Atlantic Technology 272 PBM THX - Manual (Page 3)

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Model 272 PBM THX
Atlantic Technology
®
● A linear power high current Class A/B amplifier conservatively rated at 225 watts RMS
This advanced amplifier is a fully discrete design utilizing audiophile grade component parts
including a custom-wound, low-hum Torroidal transformer. The output stage is capable of very
high current delivery for exceptional driver control. As a custom designed amplifier it has been
precision matched and equalized to the 12" driver. Together they deliver powerful, controlled
bass with great articulation and authority.
● A useful in room working frequency range of 20Hz to 180Hz
Many subwoofers offer specifications that look great on paper, but in real world use deliver less
than promised. Atlantic Technology subwoofers are over-designed to ensure that they will deliver
their rated performance in your room, when properly placed and adjusted.
● An adjustable (55Hz to 140Hz) @ 18dB per octave low-pass crossover
The steep upper end roll-off slope of 18dB per octave allows for much better bass integration
with the satellite speakers while making the woofer less localizable.
Note: If you are using a surround Processor/Receiver that includes its own filtered subwoofer output (or a
THX Certified Processor/Receiver), we strongly recommend that you set the 272 PBM THX crossover control to
the THX/Bypass position.
● Two low level inputs, two low level thruputs
The thruputs allow daisy chaining of multiple subwoofers, or 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 switch (Normal/Invert)
This switch allows precise acoustic matching with satellite speaker systems whose output may be
phase reversed. This switch also allows you to compensate for unusual room acoustics that occur
when the 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 272 PBM THX. Even if you’ve simply
changed 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. Pay
particular attention to the transition of bass from the woofer to the satellites, listening for
smooth and well defined bass throughout the range.
● A convenient front panel mounted Level Control
● Automatic standby operation, LED indicator
Automatic standby features signal sensing turn-on with 7-10 minute turn-off delay. There’s a
front panel multi-color LED status indicator that lets you know when the unit is on or in
standby. Automatic Standby can be defeated by placing the rear mounted switch in the Bypass
position. If you find the front mounted LED distracting simply remove the grille from the
enclosure, turn it over 180 degrees, and re-install it on the cabinet. The lower section of the grille
frame has been designed to block the LED from view when you do this.
● An AC cord power input socket.
Your subwoofer comes supplied with a heavy-duty detachable power cord.
● Designed and built to meet all current UL/CSA and European safety requirements