10" Woofer + Dual 8" Passive Radiators: The Boston Acoustics MSub
powered subwoofer contains a front-firing 10"woofer and two side-firing 8" passive radiators to deliver
rich bass with very little distortion. With the MSubwoofer, you can enjoy rich
bass while listening to music, watching movies or TV shows, or playing games
through your home theater system.
500-Watt Amplifier w/ Torroidal Transformer: The built-in 500-watt
power amplifier can provide up to 1,000 watts of peak output when needed. The
speaker's internal power supply features a large torroidal transformer to keep
plenty of power on reserve to handle demanding music or film soundtracks with
BassTrac Circuitry: The subwoofer's amplifier features BassTrac
circuitry, a proprietary Boston Acoustics-designed technology, which tracks the
subwoofer's input signal and prevents the amplifier from being driven into
audible distortion. Unlike conventional designs, BassTrac does not merely remove
the signal peaks that cause distortion; instead it preserves the waveform's
shape so the fidelity of the signal is maintained. Even the heaviest bass
passages in movies or audio tracks will sound solid, rich, and full, without
Controls: The Boston Acoustics MSub provides two rear-panel controls
to fine tune the powered sub to your home theater system.
- Volume Level: The rotary volume control adjusts the volume of the
powered subwoofer relative to the other speakers in your home theater
- Low Pass Crossover: The MSubwoofer features an adjustable low
pass filter (40-180Hz) that allows you to tune the subwoofer's output to
match the bass extension of the main speakers for optimal balance. For
instance, if your speakers have excellent bass extension, you can set the
subwoofer to produce only the lowest tones.
- Polarity Switch: The subwoofer's polarity switch allows
you to select 0° or 180°. If the bass sounds weak, muddy, or unclear,
toggling the polarity control may strengthen the bass attack.
- Auto-On: The Auto-On Circuit automatically turns the
amplifier on when an audio signal is detected. It will automatically turn
off after several minutes with no signal. The LED indicator on the back of
the sub glows green when the unit is on and red when the unit is in standby.
Connections: To connect seamlessly with your home theater system, the
MSubwoofer is equipped with three types of inputs.
- LFE Input: The LFE input (low-frequency effects) input is
designed to be used with electronics such as preamplifiers, audio/video
receivers, and other devices with an LFE output and built-in crossover
controls (the sub's built-in crossover will not be used).
- Stereo RCA Inputs: The left and right Stereo RCA inputs allow you
to connect the powered sub to a home receiver's subwoofer preamp output (not
LFE). You can use the sub's built-in low pass filter to optimize the
crossover point between the subwoofer and your main speakers.
- Speaker-Level Inputs: Use the sub's speaker-level inputs
(binding posts) when
your receiver does not contain an LFE or stereo RCA output. These speaker
inputs accept both left and right channel speaker signal from your receiver
(make sure your front speakers are set to Large). The binding post
speaker terminals will accept bare wire (up to 10AWG), banana plugs
(single/dual), spade-connectors, or pin-connectors.
Placement: For optimal results, place the powered subwoofer on the
same wall (or in a corner) as your front speakers. In principal, the lower the
crossover point, the greater the distance the powered sub can be from your front
speakers. However, the sound is typically best when the sub is within 12' of the
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