Boston Acoustics GT-424-Channel User Manual

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GT-42

4-Channel,High-Current/High-PowerAmplifier

Table of Contents

Parts List

3

Features and Specifications

3

Control Functions

4

Control functions (cont.)

5

Control functions (cont.)

6

Mechanical Functions

6

Control cover removal and reinstallation

6

Multi-positionmounting feet

6

Mechanical functions (cont.)

7

Amplifier linking

7

Wire connection

7

Fuses

7

General Installation Precautions

8

Before you install

8

Battery and charging system

8

Wire routing

8

Installation—AmplifierMounting

9

Choose the mounting location

9

Installation—amplifiermounting (cont.)

10

Passenger and trunk compartment mounting

10

Installation—Fusesand Wiring

10

Amplifier fuses

10

Wire gauge

10

Installation—fusesand wiring (cont.)

11

Power/B+ and power/ground connection

11

Remote input connection

11

Speaker output connection

11

Installation—fusesand wiring (cont.)

12

Mono subwoofer operation

12

Setup Tuning—Full-RangeSpeakers

12

Music

12

Front and rear sensitivity controls

12

Front and rear crossover controls

12

Setup tuning—full-rangespeakers (cont.)

13

Head unit

13

Volume

13

Front input sensitivity control

13

Front crossover controls

13

Setup tuning—full-rangespeakers (cont.)

14

Q-factoradjustments

14

Rear input sensitivity and crossover controls

14

Setup Tuning—RearFill Speakers and Subwoofers

14

Subwoofer level control

14

Rear input switch

14

Setup tuning—rearfill speakers and subwoofers (cont.)

15

Head unit

15

Volume

15

Rear input sensitivity control

15

Rear crossover control

15

Phase

15

System Examples

16,17

Amplifier Troubleshooting Guide

18

Contact and Warranty Information

19

2

Parts List

Included Hardware

(1) owner’s manual

(1) female quick-connectterminal for remote input

(1) 2mm hex wrench (for speaker input)

(1) 3mm hex wrench (for power input)

(6) mounting screws

Features and Specifications

GT-42Features

4-Channel,High-CurrentAmplifier

2Ω Bridge Stable (Mono) Operation

Power Increase with Input Voltage Rise

Advanced Cooling Allows Varied Mounting Positions

Adjustable Feet for Varied Mounting Surfaces

Security Cover Protects Control Settings

24dB or 12dB Octave Lowpass Setting

Continuously Variable Crossover and Q-factorSettings

Selectable Highpass Front Channels

Selectable Mono/Stereo Rear or Subwoofer Lowpass

Selectable Rear Channel Signal Derived from Front Channel Input

Optional Remote Subwoofer Control

Enhanced Switching Assignments

GT-42Specifications

14.4VDC Power

@ 4 Ohms

4x100W

@ 2 Ohms

4x150W

@ 4 Ohms (mono)

2x300W

@ 2 Ohms (mono)

2x450W

 

 

12.6VDC Power

 

@ 4 Ohms

4x75W

@ 2 Ohms

4x120W

@ 4 Ohms (mono)

2x250W

@ 2 Ohms (mono)

2x350W

 

 

14.4VDC Multi-channelPower

2x100W (4 ohm), 1x450W (2 ohm)

12.6VDC Multi-channelPower

2x75W (4 ohm), 1x350W (2 ohm)

Frequency Response (-3dB)

10Hz–95kHz

Signal-to-NoiseRatio (A Weighted)

>100dB

Dimensions

21/4x215/8x87/8” (57 x 548 x 225mm)

3

Control Functions

 

3

 

5

9

 

 

12

 

10

 

STEREO

SEND

OFF

ON

STEREO

MONO

OFF

ON

 

OFF

ON

 

INPUT

 

 

 

 

 

 

 

 

 

 

REAR

 

HIGHPASS

REAR INPUT

L

SUBWOOFER LEVEL

LOWPASS SLOPE

LOWPASS

 

FRONT INPUT

 

 

 

 

3 5 0

6

 

 

 

12dB 12dB 24dB

3 5 0

 

 

 

 

 

 

 

ST

MONO

 

 

 

2 0 0

Hz

 

 

 

 

 

2 0 0

Hz

 

 

 

2 0

 

 

 

 

 

 

