Peavey XR-600B Operating Manual

XR-600B
OPERATING GUIDE
WARNING:
TO PREVENT ELECTRICAL SHOCK OH FIRE
HAZARD^ DO NOT EXPOSE THIS APPLIANCE
TO RAIN OR MOISTURE.
FEATURES;
6 Balanced low iiTipedance and 6 unbalanced high impedance inputs: channel "pre * monitor sends, 9-band graphic £Q; 300 watts RMS;
effects loops.
GENERAL DESCRIPTION
The new XR"'-6D0B represents our latest effon to combine professional features previously fourrcl only in separate
mjxer/epualizer'power amp components into a single compact and rugged package, The redesign ottneXR*600B utilizes the latest
advances In serniconductortecnnoiogyandlhe overall circuitry has been designed and optimized by use of the latest computer-aided
design techniques. This unit's improved specifications have been made possible oy athorough and completedesign effort resulting in all
new circuitry from the input jack through to the speaker output.
The XR-$005 features aixindependent inputchannefs and mcludes high impedance and balanced low impedance inputs, a separate
'•pre''monitor send, active shelving type high and loweQualization, and a'post" effects send on each channel. Master level cantrolsare
provided for the main, moniiorand effects mixes. A full nine-band graphic equalizer rras been built i Dtp the system and utilizes the moat
contemp o ra ry acti v e f il le r circ u itry ava i I a ble. A dd it! o n a I f lex i Bi I iiy i s p rovid ed by th e patch pane I, enabf i n g Ih is versatile u rrit to be used i n
conjunction with an extremely wide ran geofauxillary equipment, the new XR-600B also features (he unique ability to blend reverb return
signals into the monitor mix.
The newly re-engmeered 300 wait RMS (2 ohms) power amolitier features our exclusive DOT"^ ("Distortion Detection Technique '}
compression circuitry that etectromcaHy senses the onset of clipping and automaticatl/ activates the compression circuit to minimize
distortion In the power amp.The uaoof Ihie DDTcornpression circuiteffectively increased the apparent headroom available, thus utilizing
every precious watt of power available. This compression feature allows the XR-600Bla quite effectively compete with systems having
considerably more RMS power.
The power amp ottheXR*600B utilizes eight hrgh-vpliage, high-speed TO-3 power devices Bolted 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 m a full wave bridge teed power to large electrolytic
filter banks and provide considerably more music power than the 3D0 watts power rating would indicate.
Ove ral I, {he X R -600 B b ri n gs protes s ional p e ri orm a n c e toget h e r in a si ngle ext re me I y versat i fe a nd co mpact pack age. offerin g feature s
and specifications formerly available only with separate components.
FRONT PANEL
INPUT MCKS (A) AND {B)
The new XR-600B is equipped with dual channel input connectors The balanced low Impedance input (A) is ir^ended lor use with low
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 i$ impossible to use both low and high impedance inputs on 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 arourKl a variable negative feedback approach and
provides optimum fly namic range as well as extremely low noise operation. This control is usefl to seithelevelofthe respective channels
to achieve the main mU.