Mode Switch - Peavey 80304543 Operating Manual

especially into a 2 ohm load, will cause the breaker to trip. If this occurs, simply reset the breaker and correct the cause of the over-
load. When tripped, the button on the breaker will be outward nearly 1/2" and can be reset by pushing inward. A normal 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 serv-
ice center for repair.
IEC MAINS POWER CONNECTOR (7)
The CS ® 500A is fitted with a universal IEC connector. Into this connector one should always insert a heavy-duty #16 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 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. If, however, their use is
necessary, always use a three-wire type with at least a #16 AWG wire size. The use of lighter wire will severely limit the power capa-
bility of this amplifier. Always use a qualified electrician to install any necessary electrical equipment. To minimize 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

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
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 mini-
mize outside interference!
The Female 1/4" Phone Jack Input (12) in the center of the "combo" connectors is also connected to a unique "quasi-balanced" input
circuitry. 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 short 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) that 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 polari-
ty 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," 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.
Each channel also has a Female Phone Jack (14) labeled "thru". This jack offers very flexible patching capability. When the XLR
input connectors (11) are used, 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
® new "combo" connector
™ compressor.
14 11 12 13 11 12 14
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