Powered Subwoofer
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Specifications
Frequency Response (±3dB)
Subwoofer Amplifier Power
Subwoofer Crossover
45Hz–200Hz
FTC Rated Power: 50 watts @ 50 Hz into 4 ohms at less than 1% THD+N
75Hz–200Hz
24dB/octave low-pass
Crossover Bypass
Bass Unit
Yes
8" (203mm) DCD
down-firing
Enclosure Type
Ported
Dimensions (HxWxD)
(with feet and rear connectors)
13 x 111/4 x 151/2"
(330.5 x 287 x 393mm)
Weight
18 lbs (8.1kg)
Description
Boston’s PV350 subwoofer delivers the dynamic bass foundation that is essential for lifelike reproduction of movie
soundtracks and music in the home. This attractive, powered subwoofer will complement any stereo or home theater
surround sound system with its impressive bass output and compact size.
This subwoofer utilizes our rugged DCD™ (Deep Channel Design) bass unit designed in Boston’s state-of-the-art engi-
neering facility in Peabody, Massachusetts. Every one is tested as it comes off the line to be within ±1dB of the lab refer-
ence unit, an incredibly tight tolerance. The amplifier has a built-in variable crossover that makes it easy to achieve a
seamless blend with the front/main speakers, while a 24dB/octave low-pass filter prevents the subwoofer from being
easily localized by ear, increasing placement flexibility. A crossover bypass function is provided for use with home theater
electronics that perform their own bass management.
Because of its strong amplifier and computer-optimized tuning, the PV350 is capable of impressive deep bass and high
output from a remarkably compact enclosure. In addition, it features BassTrac®, a proprietary Boston-designed circuit
that tracks the input signal to the subwoofer and prevents its amplifier from being driven into audible distortion. The
benefit: The bass stays clean and strong at almost any listening level.
Connections
Line level: Use the jack labeled “line level in” with most systems. These inputs accept the line level signal from your
receiver’s subwoofer output. The subwoofer’s circuitry filters out the high frequencies and sends the remaining low fre-
quencies to the subwoofer power amplifier.
Speaker level: Use these high-level terminals with receivers that do not have a subwoofer output. The speaker inputs
accept both left and right channel speaker signals from your receiver.
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How to Connect Using the Speaker Terminals
We recommend 18-gauge wire or thicker for runs up to 15 feet (4.5m), and 16-gauge wire or thicker for longer runs.
Separate the first few inches of the wire conductors. Strip off 1⁄2-inch (12mm) of insulation from the ends of each speaker
wire to expose the two conductors and tightly twist the wire strands.
WARNING: To prevent electrical shock hazard, always switch off the amplifier or receiver when making connections to
the speaker.
When making all connections, be sure to connect the + (red) on the speaker to the + (red) on the amplifier, and the –
(black) on the speaker to the – (black) on the amplifier.
Using the five-way binding posts: The binding
posts permit easy connection to banana plugs,
spade lugs, and bare wire. Insert the wire in the
hole and tighten.
IMPORTANT: Typically, one side of the wire is
smooth. Connect this side to the – (black) connection.
The other side has a rib or stripe. Connect this to the
+ (red) connection.
Connecting the Subwoofer to Digital Home Theater Systems
Digital 5.1, 6.1 and 7.1 home theater electronics dedicate one channel (the “.1”) to reproduce the special low-fre-
quency information (such as explosions and thunder) contained in digitally-encoded soundtracks.
Select ”subwoofer-yes“ from your receiver’s set-up menu. Hooked up this way, the receiver’s amplifier is relieved of
having to reproduce the difficult low bass signals that can drive the receiver into audible distortion.
Use an RCA cable (not included), as shown, to connect your digital receiver’s subwoofer output to the subwoofer. Set the
crossover to the bypass position and connect to line level in.
SUBWOOFER OUT
BACK OF RECEIVER
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If you do not wish to run RCA cables to your subwoofer, you may use speaker wire to connect the subwoofer in parallel
with your front/main speakers (see diagram below). The subwoofer does not present any additional load to your receiver.
Select “subwoofer-no” from your receiver’s set-up menu. This sends the subwoofer signal to the front/main left and right
speakers, and thus, to the subwoofer. Consult your receiver’s owner’s manual for more details.
When using the speaker wire hookup, the subwoofer’s built-in crossover is engaged. As a starting point, set the
crossover control on the subwoofer about at roughly the lower limit of your front/main speakers’ bass response. Fine-
tune the crossover setting by ear for the smoothest blend with your front/main speakers. The best setting of the
crossover control will depend on speaker placement and personal preference.