5 0

MONO

MONO

0 . 2

1 . 2

0 . 2

L

R

L

R

INPUT SENSITIVITY 2 . 6

V

0 . 9 5

Q/HP

INPUT SENSITIVITY 2 . 6

 

V

 

 

5

 

0 . 7

 

 

5

 

REMOTE

 

 

REMOTE SUBWOOFER LEVEL

 

 

FRONT SPEAKER OUTPUT

REAR SPEAKER OUTPUT

 

4

 

 

 

4

N O N P R I N TA B L E A R E A

 

 

 

 

 

 

 

FUSE 3 x 25A

B+

B+

GND

GND

12 . 6 – 14 . 4VDC

GROUND

1

 

11

7

 

 

 

 

2

 

 

 

 

 

 

S TAT U S

 

 

M O N O

 

MONO

 

 

12

FRONT SPEAKER OUTPUT

REAR SPEAKER OUTPUT

 

 

ON

L

R

L

R

 

 

SAFE

 

 

 

 

 

8

1 FRONT RCA Inputs

RCA cables marked “FRONT” from head unit or from other line level device should be connected here. Use both inputs (L & R) for stereo.

2 FRONT Remote Input

Use the supplied FEMALE quick connector to connect the REMOTE trigger lead from the head unit to the amplifier. Amplifier turns “ON” when head unit is turned “ON.” One FEMALE .210" connector is supplied with amplifier.

3 FRONT Input Switch

In the left position, the L & R inputs go to the FRONT L & R channels of the amplifier. In the right position, the L & R inputs go to the FRONT and REAR L & R channels of the amplifier.

4 FRONT and REAR Sensitivity

Turn control clockwise to increase the amplifier sensitivity to incoming signals. Turn control counterclockwise to decrease the amplifier sensitivity.

5 FRONT Highpass Crossover Controls

To use 12dB/octave crossover, move switch to right-handposition. Highpass crossover frequency is adjustable from 20Hz to 350Hz by rotary control. (Moving switch toleft-handposition will bypass crossover functions.)

1 2 . 6 – 1 4 . 4 V D C

G RO U N D

B +

B +

G N D

G N D

1

2

4

Control Functions (cont.)

6 “Q” Control

“Q” Control is active when the highpass crossover is engaged and is centered on the selected crossover point. The range of operation is 0.7–1.2.

dB

Q

+1.6dB

0dB

-3dB

.707 .95 1.2

t (tuned crossover frequency)

7 REAR RCA Inputs

RCA cables marked “REAR” from head unit or other line level device should be connected here. Use both inputs (L & R) for stereo.

8 REAR Remote Input

This remote input is parallel to the FRONT remote input and does not need to be connected for the amplifier to operate. Use either remote input to turn the amplifier on. Do not connect 12V accessories to this input.

9 REAR Input Switch

In the left position, the L & R inputs go to the REAR L & R channels of the amplifier. In the right (MONO) position, the inputs are summed. Use this setting when the REAR channels are used with a subwoofer.

10 Lowpass Slope and Crossover Controls

Select appropriate crossover slope of 12 or 24dB/octave by

moving LOWPASS SLOPE switch. Lowpass crossover fre-

 

 

 

 

LOWPASS SLOPE

quencies are adjustable from 50Hz to 350Hz by rotary control.

 

 

12dB 12dB 24dB

Move filter switch to “ON” position to engage.

ST MONO

 

 

 

 

 

 

11 Status LED Indicators

GREEN indicates the normal operating condition; the amplifier is “ON.” GREEN and RED together are normal when the amplifier is first turned “ON”; RED will turn off after a few seconds. When both GREEN and RED remain on, the amplifier is in thermal shutdown condition. RED only indicates a fault condition, “SAFE.”

7

8

OFF ON

LOWPASS

350

200

Hz

50

5

Control Functions (cont.)

12 Subwoofer Level Control and Port

Switch should be set to “OFF” when control circuit is not installed, (see optional “subwoofer level control” owner’s manual).

cover panel

Mechanical Functions

Recessed RCA Inputs

The input jacks are recessed into the body of the amplifier to provide clearance in tight mounting locations.

1 inch1 inch

Control Cover Removal and Reinstallation

The cover panel is secured with two (2) captive coin-slottedscrews.Coin-slottedscrews allow a coin edge to be used as a screwdriver to remove the panel.

Multi-positionMounting Feet

The mounting feet are designed to slide in both directions to clear installation obstructions on the mounting surface.

