Peavey IRM 8150 User Manual

IRM 8150

Powered Mixer

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Intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure
that may be of sufficient magnitude to constitute a risk of electric shock to persons.

Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the
literature accompanying the product.

CAUTION: Risk of electrical shock – DO NOT OPEN!
CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside. Refer servicing to

qualified service personnel.
WARNING: To prevent electrical shock or fire hazard, do not expose this appliance to rain or moisture. Before using this

appliance, read the operating guide for further warnings.

Thank you for purchasing the Peavey IRM™ 8150 mixer amplifier. This is an eight-channel,
easy-to-use, powered mixer.

Your IRM™ 8150 features a rugged, heavy-gauge, cold-rolled steel and aluminum chassis,
finished in oven-cured epoxy for toughness and screen-printed utilizing the latest photo­graphic film and U.V.-cured ink technology for razor-sharp, hard-wearing control I.D. and
calibration graphics.

Every on-board component has been carefully chosen to deliver the highest possible perfor­mance. Precision, professional reliability and absolute minimal operating noise characteris­tics are among the initial criteria used during the process of selecting the components that
ensure that your IRM™ 8150 becomes an indispensable addition to your performance equip­ment.

All printed circuit boards are constructed from rugged, U.S. military-spec material, using the
latest automated assembly technology, wave solder, and computer-controlled "all-faults­analyzed-and-corrected" Q.A. procedures.

Each channel features front panel main and monitor level controls, as well as high, mid, low
equalization and AUX send controls. Every input channel has a studio-quality low imped­ance (XLR-type input) microphone input as well as a 1/4" line input. Switchable
+48 V phantom power is provided.

The unit features a 150 watt power amplifier.

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CHANNEL SECTION:

LEVEL (1)

Controls the channel output level. This signal is routed via the main bus to the main level control. The channel
level also affects the signal to the AUX send control.

MONITOR (MON.) (2)

Controls the channel monitor mix level. This is independent of all other channel controls. Controls the amount of
signal from a particular channel in the monitor mix. This signal is routed to the Mon. control in the master
section.

LOW EQ (3)

Controls the channel low EQ level. An active tone control (shelving type, ±12 dB) that varies the low frequency
range.

MID EQ (4)

Controls the channel mid EQ level. An active tone control (peak/notch, ±12 dB) that adjusts the mid frequency
range.

HIGH EQ (5)

Controls the channel high EQ level. An active tone control (shelving type, ±12 dB) that varies the high frequency
range.

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AUX SEND (6)

Controls the channel AUX drive level. This signal is routed to the AUX master control, where AUX send signals
from all channels are summed together. Controls amount of send from a particular channel to AUX output. The
channel level control also affects the signal from the AUX send.

MASTER SECTION:

POWER INDICATOR:
PILOT LIGHT LED (7)

Illuminates when AC power is being supplied to the amp.

9-BAND GRAPHIC EQ (8)

Provides +6 dB, -12 dB equalization at each center frequency. EQ boost is obtained by moving a particular EQ
band's slide control above the center line. EQ cut is obtained by moving a particular EQ band's slide control
below the center line.

OPERATION NOTE: This equalizer is designed to provide room equalization, feedback control and system
tone control. No amount of equalization will correct the response curve of a poor loudspeaker. Always begin
with all sliders in the "0" position and avoid excessively cutting large segments of the audio passband, which
would limit the system's dynamic range. Also, avoid boosting sliders excessively. This limits the headroom of
the amplifier and can cause clipping if excessive channel EQ boost is used simultaneously.

MAIN (9)

Controls the overall volume level of the main system. The signal from this control is available at the main output
(20). Under normal conditions this signal is also internally patched through the graphic EQ and power amplifier
so that this control sets the volume of the speakers connected to the output barrier strip (30). Maximum master
signal level is obtained by rotating this control fully clockwise. Minimum master signal level cut is obtained by
rotating this control fully counterclockwise.

MONITOR (10)

Controls the overall monitor mix level. Maximum monitor signal level is obtained by rotating this control fully
clockwise. Minimum monitor signal level is obtained by rotating this control fully counterclockwise. The moni­tor signal is supplied to the monitor output jack (21).

AUX (11)

Controls the signal level supplied to the AUX output jack (22). Maximum AUX signal level is obtained by
rotating this control fully clockwise. Minimum effects signal level is obtained by rotating this control fully
counterclockwise.

TAPE SECTION:

TAPE OUT LEVEL (12)

Controls the signal level at the tape out jacks (16). Signal is derived from the main output, but operation is
independent of the main master level control (9) and the graphic equalizer (8).

TAPE/AUX IN LEVEL (13)

When external signals are patched into the tape in jacks (15) or the auxiliary input (25), TAPE/AUX IN LEVEL
(13) provides control over the level of signals sent from these inputs to the main mix.

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TAPE/AUX TO MON (14)

Controls the level of tape or AUX IN signal to be sent to the mon. bus. This signal will be mixed with channel
monitor signals.

TAPE OUT/TAPE IN: CAUTION

Before placing connected tape decks in the "record" mode, set the TAPE/AUX IN level control to "0" or off.
Most tape decks feed the input signal directly to the output when in record mode. This creates a "closed loop"
condition from the tape out to tape in jack which can affect the operational level or sonic quality of the system
and cause feedback.

TAPE IN (RCA TYPE) JACKS (15)

These two jacks provide a paralleled input for proper mono mixing of stereo tape deck outputs. For monaural
tape sources, use either jack.

TAPE OUT (RCA TYPE) JACKS (16)

These two jacks provide the same monaural signal to be supplied to the left and right inputs of a stereo tape deck.
Output level is determined by the TAPE OUT (12) level control.

REAR PANEL INPUT/OUTPUT SECTION:

BALANCED LOW IMPEDANCE INPUT (17)

For use with low impedance microphones or low-level sources equipped with an XLR connector.

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