Peavey XR 400B User Manual

GENERAL DESCRIPTION
The new XR 40CB represents our latest effort to combine professional features previously found only in separate mixer/equalizer/power
amp components into a single compact and rugged package. Thedesign of the XR-400B utilizes the latest advances in semiconductor
techno ogy and the overall circuitry has boon designed and optimized by use o' the latest computer-aided design techniques. This unit's
improved specifications have been made possible by a thorough and complete design effort resulting in all new circuitry from the input
jack through to the speaker output
The XR-400B features four independent input channols and includes a separate pre-monitor send, active shelving type high and low
equalization, and a post-effects send on each channel. Master level controls are provided for the main, monitor, and reverb return. A full
five-band graphic equalizer has been built into the system and utilizes the most contemporary active filter circuitry available. Additional
flexibility is provided by the XR-400B’s patch panel, enabling this versatile unit to be used in conjunction with an extremely wide range of
auxiliary equipment.
The 100 watt power amplifier of the XR-400B utilizes four high-voltage, high-speed Tt>-3 power devices Doited to a massive heatsink.
The internal power supply consists of a very large power (mains) transformer featuring a grain-oriented silicon steei core and a high
degree of magnetic shielding to minimize extraneous hum fields. Silicon rectifiers connected in a full wave bridge feed power to large
electrolytic filter banks and provide considerably more music powor than tho 100 watt RMS power rating would indicate.
Overall, the XR-400B brings professional performance together in an extremely versatile and compact portable package, offering
features and specifications formerly available only with separate components.
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FRONT PANEL
INPUT JACKS (A) and (B)
The new XR-400B is equipped with dual channel input connectors. The balanced low impedance input (A) is intended for use with low
impedance microphones and accepts the professional XLR standard-type connectors. The high impeCance input IB) is equipped with
standard phone jack connectors as per professional practice. Note: It is not possible to use both low and hign impedance Inputs on any
single channel simultaneously.
CHANNEL CONTROLS
Each of the XR-400B’s four independent channels contain five controls: Gain, Monitor. Effects and High and Low Equalization
CHANNEL GAIN CONTROL (C)
The channel gain control varies the gain 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 noise operation This control is used to set the level of the
respective channels to acnieve the main mix.
CHANNEL MONITOR CONTROL (D)
The channel monitor cont'ol is a totally independent level adjustment used for deriving the proper monitor mix. It is important thal the
user be aware that this channel monitor send is totally independent from all oilier channel controls and feeds directly into the monitor bus
whose output is determined by the master monitor control (I).

Peavey XR 400B Specifications

General

Brand	Peavey
Model	XR 400B
Category	Amplifier
Language	English