WARNING! Before driving the mounting screws through any surface, be sure of what is behind that surface. Check for the gas tank, brake lines, and any vehicle wiring harness.

Vents (Side and Rear)

The cooling vents must be kept clear of obstructions once the amplifier is installed. Failure to do this could lead to premature thermal shutdown or amplifier failure.

upper side vent lower side vent

6

Mechanical Functions (cont.)

Amplifier Linking

The design of the side panels enables multiple amplifiers to be used together without additional hardware.

GT-42

GT-20

Wire Connection

Amplifier accepts stripped wire directly into the terminal blocks. Speaker outputs accept 8-gauge,and the DC power and ground accept4-gauge.Tighten with supplied hex wrenches.

Fuses

Amplifier accepts standard AT-styleautomotive blade fuses.

FUSE 3 x 20A

7

General Installation Precautions

WARNING! Before driving the amplifier mounting screws through any surface, be sure of what is behind that surface. Check for the gas tank, brake lines, and any vehicle wiring harness. Never run wires outside or under the vehicle or where they could become broken or interfere with the safe operation of the vehicle.

Before You Install

Before you install the unit, disconnect the negative (–)battery cable in the engine compartment of the vehicle. Doing so will prevent damage to both the electrical system of the vehicle and the amplifier during installation.

Battery and Charging System

In order for the amplifier to function correctly, the electrical system of the vehicle should be professionally checked for overall electrical capacity. When used, the amplifier will increase the demand on the battery and alternator. Therefore both should be thoroughly evaluated before installing the amplifier to ensure they are in normal operating condition and able to handle the increased demand the amplifier will present to the vehicle’s electrical system.

Wire Routing

Do not run the power wire near any low-levelsignals or audio cables such as the RCAs from the head unit. (Noise can be introduced into the amplifier when this occurs.) It is helpful to diagram the wire layout first before any installation is attempted.

8

Installation—AmplifierMounting

Choose the Mounting Location

Plan your installation so that the amplifier is mounted where adequate ventilation is available.

Never mount an amplifier in the engine compartment of a vehicle!

WARNING! Before driving the mounting screws through any surface, be sure of what is behind that surface. Check for gas tank, brake lines, and any vehicle wiring harness.

13mm (1/2”)

225mm (87/8”)

GT-42

S TAT U S

M O N O

 

MONO

1 2 . 6 – 1 4 . 4 V D C

G RO U N D

57mm (21/4”)

L

R

L

R

B + B +

G N D G N D

FRONT SPEAKER OUTPUT

REAR SPEAKER OUTPUT

 

 

 

ON

 

 

 

 

 

 

SAFE

 

 

 

 

 

 

548mm (215/8”)

9

Installation—AmplifierMounting (cont.)

Passenger and Trunk Compartment Mounting

If the amplifier is mounted under a seat, be sure that the vents do not become blocked. Do not allow seat padding or other obstructive material to press down on the amplifier.

All Boston GT amplifiers have top panel controls. If the amplifier is mounted under a seat, position the amplifier so the cover panel can be removed with the seat forward or back to allow adjustment of the audio settings.

When mounting in a trunk, choose a location that will be protected from sliding cargo or other materials. Mount the amplifier to solid surfaces only. Do not mount to plastic trim panels. Do not mount the amplifier with Velcro, doublestick tape, or by wedging into position. Amplifier should be mounted using the movable mounting feet and the provided mounting screws.

Installation—Fusesand Wiring

Amplifier Fuses

Although the amplifier has internal fuses, additional fusing should be provided at the battery on the positive (+) power wire going to the amplifier. An inline fuse should be installed at no more than 18" (46cm) on the positive (+) power wire. The rating of the inline fuse should equal the value of the internal fuses of the amplifier if only the amplifier is connected to this wire. If other devices are connected to this wire, the fuse value should be of sufficient capacity to handle the demand.

FUSE 3 x 20A

Wire Gauge

The amplifier accepts up to 4-gaugestripped wire at the DC power and ground input terminals, and4-gaugeis recommended. Wire runs should be kept to the minimum practical length.

10

Installation—Fusesand Wiring (cont.)

