Single Enclosure Design Example
-GTR TunableRadiator™
Model: 12" w/ GTR12 10" w/ GTR10
H=Height: 13" (33.0cm) 9.5" (24.1cm)
W = Width: 13" (33.0cm) 9.5" (24.1cm)
D=Depth: 10.5" (266.7cm) 9.75" (24.8cm)
Gross Volume: 1.0 Ft3(28.3L) 0.5 Ft3(14.2L)
GTR Tuning / Q-Tune™Setting Matrix:
Model: 12" w/ GTR12 10" w/ GTR10
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.
3⁄4-inch thick M.D.F. is recommended as a minimum
*Recommended distance from sides and back walls of enclosure
†Q-Tune™ is a feature found on Boston GT Amplifiers
•Factory Tuning Mode
Subwoofer w/ GTR Enclosure Shape Examples
GTR TunableRadiator™Included Hardware
Model: GTR12 GTR10
Hex Key 2.5mm 1 1
T-Nut M4: 8 8
Lock Washer M4: 88
Mounting Screw M4: 8 8
Wood Screw M4 x 38mm: 88
Also included with all GTR TunableRadiators™is the GTR Tuning Hardware, these parts are
individually listed in the GTR TunableRadiator™Tuning Hardware section.
GTR TunableRadiator™Tuning Hardware
Small Tuning Mass*
2xLarge Tuning Mass
(1 installed* / 1 in hardware pack)
Screw*
Lock Washer*
Washer*
*Pre-installed on GTR from factory
GTR TunableRadiator™Tuning Frequency Chart
For single recommended G5/GTR enclosures
Tuning Mode: GTR12 GTR10
Enclosure Volume: 1.0 Ft30.5 Ft3
Tuning Mode 1: 45Hz 49Hz
Tuning Mode 2: 35Hz 35Hz
Tuning Mode 3: 30Hz 30Hz
Weight Chart Small Tuning Mass Large Tuning Mass
Tuning Mode 1: X X
Tuning Mode 2: 1 1
Tuning Mode 3: X 2
Key:
X=No Mass Used
1=One Mass Used
2=Two Mass Used
Changing the tuning on the GTR TunableRadiators™
Note: The GTR TunableRadiator™isshipped 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.
Warning: The dustcap is
astructural part of the
GTR TunableRadiator™
and must be installed
before use.
Trapezoid
Rectangle
Reverse
Listed below are several single G5 subwoofer using a GTR
TunableRadiator™enclosure shape examples.
FrontTop
Side Top
Side Front
Side Top
Wedge
Side Front
Square with Down-firing GTR
142-001933-2
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.
