Peavey XR-600B Operating Manual

XR-600B
OPERATING GUIDE
WARNING:
TO PREVENT ELECTRICAL SHOCK OR FIRE
HAZARD. DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
FEATURES:
6 balanced low impedance and 6 unbalanced high impedance inputs; channel "pre" monitor sends; 9-band graphic EQ; 300 watts RMS
effects loops.
GENERAL DESCRIPTION
The new XR'"-600B represents our latest effort to combine protessional features previously found only in separate
mixer/equalizer/power amp components into a single compact and rugged package. The redesign of the XR-600B utilizes the latest
advances in semiconductor technology and the overall circuitry has been designed and optimized by use of the latest computer-aided
design techniques. This unit's improved specifications have seen made possible oy athorouah and completedesign effort resulting in all
new circuitry from the input jack through to the speaker output.
The XR-600B features six independent input channels and includes high impedance and oalanced low impedance inputs a separate
pre" monitor send, active shelving type high and low equal ization, and a "post" effects send on each channel. Master level controls are
provided for the main, monitor and effects mixes. A full nine-band graphic equalizer has been built into the system and utilizes the most
contemporary active filter circuitry available. Additional flexibility is provided by the patch panel, enabling this versatile unit to be used in
conjunction with an extremely wide range of auxiliary equipment, the new XR-600B also features the unique ability to blend reverb return
signals into tho monitor mix.
The newly re-engineered 300 wait RMS (2 ohms) power amplifier features our exclusive DDT*" ("Distortion Detection Technique")
compression circuitry that electronically senses the onset of clipping and automatically activates the compression circuit to minimize
distortion in the power amp. The use of this DDT compression circuit effectively increases the apparent headroom available, thus utilizing
every precious watt of power available. This compression feature allows the XR-600B to quite effectively compete with systems having
considerably more RMS power.
The power amp of the XR-600B utilizes eight high-voltage, high-speed TO-3 power devices
boltGd
to a massive heatsink. The internal
power supply consists of a very large power (mains) transformer featuring a grain oriented silicon steel core and a high degree of
magnetic shielding to minimize extraneous hum fields. Silicon rectifiers connected n a full wave bridge teed power to large electrolytic
filter banks and provide considerably more music power than the 300 watts power rating would indicate.
Overall, the XR-600B brings protessional performance together in a singleextremely versatile and compact package, offering features
and specifications formerly available only with separate components.
FRONT PANEL
INPUT JACKS (A) AND (B)
The new XR-600B is equipped with dual channel input connectors. The balanced low impedance input (A) is intended for use with ow
impedance microphones and accepts the professional XLR standard type connectors. The high impedance input (B) is equipped with
standard phone jack connectors as per professional practice. NOTE It is impossible to use both low and high impedance inputson any
single channel simultaneously.
CHANNEL CONTROLS
Each of the XR-600B's six independent channels contain five controls: Level. Monitor, Effects and High and Low Equalization.
CHANNEL LEVEL CONTROL (C)
This control varies the level of the input preamplifier. This input preamp is designed around a variable negative feedback approach and
provides optimum dynamic range as well as extremely low noiseoperation. T his control is used to set thelevel of the respective channels
to achieve the main mix.