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Changing the tuning on the GTR TunableRadiators
Note: The GTR TunableRadiator
™
is shipped from the factory in "Tuning Mode #2".
1.Remove the dustcap.
2.Remove the center screw, lock
washer, and washer that hold the
mass to the GTR.
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)
4.Install the center screw, lock
washer, and washer and tighten.
5.Install the dustcap using all five
screws.
GTR TunableRadiator
™
Tuning Frequency Chart
For single recommended G5/GTR enclosures
Tuning Mode:
GTR12
Enclosure Volume:
1.0 Ft
3
Tuning Mode 1:
45Hz
Tuning Mode 2:
35Hz
Tuning Mode 3:
30Hz
Weight Chart
Small Tuning Mass
Tuning Mode 1:
X
Tuning Mode 2:
1
Tuning Mode 3:
X
Key:
X = No Mass Used
1 = One Mass Used
2 = Two Mass Used
GTR TunableRadiator
™
Tuning Hardware
Screw*
Lock Washer*
Washer*
Small Tuning Mass*
2 x Large Tuning Mass
(1 installed* / 1 in hardware pack)
*Pre-installed on GTR from factory
™
Subwoofer w/ GTR Enclosure Shape Examples
Listed below are several single G5 subwoofer using a GTR
TunableRadiator
™
Trapezoid
Side
Reverse
Warning: The dustcap is
a structural part of the
GTR
TunableRadiator
™
and must be installed
before use.
Top
Rectangle
GTR10
0.5 Ft
3
49Hz
Side
35Hz
Wedge
30Hz
Large Tuning Mass
X
1
2
Side
Square with Down-firing GTR
Side
enclosure shape examples.
Top
Front
Top
Front
Front
Single Enclosure Design Example
- GTR TunableRadiator
In-Car Response w/ Q-Tune
D
W
Enclosure Response
d
B
6
0
6 -
H
1 -
2
1 -
8
2 -
4
3 -
0
3 -
6
5
H
z
1
0
Model:
12" w/ GTR12
H = Height:
13" (33.0cm)
W = Width:
13" (33.0cm)
D = Depth:
10.5" (266.7cm)
Gross Volume:
1.0 Ft
3
(28.3L)
GTR Tuning / Q-Tune
™
Setting Matrix:
Model:
12" w/ GTR12
Tuning Mode 1:
45Hz / 42Hz@0.7
Tuning Mode 2 • :
35Hz / 34Hz@1.0
Tuning Mode 3:
30Hz / 30Hz@1.2
Enclosure dimensions are internal and include basket and GTR displacement
Tuning Assumes Boston G3, G2, or G1 Subwoofer
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
the GTR.
3
⁄
-inch thick M.D.F. is recommended as a minimum
4
*Recommended distance from sides and back walls of enclosure
†Q-Tune™ is a feature found on Boston GT Amplifiers
• Factory Tuning Mode
GTR TunableRadiator
™
Included Hardware
Model:
GTR12
Hex Key 2.5mm
1
T-Nut M4:
8
Lock Washer M4:
8
Mounting Screw M4:
8
Wood Screw M4 x 38mm:
8
Also included with all GTR TunableRadiators
™
is the GTR Tuning Hardware, these parts are
individually listed in the GTR TunableRadiator
™
Tuning Hardware section.
Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 USA
T: 978.538.5000 F: 978.538.5100 W: bostonacoustics.com
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.
™
™
5
0
1
0
0
5
0
0
10" w/ GTR10
9.5" (24.1cm)
9.5" (24.1cm)
9.75" (24.8cm)
0.5 Ft
3
(14.2L)
10" w/ GTR10
50Hz / 45Hz@0.7
35Hz / 34Hz@1.0
30Hz / 30Hz@1.2
GTR10
1
8
8
8
8
142-001933-2
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