Boston Acoustics Speaker GTR12 User Manual

GTR - TunableRadiators  
 
Changing the tuning on the GTR TunableRadiators  
Subwoofer w/ GTR Enclosure Shape Examples  
Single Enclosure Design Example  
- GTR TunableRadiator  
Listed below are several single G5 subwoofer using a GTR  
Note: The GTR TunableRadiator is shipped from the factory in “Tuning Mode #2”.  
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  
GTR Tuning / Q-Tune Setting Matrix:  
and must be installed  
before use.  
Model:  
12" w/ GTR12  
10" w/ GTR10  
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  
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  
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  
Side  
Front  
Also included with all GTR TunableRadiators is the GTR Tuning Hardware, these parts are  
individually listed in the GTR TunableRadiator Tuning Hardware section.  
Square with Down-firing GTR  
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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