The AR-133 is a single channel DI box
with high input impedance, ΒΌ" jack input
and parallel link outputs to feed backline
amps, input attenuation of 0dB, 20dB or
40dB, powered by console phantom power
or internal 9V battery (with fail-safe
switchover), output ground lift switch,
output XLR connector, rugged aluminium
case and protective side bumpers.
A parallel input XLR connector allows
the AR-133 to be also used as a line
balancer for interfacing with other types of
equipment.