Boston Acoustics SPG555 manual Changing The Tuning On The SPG-TR TunableRadiator

SPG-TR TunableRadiator™ Description

SPG-TR TunableRadiator™ Tuning Frequency Chart

Designed to work perfectly with the the Boston SPG555

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

Mode Type

Tuning Freq.

Small Tuning Mass

Large Tuning Mass

subwoofer, the SPG-TR allows you to use the SPG555 in

Tuning Mode 1:

45Hz

X

X

a 1.0Ft3 enclosure and delivers low bass similar to a

Tuning Mode 2:

35Hz

1

1

ported enclosure while maintaining the transient

Tuning Mode 3:

30Hz

X

2

response and compact size of a sealed enclosure.

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

Provided tuning masses allow you to customize the

response of the SPG-TR to best match your vehicle and

Changing The Tuning On The SPG-TR TunableRadiator™

listening preference.

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

SPG-TR Specifications / Enclosure Recommendation

υ

1.Remove the six screws υ. Lift the

Model:

SPG-TR

dustcap off of the SPG-TR ϖ.

Nominal Size:

555cm2

2.On the bottom side of the dustcap

Mounting Cutout Diameter:

Use Provided Cutout Template

ϖ

ω, remove the center screw, lock

Mounting Depth:

4" (102mm)

washer, and washer that hold the

mass to the dustcap.

(includes required clearance behind SPG-TR)

Recommended TunableRadiator™

3.Select the desired tuning mode by

Enclosure Volume*:

1.0 ft3 (28.3L)

placing the correct combination of

mass, foam side down, on the

Q-Tune™: (HP & Q Setting)

Use SPG-TR Tuning / Q-Tune™

ω

center shaft. (use the tuning guide

Setting Matrix Below

located above)

*Enclosure requires SPG555 (2Ω or 4Ω) and volume includes basket displacement for both the

4.Install the center screw, lock

SPG555 subwoofer and the SPG-TR TunableRadiator.

washer, and washer and tighten.

SPG-TR Tuning / Q-Tune™Setting Matrix

5.Re-install the dustcap and gasket

Model:

Tuning

Q-Tune™Setting

using all six screws.

Tuning Mode 1:

45Hz

42Hz@0.7

Warning: The dustcap is a structural part

Tuning Mode 2*:

35Hz

34Hz@1.0

of the SPG-TR and must be installed

before use.

Tuning Mode 3:

30Hz

30Hz@1.2

SPG-TR Handle Installation Instructions

*Factory Tuning Mode

υ

90º

1.The handle is held in place by two

SPG555 / SPG-TR Enclosure Design Example

screws (included in the hardware

45º

kit). The handle can be positioned

0º

eight different ways υ.

D

In-Car Response w/ Q-Tune™

ϖ

-45º

2.Line up the handle with two of the

W

Enclosure Response

six

screw

holes on

the dustcap.

dB

Using the

provided

2.5mm tool,

6

hand tighten the screws ϖ. The

0

-6

specific orientation of the handle

H

will

not

effect

performance,

-12

-18

however, to ensure proper tuning,

-24

must be installed prior to using the

-30

SPG-TR.

-36

Warning: Choose the position of the handle wisely. Installing the screws into the dustcap will mar the area around

5 Hz 10

50

100

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.

Model:

SPG555 w/ SPG-TR

SPG-TR TunableRadiator™

Tuning Hardware

H = Height:

13" (33.0cm)

W = Width:

13" (33.0cm)

Screw*

Small Tuning Mass*

Lock Washer*

D = Depth:

10.5" (26.7cm)

Washer*

Gross Volume:

1.0 Ft3 (28.3L)

2 x Large Tuning Mass

Q-Tune™†: (HP & Q Setting)

Use SPG-TR Tuning / Q-Tune™

(1 installed* / 1 in hardware pack)

Setting Matrix Above

*Pre-installed on SPG-TR from factory

Enclosure dimensions are internal and include displacement for both SPG555 & SPG-TR.

Boston Acoustics, Inc. 300 Jubilee Drive,

Peabody, MA

01960 USA

The enclosure shape is an example and these dimensions can be modified provided the exact

T: 978.538.5000

F: 978.538.5100 W: bostonacoustics.com

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

Q-Tune and TunableRadiator are trademarks and Boston, Boston Acoustics, and the Boston Acoustics

3⁄4-inch thick M.D.F. is recommended as a minimum

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

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.

142-003133-0

© 2008 Boston Acoustics, Inc.