BSS Audio MSR-602/604II Owner's Manual - Manual (Page 7)

5
MSR-604 II Microphone Signal Splitter
flexibility of gain and level control, internal bus routing, signal meter-
ing and a headphone monitoring facility.
The MSR-604 II is a four channel, four way signal splitting package
and the MSR-602 II is the system power supply capable of supplying
power for 20 channels, that is, 5 separate MSR-604 II units.
The MSR-604 II has four channels, each of which may be isolated and
used totally independently from the next or, by internal re-configuration,
be interconnected to form distribution amplifier sections with a single
input driving up to 64 outputs.
The low noise floor requirement necessitates a remote power supply
system, the MSR-602 II, which provides the required DC voltages.
A MIC/LINE switch introduces a 20dB input pad, which in combination
with the 5 step GAIN switch allows any input signal below + 33dBu to
be perfectly matched to the MSR-604 II’s dynamic range. The setting up
process is further assisted by the provision of a momentary LISTEN
switch which routes the signal to a calibrated HEADROOM meter and a
headphone monitor amplifier built into the MSR-602 II power supply
unit. Each channel also has a CLIP LED to give constant warning against
signal overdrive. As a further refinement a separate 10dB input pad may
be activated from the front of house mixing console by switching the
desks phantom supply. This remote attenuator allows the engineer to
preserve the channel headroom directly from the consolein the event
that an input is overdriven.
Each channel also provides a separate phantom powering selector switch
providing an independent 48V across the ‘mic input’ connector.
Each channel has two low impedance electronically balanced outputs
on the rear panel to feed the MAIN (Front of House) and the MONITOR
mixing consoles. These outputs may be independently configured by
internal header blocks to drive at mic (+3dBu clip) or at line (+23dBu
clip) levels. A third setting allows these outputs to be driven at +13dBu
clip which gives a gain/headroom structure compatible with earlier
versions of the MSR-604. The two FEED XLR connectors on the front
panel offer microphone level transformer isolated and balanced
outputs.
1.1 MSR-604
Mic/Line Signal
Splitter