Atlantic Technology CTS 2 PBM - Manual (Page 2)

CotHpaci V^eaiaf
By Allantic Technology
System Two PBM
High Performance Powered Subwoofer
Congratulations on your purchase of an Atlantic Technology
Compact Theater Two PBM powered subwoofer. With proper
care, your new subwoofer will provide many years of trouble-free
performance.
The System Two PBM is capable of delivering very high output
levels and a wide dynamic range with smooth in-room response
down to approximately 20 Hz, with a peak SPL of lOSdB.
The built-in proprietary high-current Class G amplifier is conser­
vatively rated at 150 watts RMS. This amplifier, coupled with the
massive 12" long-throw woofer in a sealed enclosure, generates
musically accurate deep bass with a minimum of distortion.
Your Atlantic Technology powered subwoofer will smoothly
integrate with virtually all other brands of loudspeakers on the
market. All its internal electronics have been designed to maintain
optimum signal integrity. From the premium quality gold plated
connectors to the clearly marked controls, this is one of the most
versatile high performance subwoofers you can buy. An added
benefit is its relatively compact size and straight forward design.
Features
Your Atlantic Technology powered subwoofer has been
engineered using the latest technology and finest components
available. It features:
Long-throw 12" driver with a vented motor
structure and 2" high temperature, 4 layer voice coil.
This powerful driver has a very stiff cone that acts as an almost
perfect piston throughout its operating range. Its massive
magnetic motor assembly and high temperature component
parts deliver high performance and exceptional reliability.
Sealed enclosure for low distortion and deep bass
output.
Sealed enclosure designs are inherently low in distortion and
naturally deliver deep, smooth bass response with a gradual
and predictable roll-off below resonance. As with all Atiantic
Technology subwoofers, we have paid inordinate attention
to giving you accurate musical bass reproduction along with
terrific special effects.
A linear power high current Class G amplifier
conservatively rated at 150 watts RMS.
Atlantic’s advanced Class G amplifiers utilize dual low
voltage/high voltage power supplies for exceptional power
delivery from a compact, efficient package. One power
supply operates during all “normal” demand periods. But
when a high demand peak signal appears at the subwoofer
input, the second, high voltage supply immediately switches
in to dramatically boost the amplifier’s low distortion output
capability. The amplifier delivers very high power levels yet it
consumes less steady-state power and produces much less
heat than standard comparable amplifier designs. The
System Two PBM’s custom designed amplifier has been
precision matched and equalized to its 12” driver. It exerts
accurate and powerflil control over the driver for the best
performance possible.
Useful working frequency range from 20 Hz to 150Hz.
A unique Dual Diversity Crossover''^ (DDC) system
with an adjustable (50 Hz to 150 Hz) 12 dB per
octave low-pass crossover, and a fixed 24 dB per
octave “voice filter” at 180 Hz.
This sophisticated crossover’s upper end roll-off slope is an
extremely steep 12 dB -t 24 dB per octave, totaling 36 dB
per octave above 180 Hz. It allows for exceptional
integration with most any brand or type of speaker on the
market. We have developed this unusual design to eliminate
any possibility of out-of-band information being audible
from the subwoofer and thereby maldng it localizable.
The DDC filter is incorporated to allow this subwoofer to
match well with compact home theater speaker systems. If
you are using a subwoofer with extremely small satellites
which have limited mid-bass output you have to cross over
the subwoofer at a fairly high frequency. Since very compact
Left / Right / Center speakers typically aren’t capable of
delivering significant output below 100 to 125 Hz, their
mating subwoofer must reproduce these sounds. However,
it’s critically important that all sounds above this frequency
be eliminated from the subwoofer, in order to make for
correct system integration. This is because higher
frequencies are your ears’ clues to where sound comes from.
The innovative DDC 36dB crossover in the System Two
PBM ensures precise and seamless system integration with
compact satellite speakers. A subsonic filter is also
incorporated to filter out inaudible ultra-low frequencies
that can rob amplifier power.
Important Note—If you are NOT using the
complete Compact Theater System Two:
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 System Two PBM to your system using the
speaker or high level inputs. This is because most
receiver/processor internal crossovers are only 12dB per
octave, which is not steep enough for use with the
higher crossover levels required for ultra-compact
satellites. 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 System Two PBM {see Example 1).
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.