as to its actual operation and usage. In basic terms, when a twochannel amplifier is operated in bridge mode, it is converted into a single channel unit with a power rating equal to the sum of both
channels
’
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 br idge 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 extremely 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 an 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 role in the continuous performance by preventing each channel from clipping and over loading. 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.
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