7
AACC PPoowweerr SSwwiittcchh//CCiirrccuuiitt BBrreeaakkeerr ((11))
The CS 1200H amplifier has a combination AC switch/circuit breaker on the front panel. If the switch
shuts off during normal use, push it back to the ON position once. If it will not stay on, the amplifier
needs servicing.
IInnppuutt AAtttteennuuaattoorrss ((22))
Whenever possible, set the attenuators fully clockwise to maintain optimum system headroom. The
input attenuator controls (one for channel A, one for channel B) located at the front panel adjust gain
for their respective amplifier channels in all modes. See the specifications at the end of this manual
for standard voltage gain and input sensitivity information.
When operating in the bridged mode, the channel A attenuator controls the signal. See the section on
BBrriiddggeedd MMoonnoo
Operation for more information and precautions.
FFrroonntt PPaanneell IInnddiiccaattoorrss
The CS 1200H features four front panel discrete LED indicators per channel:
AACCTTIIVVEE
,
DDDDTT
,
TTEEMMPP
and
DDCC
. These LED indicators inform the user of each channel’s operating status and warn of
possible abnormal conditions. This amplifier also features two 10-segment bar graph indicators
per channel:
SSIIGGNNAALL
.
SSiiggnnaall LLEEDD ((33))
This LED is at the bottom of the bar graph display and lights when its channel produces an output
signal of greater than 2 Volts RMS or 50 mV input with a 0 dB attenuation of the front panel knobs. It
is useful in determining whether a signal is reaching and being amplified by the amplifier. The 10-
segment graphs indicate the level of signal present.
DDCC LLEEDD ((44))
The DC LED lights to indicate that the channel’s output relay is open, disconnecting the speaker(s)
when the amplifier senses a DC voltage or subsonic high level signal at its output.
TTeemmpp LLEEDD ((55))
The Temp LED lights to indicate that the channel’s output relay is open, disconnecting the speaker(s)
due to an overheating condition. Once the channel temperature has returned to safe operating
conditions the LED will turn off and the speaker(s) will be reconnected.
DDDDTT AAccttiivvee LLEEDD ((66))
Illuminates when DDT Compression is taking place. With the Enable/Defeat switch in the Defeat
position, the LED indicates when clipping distortion is occuring.
DESIGNED AND MADE IN U.S.A.
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