PSB SubSeries: The PSB SubSeries 300 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 (from NAD): The PSB SubSeries 300 powered subwoofer
employs a custom-designed Class D discrete MOSFET amplifier from NAD. The integrated digital
amplifier from NAD 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.
12" Woofer: To compliment the powerful Class D amplifier, the
SubSeries 300 uses a 12" polypropylene cone woofer with rubber surround, 1.5"
voice coil, and 35oz magnet. The PSB woofer is designed to reduce mechanical
noise and prevent harsh sounds at extreme excursion.
Bass-Reflex Cabinet: The PSB SubSeries 300 powered subwoofer features
a bass-reflex cabinet with a down-firing port for greater efficiency and bass
response. The down-firing port has a large radius end that flare to reduce noise
from air turbulence.
Front-Mounted Controls: Two rotary control knobs (volume/crossover)
and phase switch are provided on the front of the subwoofer for added
convenience. The front-mounted controls are hidden behind detachable grille.
Volume Control: The rotary volume knob controls the output level of
the powered subwoofer, relative to the volume of the other speakers in the
Low-Pass 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 stereo speakers.
Phase Switch: The phase switch allows for the
adjustment of the phase of the subwoofer in relation to the speakers used in the
system; either 0 or 180 degrees.
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. A green LED, located on the front panel between the
control knobs, will glow when the subwoofer is active (it will glow red when
LFE Input/Output: A single gold-plated RCA jack (LFE) is provided for
connecting the powered subwoofer to your AV receiver's LFE output. Since the
subwoofer/LFE outputs are 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 adding additional subwoofers.
Stereo RCA Input/Output: Two gold-plated RCA jacks are provided for
connecting your receiver via the low-level input. 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 a stereo RCA
cable plugged into both left and right inputs. If the preamp outputs are
unfiltered, the subwoofer's internal crossover should be used. The powered sub
also has stereo preamp outputs; useful if your amp has pre-out/main-in jacks.
Speaker-Level Input: Two pairs of 5-way binding post terminals (for
left and right channel) are provided for connecting the powered sub with speaker
wire. The terminals will accept bare wire, spade lugs, pin connectors, and
single or dual banana plugs.
Power Cord: The subwoofer has a removable 8' power cord with
an IEC 2-pronged connector. This allows you to use a third-party IEC-type power
cord, if desired.