Power/B+ and Power/GND Connection

Strip approximately 5/8" (16mm) of insulation. The positive (+) power wire is installed into the amplifier terminal marked “B+.” The negative(–)wire is installed into the terminal marked “GND.” The ground wire should be as short as possible and connected directly to the chassis of the vehicle. Make sure that the chassis connection point is free of rust, grease, dirt, paint, and other materials that may insulate the ground wire from making proper connection. Tighten the B+ and GND terminals with the supplied 3mm hex wrench to secure the wire into the terminals. If the power wire must be routed through a drilled or existing hole, use a nylon panel grommet to prevent fraying the wire insulation. Failure to do so could lead to an electrical short if the wire insulation is worn through and the power wire is shorted to ground.

1/4"

Strip 5/8" (16mm)

Remote Input Connection

Use the supplied FEMALE slide connector to connect the REMOTE trigger lead from the head unit to the amplifier. Crimp connector to wire from head unit that controls remote turn-on(refer to head unit owner’s manual). Once the slide connector is crimped into place, carefully push connector onto recessed male REMOTE terminal adjacent to the RCA Input pair. Only one (1) remoteturn-onterminal should be connected.

Speaker Output Connection

Prepare each wire by stripping approximately 5/8" (16mm) of insulation. The positive (+) speaker wire is installed into the amplifier terminal marked “SPEAKER OUTPUT” / “+.” The negative(–)speaker wire is installed into the amplifier terminal marked “SPEAKER OUTPUT” /“-.”Tighten the “Speaker Output”, “+”, and“-”terminals with the supplied 2mm hex wrench to secure the wire into the terminals. If the speaker wires must be routed through a drilled or existing hole, use a nylon panel grommet to prevent fraying the wire insulation. Failure to do so could lead to an electrical short if the wire insulation is worn through and the speaker wires are shorted to ground.

11

Installation—Fusesand Wiring (cont.)

Mono Subwoofer Operation

If the amplifier is to be bridged and used with a subwoofer connected to the REAR channels, use the “SPEAKER OUTPUT” terminals marked for mono use.

WARNING! Subwoofer impedance must not fall below 2 ohms when in MONO mode.

2-ohmminimum

Setup Tuning—Full-RangeSpeakers

1) Music

The material chosen for head unit/amplifier system setup must be both clear in recording quality and dynamic in amplitude. Many audiophile “test” discs have musical tracks with both of these characteristics and should be used.

2) FRONT and REAR Sensitivity Controls

Turn controls all the way counterclockwise (minimum position). In this position, the amplifier will be less sensitive to the input signal from the head unit.

3) FRONT and REAR Crossover Controls

Crossovers should be turned off during this phase of set-up.Move the HIGHPASS and FILTER switches to the “OFF”position—withthese settings,full-rangesignal is sent to the FRONT & REAR speaker outputs.

OFF

ON

 

OFF

ON

 

HIGHPASS

LOWPASS SLOPE

LOWPASS

 

12dB 12dB 24dB

 

 

350

350

 

ST

MONO

 

 

185

Hz

 

200

Hz

 

 

 

 

 

 

 

50

 

20

 

 

 

FRONT crossover control REAR crossover control

12

Setup Tuning—Full-RangeSpeakers (cont.)

4) Head Unit

The head unit should have all controls such as bass, treble, balance, and fader set to the flat or centered position. The volume control should be at the minimum setting. If the head unit has any equalization or bass management features such as boost, they should be defeated at this time. Turn head unit on, and verify that the GREEN status LED is lit on the amplifier.

5) Volume

With the chosen musical track playing, turn the head unit volume control up until the maximum level of undistorted signal is heard from the speakers. (For most head units, this will be near the end of the volume control range.)

WARNING! A distorted signal from the head unit sent to the amplifier can cause loudspeaker failure at higher listening levels!

6) FRONT Input Sensitivity Control

Slowly rotate control clockwise until maximum undistorted playing level is heard from the speakers. Listen closely for bottoming from the speakers. If detected, rotate FRONT Input Sensitivity counterclockwise until it is eliminated.

7) FRONT Crossover Controls

To achieve higher undistorted playing levels from the front speakers, the FRONT crossover must be engaged. Rotate crossover control fully clockwise. The highpass crossover point is now set at 350Hz. Rotate FRONT “Q” Control fully counterclockwise. Move crossover switch to the right (ON) position.