Connecting the Subwoofer to Stereo or Dolby® Pro Logic® Systems
For stereo or Dolby Pro Logic systems, the easiest method is to use speaker wire connections as shown.
to main speakers
right
left
front
speakers
BACK OF RECEIVER
Be sure to connect + to + (red) and – to – (black).
When using the speaker wire hookup, the subwoofer’s built-in crossover is engaged. As a starting point, set the
crossover control on the subwoofer at roughly the lower limit of your front/main speakers’ bass response. Fine-tune the
crossover setting by ear for the smoothest blend with your front/main speakers. The best setting of the crossover control
will depend on speaker placement and personal preference.
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Controls
Volume: Adjusts the sound level of the subwoofer. A typical setting is around 10 o’clock.
Crossover (Hz): Adjusts the frequency of the low-pass filter for the subwoofer.
Polarity (0° or 180°): Selects regular (0°) or inverted (180°) polarity for the subwoofer. Set this switch to provide the
fullest, most dynamic bass. The effect of phase will be most audible on low-frequency percussion instruments or music
with a continuously repeating bass line.
Power off/on: Switches the amplifier on and off. Once switched to the “on” position, the PV350’s auto-on circuitry
turns the subwoofer on when a signal is presented, and turns it off after no signal is detected for several minutes.
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Placement
Place the subwoofer next to a wall or in a corner near your front/main speakers. Typically, the sound is best when the sub-
woofer is within 15 feet (5m) of the front/main speakers. However, the sharp 24dB/octave crossover roll-off permits place-
ment farther from the front/main speakers if necessary. Since the ear is unable to localize the low frequencies of the sub-
woofer, the bass still appears to come from the front/main speakers. In most cases, the subwoofer may be placed anywhere
in the listening room.
The level of bass output from the subwoofer will vary at different positions in a room. When placed near walls, its loudness
is emphasized. Corner placement provides the most bass output, while placement near only one wall will provide some-
what less bass. Placement completely away from walls may produce too little bass. Regardless of how you place the sub-
woofer, you can adjust the subwoofer’s level with its rear panel level controls. If you move the subwoofer, recheck the
setting of the polarity switch. Use the setting that yields the louder and more dynamic sound.
IMPORTANT: Do not place the subwoofer where there is a chance of contact between the rear panel and drapes or
furniture. Avoid obstructing air flow to the back of the PV350.
Position PV350 in corner
for maximum bass output
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If Service Seems Necessary
First, contact the dealer from whom you purchased the PV350. If that is not possible, write to:
Customer Service
Boston Acoustics, Inc.
300 Jubilee Drive
Peabody, MA 01960 U.S.A.
Or contact us via e-mail at:
We will promptly advise you of what action to take. If it is necessary to return your subwoofer to the factory, please ship it prepaid. After it has been
repaired, we will return it freight prepaid in the U.S. and Canada.
If Speaker Wire Connections Cause the Subwoofer to Hum
Certain receivers use speaker grounding circuits that may be incompatible with the speaker level inputs of external powered audio products, such as
powered subwoofers. When speaker wire is used instead of line level cables, this incompatibility can result in an audible hum when the receiver is turned
off or switched to a different speaker channel.
If this should happen with your Boston Acoustics subwoofer, you will need to make a ground cable and connect it to the RCA line input on the subwoofer
and any unused RCA line input or output on your receiver (see diagram). The proper ground cable for this application should consist of two male RCA
plugs that have theirnegative outside terminals (or “sleeve”) connected to each other by any length of single conductor copper cable. The inside posi-
tive (or “pin”) terminals should not be wired or removed in either plug.
If you do not wish to make your own grounding cable, please contact the Boston Acoustics Customer Service Department directly (see below) and we
will promptly ship one to you of suitable length at no charge.
single conductor (-) RCA to (-) RCA ground cable
RCA jack
use any
available
RCA jack
BACK OF RECEIVER
BACK OF SUBWOOFER
BassTrac, Boston, Boston Acoustics are registered trademarks of B o s t o n
Acoustics, Inc. Dolby and Dolby Pro Logic are registered trademarks of
Dolby Laboratories Licensing Corporation.
300 Jubilee Drive
Peabody, MA 01960 U.S.A.
978.538.5000
bostonacoustics.com
© 2004 Boston Acoustics, Inc. All rights reserved.
Specifications subject to change without notice.
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042-002025-2
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