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Model 172 PBM
IMPORTANT NOTE - Only if you are NOT using the complete System 170: If you are using a
surround receiver/processor that includes its own filtered subwoofer output and ultra-compact satellites, we
strongly recommend that you connect the 172 PBM to your system using the high level (speaker) inputs. This
is because most receiver/processor internal crossovers are 12dB per octave, which isn’t steep enough for use
with the higher crossover levels required for ultra-compact satellites. In such a case, only use the low level RCA
inputs when the processor outputs unfiltered signals. Should your processor include a 120Hz crossover, and a
slope of 18dB or higher, you may connect it to the low level inputs on the 172 PBM.
● Two line inputs, two line thruputs
The thruputs allow daisy chaining of multiple subwoofers, or can act as a return path back to the
processor.
● Two high level inputs, two high level thruputs
These let you connect the subwoofer to your amplifier using the amplifier’s speaker outputs.
Once again, you can daisy chain to another subwoofer using the unmodified signal that comes
out of the thruput connectors.
● A Phase Invert toggle switch (Normal/Invert)
This switch allows precise acoustic matching with speaker systems whose output may be phase
reversed. This switch also allows you to compensate for unusual room acoustics that occur when
a woofer is physically separated from the midrange/high frequency units. Be sure to try the Phase
switch in both positions when you set up the 172 PBM. Even if you just change the built-in
crossover settings it’s a good idea to try the Phase switch in both positions, since the crossover
control and the Phase switch acoustically interact with each other.
● A front panel mounted level control
● Automatic standby operation
Automatic standby features automatic signal sensing turn on and a 7-10 minute turn-off delay.
There’s a front panel multi-color LED status indicator.
● An AC cord power input socket
Your subwoofer comes supplied with a heavy-duty detachable power cord.
● Designed and built to meet all UL/CSA and European safety requirements
Connecting Your Subwoofer
The Atlantic Technology System 172 PBM Powered Subwoofer is simple to hook up, offering several
connection methods for maximum flexibility. Study the system diagrams starting on page 5. Once you
have found the example which most closely matches your system, hook up your subwoofer(s) as
shown in that diagram.
Low-Level Connection
If you have purchased the entire System 170, we suggest using the low-level (RCA jack) subwoofer line
out or preamp output if your receiver/processor has one. Simply connect your subwoofer with high
quality shielded cables as shown in the diagrams. Use the diagram that best suits your connection
requirements.