Boston Acoustics G51244, G5124, G51044, G5104 User's Manual

G5 Specifications/Enclosure Recommendations

Model: G51244 G5124 G51044 G5104

Nominal Size: 12" 12" 10" 10"

RMS Power Handling: 450w 450w 450w 450w

Impedance: Dual 4ΩSingle 4ΩDual 4ΩSingle 4

Frequency Response: 20-350Hz 20-350Hz 24-350Hz 24-350Hz

(+/-3dB in car)

Mounting Cutout Diameter: 11 3/16" 11 3/16" 9 1/4" 9 1/4"

Mounting Depth: 7 3/8" 7 3/8" 6 3/4" 6 3/4"

Recommended Sealed 1.0 ft31.0 ft30.5 ft30.5 ft
Enclosure Volume*: (28.3L) (28.3L) (14.2L) (14.2L)

™

†

Q-Tune

: (HP & Q Setting) 2 8 H z @ 0 . 7 2 8 H z @ 0 . 7 33Hz@0.7 3 3 H z @ 0 . 7

Recommended Ported 2.0 ft32.0 ft31.3 ft31.3 ft
Enclosure Volume*: (56.6L) (56.6L) (36.8L) (36.8L)

(283mm) (283mm) (235mm) (235mm)

(187mm) (187mm) (171mm) (171mm)

3

3

Vent Diameter: 4" (10cm) 4" (10cm) 3" (7.6cm) 3" (7.6cm)

Vent Length: 14" (36cm) 14" (36cm) 11" (28cm) 1 1 " ( 2 8 c m )

Tuning Frequency: 33Hz 33Hz 34Hz 34Hz

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†

Q-Tune

: (HP & Q Setting) 3 3 H z @ 1 . 0 3 3 H z @ 1 . 0 34Hz@0.9 3 4 H z @ 0 . 9

*Enclosure volumes include basket and port displacement
†Q-Tune™is a feature found on Boston GT Amplifiers

G5 Thiele-Small Parameters

Model: G512-44 G512-4 G510-44 G510-4

Fs: (Hz) 28.88 28.88 29.65 32.37 32.37 34.51

Re: (Ohms) 1 . 5 5 6 . 2 0 3.33 1 . 5 4 6 . 1 6 3.28

Qms: 9.93 9.93 9.94 9.19 9.19 10.47

Qes: 0.49 0.49 0.62 0.50 0.50 0.58

Qts: 0.47 0.47 0.58 0.47 0.47 0.55

Vas: (Liters) 75.28 75.28 74.53 29.77 29.77 29.54

Mms: (Grams) 148.5 148.5 135.8 122.4 122.4 109.4

Cms: (µM/Newton) 215 215 213 198 198 197

Xmax: (Mm) 15.0 15.0 15.3 15.0 15.0 15.3

Xmech: (Mm) 45.0 45.0 45.0 45.0 45.0 45.0

Sd: (CM 2) 499 499 499 327 327 327

Bl: (Tesla-M) 9 . 1 5 1 8 .30 11.72 8 . 7 6 1 7 . 5 2 11.60

SPL Eff: (dB @ 1w/1m) 87.2 87.2 86.8 84.9 84.9 85.0

SPL Sen: (dB @ 2.83v) 9 4 . 3 8 8 . 3 9 0 . 6 9 2 . 0 8 6 . 0 8 8 . 9

P a r a l l e l S e r i e s P a r a l l e l S e r i e s

G512 Basket Dimensions

Ω

G510 Basket Dimensions

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.

