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Front Panel
1
5
20
23
16
26
THERMAL
PROTECT
6
29
PWR
SIG
DDT
TM
DDT
32
4
3
INPUT GAIN (dB)
1
These controls are used to adjust the input gain of each channel. They determine how "loud" each channel of the power amplifier
will sound for a given input signal level. Maximum input gain is achieved at the fully clockwise setting (+32 dB, 40 X), and this
setting yields maximum mixer/system headroom. A setting of less than fully clockwise will yield lower system noise at the
expense of mixer/system headroom. Turning the control fully counterclockwise is the "off" setting (-∞). It is always a good idea to
power up any new installation at this setting to protect the system loudspeakers.
POWER LEDS (PWR)
2
These indicators illuminate when the AC mains power is being supplied to the amp and both channels are operational. If either
channel experiences fault conditions, exceeds safe operating temperature limits, or if the mains circuit breaker trips; both channel
power LEDs will be dark, indicating "shutdown". If the BRIDGE mode is selected, the PWR indicator on channel B will remain
dark as a positive indication of this mode selection.
SIGNAL ACTIVITY LEDS (SIG)
3
These indicators illuminate when the associated channel output signal level exceeds 1 V RMS.
DDT™ ACTIVE LEDS
4
These indicators illuminate when DDT compression is taking place in the associated channel. If the rear panel DDT switch is
depressed, then DDT is defeated and these LEDs indicate clipping is occurring in the corresponding channel. The Peavey DDT
compression system will be covered in greater detail later in this manual.
Thermal Protect LED
5
This indicator illuminates when the thermal sensor on either heatsink reaches approximately 90 degrees C, at which point, the
amplifiers are muted while the fan remains on high speed. If this happens repeatedly, either reduce the load on the amplifier
(detach one of the speakers), or supply additional cooling to the amplifier, such as a fan. When rack mounting, it is helpful to
leave 1 RU open above and below the amplifier to prevent heat buildup from adjacent units.
POWER SWITCH
6
This heavy-duty, rocker-type switch turns on the mains power to the amplifier. When the mains power is applied, there is a delay
in activation of the unit. This reduces/eliminates the turn-on transients associated with the system equipment connected to the
amplifier and protects loudspeakers.
DUAL PRIMARY FUSE
7
In order to accommodate line voltage switching, the power transformer is designed with two primaries that can be placed in
series or parallel by means of the line voltage selector switch. Each primary is individually fused, so there is no need to change
fuse values when a different line voltage is selected. It is important to use the fuse values specified on the rear panel. The fuses
are provided to limit current to the associated transformer primary winding, and protect it from overheating and possible
destruction due to fault conditions in the unit. The trip current values have been carefully chosen to allow reasonable continuous
power output performance, while still protecting the power transformer. These fuses should not open unless there is a fault in the
amplifier circuitry that causes excessive mains current draw. However, abnormal conditions such as a short circuit on either or
both channels, or continuous operation at overload or clipping (especially into 2-ohm loads per channel or 4-ohm bridge load)
can cause the fuses to open. If this occurs, UNPLUG from the AC POWER source before replacing the fuses, after waiting a brief
period of time to allow the unit to cool down. Efforts should be made to correct the cause of the overload, first by disconnecting
one output at a time, and then one speaker at a time until the bad cable or damaged speaker is isolated. If the fuses open
instantly each time you attempt to turn the unit on, it should be taken to a qualified Peavey Service Center for repair.
20
23
16
26
6
29
TM
SIG
PWR
32
2
8
6
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