OFF ON

HIGHPASS

350

Slowly rotate FRONT input sensitivity control clockwise until maximum undis- 185 Hz torted playing level is heard from the speakers. Listen closely for bottoming

20

from the speakers. If detected, rotate FRONT input sensitivity control counterclockwise until it is eliminated. Slowly rotate FRONT highpass crossover con-

trol counterclockwise while listening for bottoming. You are lowering the crossover point, which means that more bass signal is being sent to the speakers. If bottoming is detected, Rotate FRONT input sensitivity control counterclockwise until it is eliminated and/or rotate the FRONT highpass crossover control clockwise to raise the crossover point.

13

Setup Tuning—Full-RangeSpeakers (cont.)

8) FRONT “Q” Control

Once the FRONT highpass crossover point has been determined, use the FRONT “Q” control to increase the bass information centered around the crossover point.

Setting the front “Q” control is done in conjunction with setting the levels on the input sensitivity and highpass crossover frequency controls. You may find while setting the “Q” that bottoming may be detected in the front speakers; lowering the “Q” input sensitivity or raising the highpass crossover point will eliminate this. Minor adjustments to each setting are required to fine-tunethe system.

Setting the “Q” is a subtle process. It is recommended that the “Q” setting be left in the 0.7 position and adjusted only after the input sensitivity and highpass crossover ranges are known. Small adjustments to the “Q” setting are all that are required to fine-tunethe system.

9) REAR Input Sensitivity and Crossover Controls

Setting levels for the rear channels proceeds the same as for the front except for the elimination of the “Q” control settings. Crossover selector switch must be set to “HP” and filter switch must be set to “ON.” If the loudspeaker being used is capable of full-rangeoperation, filter should be set to “OFF.”

 

OFF

ON

LOWPASS SLOPE

LOWPASS

12dB 12dB 24dB

350

ST

MONO

 

 

200

Hz

50

Setup Tuning—RearFill Speakers

You may set the rear channels for summed mono operation from the L & R REAR RCA inputs by setting the REAR INPUT switch to the right-handMONO position and then connecting the L & R REAR loudspeakers normally as you would for regular stereo operation. This configuration is beneficial for rear fill in some applications.

Setup Tuning—Subwoofers

1) SUBWOOFER LEVEL Control

Refer to subwoofer level control in owner’s manual. If the control is not used, SUBWOOFER LEVEL switch must be set to “OFF.”

2) REAR Input Switch

Move switch to the right-hand(MONO) position, the inputs are summed to mono. Connect the subwoofer to the REAR SPEAKER OUTPUT terminals marked for MONO operation. NOTE: Subwoofer impedance is 2 ohms minimum.

14

Setup Tuning—Subwoofers(cont.)

3) Head Unit

The head unit should have all controls such as bass, treble, balance, and fader set to the flat or centered position. The volume control should be at the minimum setting. If the head unit has any equalization or bass management features such as boost, they should be deactivated at this time. Turn head unit on, and verify that the GREEN status LED is lit on the amplifier.

4) Volume

With the chosen musical track playing, turn the head unit volume control up until the maximum level of undistorted signal is heard from the speakers. For most head units, this will be at the end of the volume control range.

WARNING! A distorted signal from the head unit sent to the amplifier can cause loudspeaker failure at higher listening levels!

5) REAR Input Sensitivity Control

Turn controls all the way counterclockwise (minimum position). In this position, the amplifier will be less sensitive to the input signal from the head unit. Slowly rotate this control clockwise until maximum undistorted playing level is heard from the subwoofers. Listen closely for faults such as bottoming from the subwoofer. If fault is detected, rotate REAR input sensitivity control counterclockwise until fault is eliminated. At this point, the maximum undistorted subwoofer playing level has been defined.

6) REAR Crossover Control

Move the selector switch to “LP” and the FILTER switch to “ON.” In this setting, lowpass signal is sent to the REAR speaker outputs. Select 12 or 24dB/octave.

7) PHASE

Subwoofer phase is relative to the front loudspeakers. Correct electrical phase does not always mean correct acoustic phase. Swap positive (+) and negative (-)connections at the speaker outputs where the subwoofer is connected to the amplifier. It is beneficial to listen to the subwoofer connected in both phase conditions. The subwoofer should be left in the condition in which the strongest bass response is noted.

