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GTR - TunableRadiators
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Changing the tuning on the GTR TunableRadiators
Subwoofer w/ GTR Enclosure Shape Examples
Single Enclosure Design Example
- GTR TunableRadiator
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Listed below are several single G5 subwoofer using a GTR
Note: The GTR TunableRadiator is shipped from the factory in “Tuning Mode #2”.
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TunableRadiator enclosure shape examples.
In-Car Response w/ Q-Tune™
Enclosure Response
D
1.Remove the dustcap.
W
Trapezoid
dB
6
2.Remove the center screw, lock
washer, and washer that hold the
mass to the GTR.
0
-6
-12
-18
-24
-30
-36
H
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 below)
5 Hz
10
50
100
Model:
12" w/ GTR12
13" (33.0cm)
10" w/ GTR10
9.5" (24.1cm)
9.5" (24.1cm)
9.75" (24.8cm)
Side
Top
4.Install the center screw, lock
washer, and washer and tighten.
H = Height:
W = Width:
D = Depth:
Reverse
13" (33.0cm)
5.Install the dustcap using all five
screws.
10.5" (266.7cm)
3
3
Gross Volume:
1.0 Ft (28.3L)
0.5 Ft (14.2L)
Warning: The dustcap is
a structural part of the
GTR TunableRadiator
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GTR Tuning / Q-Tune Setting Matrix:
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and must be installed
before use.
Model:
12" w/ GTR12
45Hz / [email protected]
35Hz / [email protected]
30Hz / [email protected]
10" w/ GTR10
50Hz / [email protected]
35Hz / [email protected]
30Hz / [email protected]
Tuning Mode 1:
Top
Front
•
Tuning Mode 2 :
Tuning Mode 3:
Rectangle
Enclosure dimensions are internal and include basket and GTR displacement
Tuning Assumes Boston G3, G2, or G1 Subwoofer
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These enclosure shapes are examples and these dimensions can be modified provided that
the exact internal volume is retained and that there is adequate space behind the woofer and
GTR TunableRadiator Tuning Frequency Chart
For single recommended G5/GTR enclosures
the GTR.
3
⁄
4-inch thick M.D.F. is recommended as a minimum
Tuning Mode:
Enclosure Volume:
Tuning Mode 1:
Tuning Mode 2:
Tuning Mode 3:
GTR12
GTR10
*Recommended distance from sides and back walls of enclosure
†Q-Tune™ is a feature found on Boston GT Amplifiers
3
3
1.0 Ft
0.5 Ft
•
45Hz
35Hz
30Hz
49Hz
35Hz
30Hz
Side
Top
Factory Tuning Mode
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Wedge
GTR TunableRadiator Included Hardware
Model:
GTR12
GTR10
Hex Key 2.5mm
T-Nut M4:
Lock Washer M4:
Mounting Screw M4:
Wood Screw M4 x 38mm:
1
8
8
8
8
1
8
8
8
8
Weight Chart
Tuning Mode 1:
Tuning Mode 2:
Tuning Mode 3:
Small Tuning Mass Large Tuning Mass
X
1
X
1
2
X
Key:
X = No Mass Used
1 = One Mass Used
2 = Two Mass Used
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Side
Front
Also included with all GTR TunableRadiators is the GTR Tuning Hardware, these parts are
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individually listed in the GTR TunableRadiator Tuning Hardware section.
Square with Down-firing GTR
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Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 USA
T: 978.538.5000 F: 978.538.5100 W: bostonacoustics.com
GTR TunableRadiator Tuning Hardware
Screw*
Q-Tune, SureSet, 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.
© 2004 Boston Acoustics, Inc.
Lock Washer*
Washer*
142-001933-2
Small Tuning Mass*
Side
Front
2 x Large Tuning Mass
(1 installed* / 1 in hardware pack)
*Pre-installed on GTR from factory
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