Parasound
®
ZoneMaster
™
250 Owner’s Manual
Page 10
Bridged Output and Mode Switch
Bridged Output Switch
The Bridged Output switch engages an 80
Hz low pass filter (crossover)
when the amp is used in Bridged Mode. This allows a passive in-wall
sub to be powered by the Model 250 without the need for an additional
external crossover. This switch does nothing if the Mode switch is set
to Stereo on Mono.
Full Range:
The Bridged output will be full range without any
filter. Select this if you are using the amp in Bridged Mode and you
will be powering a full range speaker.
80
Hz Low Pass:
This setting will apply an 80
Hz low pass filter (18
dB/oct.)
to the Bridged speaker output. Select this option if you are using the amp in
Bridged Mode and you will be powering a passive subwoofer.
Mode Switch
The Mode switch determines how the amplifier is utilized. There are three options:
Stereo:
The Stereo setting routes the Left channel input to the Left channel speaker outputs and the
Right channel input to the Right channel speaker outputs.
Mono:
The Mono setting combines the Left and Right channel inputs into a summed L + R mono signal
and routes it to both the Left and Right channel speaker outputs. In the Mono mode you can connect two
mono speakers to the A output (one speaker connects to the L+ and L- and the other speaker connects to
the R+ and R- terminals). An additional two mono speakers can be connected to the B output terminals.
All speakers will play the same Mono signal.
The Mono Mode is particularly useful for applications such as bathrooms and hallways where mono
speakers and a single speaker wire are more practical than separate L and R wires and a single one-
point stereo speaker.
Bridged:
The Bridged Mode setting internally reconfigures the left and right amplifier channels into a
single channel amplifier with more than the twice as much power to drive a single speaker. The
ZoneMaster Model 250 has an onboard low pass filter making it perfect for driving a passive in-wall
subwoofer.
