ATI PB2X8 User Manual

Audio Technologies Inc.  856-719-9900  [e-mail]  www.

audio.com

© Copyright 2008, Audio Technologies Inc.

PB2X8

DISTRIBUTION AMPLIFIER

OPERATING AND MAINTENANCE MANUAL

DESCRIPTION

The PB2X8 is an analog audio distribution amplifier with special features making
it ideal for a Press Distribution system. It provides two high quality XLR inputs
that can be individually switched or mixed into any of eight isolated line level
outputs. Each input may be individually switched for microphone or line level
operation with phantom power and low cut filters available for the microphone
inputs.

A calibrated test tone oscillator can be switched in place of either input for
system test and level checks.

A bargraph LED display meters either input, or any of the eight outputs. The
meter may be switched for OVU indication at nominal XLR line outputs of +4, +8
or +18dBm with the top position an effective headroom indicator. A headphone
output follows the meter selection for audible monitoring.

Each of the eight XLR outputs is a separate, independent and isolated amplifier
channel which may be switched to the A input, the B input or to the A+B sum to
mix both inputs. Each output channel has its own level control and a transformer
isolated XLR output, which will drive balanced or unbalanced 600 ohm and
higher loads at full line level. In addition, alternate output positions provide either
a 1/4-inch or a 3.5mm TRS jack with an attenuated output at -10dBu IHF level.
Internal jumper plugs can convert any of the –10 outputs to a nominal
microphone level at –50dBu. Either balanced TRS (Tip/Ring/Sleeve) plugs or
unbalanced TS (Tip/Sleeve) plugs may be interchangeably plugged into the
PB2X8.

A pair of 1/4-inch TRS jacks parallels the main XLR inputs to allow convenient
loop-thru connection into another PB2X8 for further system expansion. A ground
lift switch isolates the shields of the loop-thru TRS jacks to prevent ground loop
induced hum.

PURPOSE

Use your PB2X8 to clear out the usual forest of podium microphones by
distributing just an unobtrusive single or back-up pair of microphones.

Safely Isolate and distribute audio to all types of professional, semi-professional
and consumer grade recorders with no interaction or hum loops.

Easily match multiple level requirements and connector types.

Cleanly mix or switch both inputs into any or all eight outputs.