PSB SubSeries: The PSB SubSeries 250 powered subwoofer is
designed to provide the flattest possible frequency response, full bass
extension, low distortion, and high output. The PSB SubSeries powered subwoofer
is perfect for music and movie soundtracks.
Class D Discrete MOSFET Amp: The PSB SubSeries 250 powered
subwoofer employs a custom-designed Class D discrete MOSFET amplifier rated at
200W RMS/300W Peak. The built-in digital amplifier features an automatic varying
switching frequency that maintains maximum efficiency and low THD under all
conditions. The Class D amplifier also incorporates proprietary limiting
circuitry preventing audible overload while remaining true to the dynamics of
your music or movie sound track. This circuitry combines peak limiting circuits
that hold amplifier signal swing to the point just short of the amplifier's
clipping, with compression circuitry that will reduce the amplifier's gain.
10" Woofer: To compliment the powerful Class D amplifier,
the SubSeries 250 uses a front-firing 10" polypropylene cone woofer with rubber
surround, high-temperature voice coil and vented pole piece. The woofer is
designed to reduce mechanical noise and prevent harsh sounds at extreme
Sealed MDF Cabinet: The PSB SubSeries 250 features an acoustic
suspension (sealed) MDF cabinet that is ultra-rigid and acoustically inert. It
also comes with an acoustically transparent detachable grille. In addition, four
vibration absorbing feet isolate the cabinet from your floor. As a result, the
SubSeries 250 delivers tight, accurate bass that is uncolored without
distortion. The cabinet is finished in a high-gloss black.
Rear-Mounted Controls: Three rotary control knobs
(Bass Level, Crossover, Phase) are provided on the rear-panel of the powered sub for
- Bass Level: The rotary Bass Level knob controls the
output level of the powered subwoofer, relative to the volume of the other
speakers in the system.
- Crossover: The low-pass crossover adjusts the
high-frequency roll-off of signals sent to the subwoofer. The control is
continuously variable from 50 Hz to 150 Hz, and allows you to precisely
match the subwoofer's bass production with your system's main left & right
- Phase: The phase dial allows for the adjustment of
the phase of the subwoofer in relation to the speakers used in the system;
from 0 to 180 degrees.
Low-Level & High-Level Connectivity: The PSB SubSeries 250 powered
subwoofer offers multiple connection options - including LFE, Stereo RCA, and
Speaker-Level inputs and outputs. Gold-plated terminals are used for the powered
sub's inputs and outputs, providing excellent signal transfer.
- LFE Input/Output: An LFE input is provided
for connecting the powered subwoofer to your AV receiver's LFE output. Since
the LFE output is filtered by most receivers/processors, the
subwoofer's variable low-pass filter is not required and is bypassed. The
powered subwoofer also has an LFE output for daisy-chaining additional
- Stereo RCA Input/Output: If your receiver or integrated
amplifier has preamp outputs, or if you are using a preamplifier without a
designated subwoofer/LFE output, the preferred connection is to use the
stereo RCA input of the powered subwoofer. In this setup, the subwoofer's
internal crossover will used. The sub also has as stereo RCA low-level
output, useful if your amp has pre-out/main-in jacks, or when using a
separate preamp and amplifier. The low-level output is internally processed
by the sub's active high-pass crossover at 80Hz.
- Speaker-Level Input/Output: A set of speaker-level
inputs are provided for connecting the powered sub to your receiver's left &
right front speaker outputs, while a set of speaker-level outputs are
provide to connect your front left & right loudspeakers to the powered sub.
These 5-way binding-post terminals will accept bare wire (up to 10AWB),
spade lugs, pin connectors, and banana plugs (single or dual). The powered
subwoofer's low-pass crossover (50-150Hz) will send all low frequencies to
the powered sub, while midrange and high frequencies are sent to your
Optional Wireless Link: Two Bluesound
RT100 wireless adapters (sold separately) can be used to wirelessly transmit
audio from your AV receiver's LFE or subwoofer output to the PSB SubSeries 250's
LFE/RCA input. The SubSeries 250 features a USB port that supplies power to the
RT100. If your AV receiver is not equipped with a rear-panel USB port, you will
also need a USB/AC adapter (sold separately) to power the RT100 at the AV
Auto On/Off: The powered subwoofer features a main power
switch on the back panel. When switched to On, the subwoofer is initially in
stand-by mode, awaiting the presence of an audio signal. When the signal is
received, the subwoofer turns on automatically. When no signal is detected, the
sub's amp will automatically turn off after approximately 15 minutes. In the Off
position, the subwoofer will not power up. You can also setup the powered
subwoofer to manually turn on and off with the main power switch.
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