042-001933-0

G5 - High Performance Subwoofers

GTR - TunableRadiators

™

Single G5 Enclosure Design Example - Sealed

Model: G512" G10"

H = Height: 10.5" (26.7cm) 7.5" (19.1cm)

W = Width: 13.0" (33.1cm) 11.0" (28.0cm)

D = Depth: 13.0" (33.1cm) 11.0" (28.0cm)

Gross Volume: 1.0 Ft3(28.3L) 0.5 Ft3(14.2L)

†

™

Q-Tune

: (HP & Q) 28Hz@0.707 33Hz@0.707

Enclosure dimensions are internal and include basket displacement

This enclosure shape is an example and these dimensions can be modified provided that the
exact internal volume is retained

3

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

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

Single G5 Enclosure Design Example - Ported

Model: G512" G510"

H = Height: 15.5" (39.8cm) 12" (30.5cm)

W = Width: 16.5" (42.0cm) 13.25" (33.7cm)

D = Depth: 14" (35.6cm) 14" (35.6cm)

P = Port Clearance*: 4" (10cm) 3" (7.6cm)

Gross Volume: 2.0 Ft3(56.6L) 1.3 Ft3(36.8L)

Port Diameter: 4" (10cm) 3" (7.6cm)

Port Length: 14" (36cm) 11" (28cm)

†

™

Q-Tune

: (HP & Q) 33Hz@1.0 34Hz@1.0

Enclosure dimensions are internal and include basket and port displacement

This enclosure shape is an example and these dimensions can be modified provided that the
exact internal volume is retained and that there is adequate space behind the vent (diameter
of port from the back and side walls)

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

G5 Included Hardware

Model: G21244 G2124 G21044 G2104

Hex Key 2.5mm 1 1 1 1

7.5-Amp Fuse: 2 2 2 2
T-Nut M4: 8 8 8 8
Lock Washer M4: 8 8 8 8
Mounting Screw M4: 8 8 8 8
Wood Screw M4 x 38mm: 8 8 8 8

Single G5 Enclosure Design Example

- GTR Tu n a b l e R a d i a t o r

Model: G512" w/ GTR12 G510" 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: G512" w/ GTR12 G510" w/ GTR10

Tuning Mode 1: 45Hz / 42Hz@0.7 50Hz / 45Hz@0.7

Tuning Mode 2•: 35Hz / 34Hz@1.0 35Hz / 34Hz@1.0

Tuning Mode 3: 30Hz / 30Hz@1.2 30Hz / 30Hz@1.2

Enclosure dimensions are internal and include basket and GTR displacement

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

SureSet™Fuse Configurations

G5124 / G5104G51244 / G51044

2-ohm operation 8-ohm operation 4-ohm

Note: The SureSet™feature utilizes standar d au tomotive ATC fus es to
select between ser ies or p arallel voice-coil operation (DVC on ly). T he
fuses also provid e voice-coil protection under tran sient conditions such
as accidental momentary overdrive. The fuses will not protect against
voice-coil f ailure resulting fro m long term high power abuse.

GTR TunableRadiator™Included Hardware

Model: GTR12 GTR10

Hex Key 2.5mm 1 1
T-Nut M4: 8 8
Lock Washer M4: 8 8
Mounting Screw M4: 8 8
Wood Screw M4 x 38mm: 8 8

Also included with all GTR TunableRadiators™is the GTR Tuning Hardware, these parts are
individually listed in the GTR TunableRadiator™Tuning Hardware section.

™

™

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.Ins tall the cen ter screw, lock
washer, and washer and tighten.

5.Install the dustcap using all five
screws.

Warning: The dustcap is
a structural part of the
GTR Tu n a b l e R a d i a t o r
and must be instal led
before use.

G5 w/ GTR Enclosure Shape Examples

Listed below are several single G5 subwoofer using a GTR
TunableRadiator™enclosure shape examples.

Trapezoid

Side Top

Reverse

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FrontTop

Rectangle

GTR TunableRadiator™Tuning Frequency Chart

For single recommended G5/GTR enclosures

Tuning Mode: GTR12 GTR10

Enclosure Volume: 1.0 Ft

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

3

0.5 Ft

3

Side Top

Wedge

Side Front

Square with Down-firing GTR

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

SPS™Removal and Installation

Please refer to the SPS™Removal / Installation instruction sheet for
information on disassembly and installation of the SPS™.

Side Front