Peavey CS 1200 User Manual

daisy-chain the inputs. Each channel would still deliver 600 watts RMS to each enclosure (a total of 1200 watts for both), but now you would
have a redundant system with the advantage of being able to adjust the individual levels if that is a desirable feature. Another frequent
application problem is driving a single 4 ohm enclosure in bridge mode. This is simply an example of not understanding that when bridge
mode is selected, therated load specification is twice that of singlechannel operation. In this case, under continuous full power operation the
amplifier will thermal out.
Although bridge mode operation is very easy to accomplish on the CS-1200, and we have provided an indication means whenever themode
is selected, again, a thorough understanding of the patch panel features will allow further expansion to more complex systems. The following
list should provide more information toward these goals:
1. For proper bridge mode operation, both wires of the output must “float”' above ground. If either wire were to become grounded,
this would present a short circuit to the associated channel of the CS-1200. As an aid in determining the condition of the
distribution system, the DDT activation LED’s on both channels are operational when the bridge mode is selected. Whenever the
CS-1200 reaches full power output, both DDT activation LED’s should flash simultaneously, indicating that DDT compression is
taking place in both channels. This is a normal indication, since in bridge mode with normal loading, both channels should reach
full power simultaneously. If the DDT activation LED on one channel flashes at a much lower signal level than that of the other
channel, this indicates that the bridge loading is not balanced and that one leg may have becomeshorted to ground. In this case,
steps should betaken to locatethe problem and clear it. If both LED’s flash at relatively low output power levels, then this indicates
that the total bridge loading is too low in value or possi bly shorted across itself. Remember, just as in the stereo mode, the power
LED array (Channel A) should reach 100% indication before the DDT system is activated on both channels
2. The jumper plug in the transformer accessory socket (10) of channel A island can be replaced with a PL-2 transformer module.
This will convert the XLR connector on Island A to balanced operation and provide a balanced input for the bridged CS-1200.
3. The jumper plug in the crossover accessory socket (12) of the Channel A island can be replaced with a crossover or other special
purpose plug-in module. As per previous discussion, the associated bridge power amp input jacks (12) are now isolated, and
signals must be patched to this bridge input to complete the circuit. Obviously, in bridge mode the CS-1200 is only a one-channel
amp. Consequently, to biamp, additional power amplifier channels must be available. Again, a word of caution concerning the
power handling capability of the associated loudspeaker components in order. Unless the components are part of an array
connected in some series/parallel arrangement to distribute the power, biamping with the CS-1200 in bridge mode (1200 watts)
should be avoided
4. You should notice from Diagram 4 that crossover island B is completely isolated whenever bridge mode is selected, and it is
normally not used. However, it can be used with additional plug-in modules for expanded and more complicated systems. These
additional patches we will leave to the imagination of the user.
As you can see, the CS-1200 is a very flexible amplifier. We highly recommend that you become Ihoroughly familiar with every aspect of
operation before connecting any speaker system to it. Pay particular attention to the functions of the patch panel and load impedance. We
have included several patch diagrams for information purposes.
Attention Mr. Service Technician: If the time should ever come for you to service a CS-1200 (which we sincerely hope is very infrequently),
the complete disassembly instructions are available from the Peavey National Service Center upon request. By carefully following the printed
instructions you should have no problems gaining access to the heat tube itself and all the associated circuitry. Our Service Department
stands ready to help you if needed with additional instructions on the correct service parts Warning: There are no user serviceable parts or
functions inside the amplifier. Disassembly should only be attempted by a qualified Peavey service technician, and only after the amplifier has
been disconnected from the mains power source.
Warning: Voltage levels inside this amplifier could cause severe bodily harm. Always disconnect unit from mains power source and
discharge major electrolytic capacitors before attempting to service. Additionally, the mains power source is switched by a mains triac which
is controlled by the front panel rocker switch Mains power voltage is always present at this triac even with the switch off
ACCONUING TO,
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EXPOSURE TOEXTREMELV HIGH NOISE LFVEISMAV CAUS* X PERUANENT HEARING LOSS INDIVIDUALS VARYCONSIDERABLY WSUSCERTIBIllTYTONOlSE INDUCED HE ARING LOSS BLTNFAF**
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IHfc U S GOVERNMENT StXXUPAHONAL SAKfctY AND HEALTH ADMINISTRATION lOSMA)HAS SPECIFIED THE FOLLOWING PERMISSIBLE NGtSELtVtL EXPOSURES
DURATION P€RDAY IB HOURS SOUND LFVFl d*A. WOW RF8PONM
( 90
Obey aiicautionsm tne operating instructions ano on tne
hack of me unit
Ali cperating mslruclions should Oe followed
This product should not h*> usod near water, i e a
bathtub sink, swimming pool, wet basement etc
This product shco d be dcated so lhai its position does
net morfore with ile p'oper ventilation li should rot he
placee Uni ogamfi a wall or pieced in a bull m enckwuro
lhat w ll impede ihe llow til tooling an.
This product shoo'd not be placed near a source of neai
tuch at a sto«o. radiator or another boat producing
amplifier
>w*r supply i
power Sup
, theground pin<
information on grounding
booklet ‘Shock Hsucrd and Grounding”
10 Power sjpply co»ds should always be handled caretuiiy
Never walk o- place equipment on oower supply cords
Periodically check cords lor ems or ago* of Stress,
especially at the plug ar>d Iho pomt where the cord exits
Ihe ur«t
r l Tho power suppy cord should be unpegged w*nen me
unit is to be unused lor long periods ot timo
i? If this product is to be mounted in an equipment ract. rear
support should bo pronded
M Care should be leken so that object* do not tall and
liquids are not spilled into the unit through the vontilation
Mbs or any other openings
15 This unit should be chec*ed by a qualified service
lochnician H:
A. The power supply cord c< plug naa Deeo damaged
B. Anything bos fallen or peon spilled mtothounii.
C. The unit does not operate correctly
D The unit has been dropped or iheenclosuredamaoEd
‘6 The user should not looitcmpt luMrvice h acquitment
aii service want should be done by a quamied service
technician

Peavey CS 1200 Specifications

General

Channels	2
Signal to Noise Ratio	> 100 dB
Input Impedance	20k ohms balanced, 10k ohms unbalanced
Weight	35 lbs
Dimensions	3.5" H x 19" W x 15.25" D