15

System Examples

System A—Full-RangeFront withFull-RangeRear

 

to ground

 

to ground

 

fuse

 

to

+ battery terminal

 

 

fuse

to

+ battery terminal

 

5.6 FL

System B—Full-RangeFront with Rear Fill

5.6 FL

5.6 FL

 

to ground

 

to ground

 

fuse

 

to

+ battery terminal

 

 

fuse

to

+ battery terminal

 

FL5.6

 

 

 

 

 

 

6.5LF

16

System Examples (cont.)

System C—MainSpeakers with Single Subwoofer (2)

5.6 FL

5.6 FL

 

to ground

 

to ground

 

fuse

 

to

+ battery terminal

 

 

fuse

to

+ battery terminal

 

2

10.5LF

System D —MainSpeakers with Parallel 4Subwoofers (2load)

 

to ground

 

to ground

 

fuse

 

to

+ battery terminal

 

 

fuse

to

+ battery terminal

 

6.5LF

 

 

6.5LF

17

Amplifier Troubleshooting Guide

Status LEDs on Amplifier not LitHeadUnit (Source) Turned “ON”

Verify

Remote turn-onwire from source to amplifier has proper voltage

 

Power (B+) connections at amplifier, terminal blocks, and battery are secure

 

Ground (GND) connections at amplifier and vehicle chassis are secure

 

Battery B+ fuse is OK

 

Amplifier fuse is OK

 

B+ at battery and B+ at amplifier have proper voltage

Status LEDs Lit, no Output from SpeakersSpeakersin Normal Operating Condition

Verify

High-levelcables from speaker(s) to amplifier are securely connected

 

RCA cables from amplifier to source are securely connected

 

Sensitivity adjustment on amplifier is correctly adjusted

Engine Noise from Speaker(s)

 

Turn source “OFF”

 

Disconnect RCA cables at amplifier

 

If noise stops, check equipment & cables leading to amplifier

Verify

RCA cables are of good quality with no breakage to internal shields

 

RCA cables from source to amplifier are not run alongside power

Amplifier Output DistortedMusicnot Recorded with Intentional Distortion

Verify

Source output to amplifier is not distorted

 

Amplifier input sensitivity is correctly adjusted

Amplifier Shuts Down, Red and Green LEDs are LitAmplifieris in Thermal Protection Mode

Verify

Amplifier is mounted with adequate air circulation around vents

 

Amplifier does not have obstructions blocking back or side panel vents

 

Amplifier is not mounted under carpet

 

Speakers meet correct impedance for application (mono or stereo hookup)

Amplifier Does Not Turn “ON”, and Red LED is LitAmplifiernot Connected to a Shorted Speaker

Verify

Speaker crossover is not defective

 

High-levelcables from speaker to amplifier are not shorted

Amplifier Does Not Turn “ON”, and Red LED LitSpeakers,Crossovers, and Cable are OK

Amplifier requires service

18

Contact and Warranty Information

Limited Warranty (US)

For one (1) year from the date of purchase, Boston Acoustics will repair for the original owner any defect in materials or workmanship that occurs in normal use, without charge for parts and labor—whenpurchased from an authorized Boston Acoustics retailer.

If an authorized Boston Acoustics retailer installs your amplifier, the warranty will be extended one (1) additional year. Installation of the amplifier must be noted on the original purchase receipt. The receipt must be presented at the time a warranty claim is made.

Your responsibilities are to use the system according to the instructions supplied, to provide safe and secure transportation to an authorized Boston Acoustics service representative, and to present proof of purchase in the form of your sales slip when requesting service.

Excluded from this warranty is damage that results from abuse, misuse, accidents, shipping, or repairs or modifications by anyone other than an authorized Boston Acoustics service representative.

This warranty is void if the serial number has been removed or defaced.

This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.

If Service Seems Necessary

First, contact the dealer from whom you purchased the amplifier. If that is not possible, write to:

Boston Acoustics, Inc. 300 Jubilee Drive Peabody, MA 01960 U.S.A., or your authorized Boston Acoustics distributor

We will promptly advise you of what action to take. If it is necessary to return your unit to the factory, please ship it prepaid. After it has been repaired, we will return it freight prepaid in the U.S.A. and Canada.

www.bostonacoustics.com

300 Jubilee Drive Peabody, MA 01960 U.S.A.

(978) 538-5000

Boston, Boston Acoustics, and the Boston logo are registered trademarks of Boston Acoustics, Inc.

© 2003 Boston Acoustics, Inc. All rights reserved. Specifications subject to change without notice.

P/N 042-001630-1

19