Oxmoor 4x4 - Manual (Page 3)

Page 1
4x4 INTRODUCTION
• UL and CE listed
• Front panel, screwdriver-adjustable gain trims
• Electronically balanced, XLR-type inputs and outputs
• +24 dBu input signal levels
• +26 dBu output signal levels
• Built-in RF suppression
• Compact, 1U rack space chassis
• Internal jumpers for setting various output configurations
The Model 4x4 is a compact, four-channel audio
buffer/mixer/distribution amplifier. Any of four
inputs can be assigned to any (or all) of the four
outputs. Internal jumpers are used to configure
the unit, thus affording complete flexibility with
security from unauthorized tampering.
The 4x4 is intended for use in mobile or fixed-
installation applications in sound reinforcement,
broadcast or recording, and in other audio sys-
tems requiring high-quality performance, flexible
audio routing and combining, and adjustable
level matching.
While it is an exceptional distribution amplifier,
with four independently adjustable gain stages,
the 4x4 does more than distribute audio. Its mix-
ing capability enables it to combine up to four
inputs to drive a single output. Two independent
mixing buses enable signals to be mixed before
or after the gain stages. The 4x4 can be used as a
zone mixer or a line driver. It is ideal for match-
ing different signal levels to perform such com-
mon conversion tasks as interfacing hi-fi equip-
ment with professional audio systems. The 4x4
can accomplish this while also providing both a
stereo output and a mono sum.
Front panel gain trimmers provide
±
15 dB of gain
adjustment that may be assigned to the inputs or
outputs. RF suppression circuitry safeguards
against radio-frequency interference. Input and
output stages are electronically balanced and fit-
ted with standard 3-pin, XLR-type connectors.
The model 4x4T is supplied with output trans-
formers. For enhanced flexibility, each output
driver can be set for balanced or unbalanced op-
eration using internal jumpers. Output gain is
independently adjustable over a
±
15 dB range,
with a +26 dBu maximum output level into a 600
ohm or higher impedance load, and an overall
frequency response of 20 Hz to 20 kHz , +0, -0.3
dB.
Designed to satisfy exacting professional stan-
dards, the 4x4 offers excellent performance in a
highly dependable package. Its impressive audio
specifications are ideally suited to recording and
broadcast applications; yet its rugged 1U rack-
mount chassis, coupled with exceptional immu-
nity to environmental stress, also makes it an ideal
choice for demanding road work and commer-
cial installations.