Boston Acoustics SPG-TR, TunableRadiator SPG-TR Installation Instructions Manual

High performance TunableRadiator™for
use with the Boston SPG555 subwoofer

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W

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In-Car Response w/ Q-Tune

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Enclosure Response

SPG-TR TunableRadiator™Description

0º

45º

90º

-45º

Designed to work perfectly with the the Boston SPG555
subwoofer, the SPG-TR allows you to use the SPG555 in
a 1.0Ft3enclosure and delivers low bass similar to a

orted enclosure while maintaining the transient

p
response and compact size of a sealed enclosure.
Provided tuning masses allow you to customize the
response of the SPG-TR to best match your vehicle and
listening preference.

SPG-TR Specifications / Enclosure Recommendation

Model: SPG-TR

Nominal Size: 555cm

Mounting Cutout Diameter: Use Provided Cutout Template

Mounting Depth: 4" (102mm)

(includes required clearance behind SPG-TR)

Recommended TunableRadiator

™

Enclosure Volume*: 1.0 ft3(28.3L)

Q-Tune™: (HP & Q Setting) Use SPG-TR Tuning / Q-Tune

*Enclosure requires SPG555 (2Ω
SPG555 subwoofer and the SPG-TR TunableRadiator.

or 4Ω) and volume includes basket displacement for both the

2

™

Setting Matrix Below

PG-TR TunableRadiator

S

™

uning Frequency Chart

T

For The Recommended SPG555/SPG-TR Enclosure (1.0ft3)

Mode Type Tuning Freq. Small Tuning Mass Large Tuning Mass

uning Mode 1: 45Hz X X

T

uning Mode 2: 35Hz 1 1

T
Tuning Mode 3: 30Hz X 2

Key: X = No Mass Used, 1 = One Mass Used, 2 = Two Mass Used

Changing The Tuning On The SPG-TR TunableRadiator

Note: The SPG-TR TunableRadiator™is shipped from the factory in “Tuning Mode #2”.

™

1.Remove the six screws u. Lift the

u

dustcap off of the SPG-TR

v.

2.On the bottom side of the dustcap
w, remove the center screw, lock
washer, and washer that hold the
mass to the dustcap.

v

3.Select the desired tuning mode by
placing the correct combination of
mass, foam side down, on the
center shaft. (use the tuning guide

located above)

w

4.Install the center screw, lock

washer, and washer and tighten.

SPG-TR Tuning / Q-Tune™Setting Matrix

Model: Tuning Q-Tune™Setting

Tuning Mode 1: 45Hz 42Hz@0.7

Tuning Mode 2*: 35Hz 34Hz@1.0

Tuning Mode 3: 30Hz 30Hz@1.2

*

Factory Tuning Mode

SPG555 / SPG-TR Enclosure Design Example

Model: SPG555 w/ SPG-TR

H = Height: 13" (33.0cm)

W = Width: 13" (33.0cm)

D = Depth: 10.5" (26.7cm)

Gross Volume: 1.0 Ft3(28.3L)

™

†

Q-Tune

Enclosure dimensions are internal and include displacement for both SPG555 & SPG-TR.
The enclosure shape is an example and these dimensions can be modified provided the exact

internal volume is retained and there is adequate clearance behind the SPG555 and the SPG-TR.

3

⁄4-inch thick M.D.F. is recommended as a minimum

†Q-Tune™ is a feature found on Boston GT Amplifiers

: (HP & Q Setting) Use

Setting Matrix Above

SPG-TR Tuning / Q-Tune

5.Re-install the dustcap and gasket

using all six screws.

Warning: The dustcap is a structural part
of the SPG-TR and must be installed
before use.

SPG-TR Handle Installation Instructions

1.The handle is held in place by two

u

screws (included in the hardware
kit). The handle can be positioned
eight different ways

Line up the handle with two of the

2.

u.

six screw holes on the dustcap.
Using the provided 2.5mm tool,

v

hand tighten the screws

v. The
specific orientation of the handle
will not effect performance,
however

, to ensure proper tuning,
must be installed prior to using the
SPG-TR.

arning: Choose the position of the handle wisely

W
where the screw is installed. Although not visible with the handle installed in the original position, if the handle is
moved, you will be able to see the enlarged screw holes from the previous install position.

. Installing the screws into the dustcap will mar the area around

SPG-TR TunableRadiator™Tuning Hardware

Screw*

Small T

Lock Washer*
Washer*

™

Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 USA

T: 978.538.5000 F: 978.538.5100 W: bostonacoustics.com

Q-Tune and TunableRadiator are trademarks and Boston, Boston Acoustics, and the Boston Acoustics
logo are registered trademarks of Boston Acoustics, Inc. Specifications are subject to change without
notice. All rights reserved. Covered by patents issued and/or pending.
© 2008 Boston Acoustics, Inc.

2 x Large T

(1 installed* / 1 in hardware pack)

*Pre-installed on SPG-TR from factory

uning Mass*

uning Mass

142-003133-0