Peavey ICS 4200 - Manual (Page 11)

11
B Brriid dg ge ed d M Mo od de e
A pair of amplifiers may be bridged together to make a single output with a power rating equal to the
sum of both channel power ratings at twice the load rating of a single channel. In other words‚
bridging two amplifiers rated for 200 Watts into 4 Ohms will produce 400 Watts into 8 Ohms. In
Bridged Mode‚ the channels operate at opposite polarity from each other so that one channel pushes
and the other pulls equally. This mode sends the input signal to one channel and the same signal
with its polarity reversed to the other channel in the pair (A/B or C/D). For example‚ connect the input
signal to Channel A input connector. Then‚ connect a jumper wire from the p
po ossiittiivve e ((+ +)) terminal of the
Channel A input connector to the n ne eg ga attiivve e ((--)) terminal of the Channel B input connector. Likewise‚
connect a jumper wire from the n ne eg ga attiivve e ((--)) terminal of the Channel A input connector to the
p po ossiittiivve e ((+ +)) terminal of the Channel B input connector. (See below.) B Bo otth h channel level controls (in
this example‚ A & B) MUST be used to control the signal level and b bo otth h MUST be set at the same
position. The input level controls are detented to match these settings precisely.
N No otte e:: D Du ue e tto o tth he e u un niiq qu ue e iin np pu utt tto op po ollo og gy y‚‚ tth he e m mo od du ulle e p po orrttss C CA AN N N NO OT T b be e sse ett u up p tto o
d drriiv ve e tth he e a am mp plliiffiie err iin n B Brriid dg ge ed d M Mo od de e..
The loudspeaker load is connected only to the designated positive (+) output terminals of the bridged
channels. NEVER ground either side of the loudspeaker load cable when the amplifier is in Bridged
Mode as both sides are “hot.” If an output patch panel is used‚ all connections must be isolated from
each other and from the panel. In the Low Z output mode‚ the minimum nominal load impedance in
Bridged Mode is 8 Ohms; this is equivalent to driving both bridged channels at 4 Ohms. In the 70 V
output mode‚ the bridged output is 140 V and the minimum load impedance in Bridged Mode is 50
Ohms. Driving loads of lesser impedance may activate the protective muting system. See OUTPUT
MODES below.
N No otte e:: R Re eg ga arrd dlle essss o off o op pe erra attiin ng g m mo od de ess‚‚ N NE EV VE ER R cco on nn ne ecctt tth he e a am mp plliiffiie err o ou uttp pu uttss tto og ge etth he err..
C Ca au uttiio on n:: O Ou uttp pu utt v vo olltta ag ge ess g grre ea atte err tth ha an n 112 20 0 V V R RM MS S a arre e a av va aiilla ab blle e b be ettw we ee en n tth he e b brriid dg ge ed d
tte errm miin na allss.. C CL LA AS SS S 3 3 w wiirriin ng g m mu usstt b be e u usse ed d iin n a acccco orrd da an ncce e w wiitth h n na attiio on na all a an nd d llo occa all cco od de ess
tto o cco on nn ne ecctt tth he e llo ou ud dssp pe ea ak ke err ssy ysstte em m..
W Wa arrn niin ng g:: T Th he e llo ou ud dssp pe ea ak ke err o ou uttp pu utt cco on nn ne eccttiio on nss o off tth hiiss a am mp plliiffiie err a arre e h ha azza arrd do ou uss w wh he en n lliiv ve e
a an nd d p prre esse en ntt a a ssh ho occk k h ha azza arrd d w wh he en n tth he ey y a arre e e en ne errg giizze ed d.. T Ta ak ke e tth he e ffo ollllo ow wiin ng g p prre ecca au uttiio on nss::
1. Do not touch any bare wires that are connected to the loudspeaker output connectors.
2. Use insulated loudspeaker cables and touch-proof connectors on the loudspeakers.
3. Do not attempt to make connections to the output connectors or the loudspeaker
connectors when the amplifier is turned on.
4. Double-check all connections and make sure there are no exposed wires or connectors
before turning the amplifier on.
5. Make sure there are no frayed-cables or wires and that all connections are tight and secure
every time before turning the amplifier on.
6. External wiring connected to these terminals requires installation by a trained person or
the use of ready-made leads or cords.