T |
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echnical |
Information |
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Specification: |
12.5LF |
10.5LF |
8.5LF |
Nominal Size |
12" (30cm) |
10" (25cm) |
8" (20cm) |
Mounting Cutout Diameter |
11" (280mm) |
9-1/8" (232mm) |
7-3/16" (183mm) |
Mounting Depth—Front Mounted |
5-5/8" (143mm) |
4-3/4" (121mm) |
4-1/16" (104mm) |
Mounting Depth—Rear Mounted |
6-3/8" (162mm) |
5" (127mm) |
4-11/16" (119mm) |
Recommended Amplifier Power |
50–1200 watts |
50–1100 watts |
50–750 watts |
Nominal Impedance |
2Ω/4Ω |
2Ω/4Ω |
2Ω/4Ω |
Recommended Enclosure Sizes: |
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Gross Internal Volume |
1.0ft3 (28 liters) |
0.5ft3 (14 liters) |
0.3ft3 (8.5 liters) |
-3dB Down Point (In-car) |
20Hz |
20Hz |
20Hz |
System "Q" (2Ω/4Ω) |
0.9/1.1 |
0.8/0.95 |
0.6/0.7 |
Recommended Enclosure Dimensions: |
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Height (Internal) |
10.5" (27cm) |
7.5" (19cm) |
6.5" (16cm) |
Width (Internal) |
13.0" (33cm) |
11.0" (28cm) |
9.0" (23cm) |
Depth (Internal) |
13.0" (33cm) |
11.0" (28cm) |
9.0" (23cm) |
We provide Theile/Small Parameters for those interested in studying subwoofers further. We do not recommend you use computer software to determine enclosure size or type. While high-end enclosure design software may be useful for preliminary engineering purposes, it cannot completely predict performance in a given vehicle and should not replace a real enclosure that has been tested and listened to in a car. The best a computer screen can do is give you a visual representation of what something sounds like. Please use our recommended enclosures for optimum performance.
Theile/Small Parameters: |
12.5LF(2Ω) 12.5LF(4Ω) 10.5LF(2Ω) 10.5LF(4Ω) 8.5LF(2Ω) |
8.5LF(4Ω) |
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Resonant Frequency (Fs) |
30Hz |
31Hz |
33Hz |
34Hz |
35Hz |
36Hz |
Equivalent Volume (Vas) |
84 liters |
84 liters |
35 liters |
35 liters |
21 liters |
21 liters |
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2.97ft3 |
2.97ft3 |
1.24ft3 |
1.24ft3 |
0.74ft3 |
0.74ft3 |
Total Q (Qts) |
0.45 |
0.57 |
0.44 |
0.53 |
0.33 |
0.40 |
Electrical Q (Qes) |
0.47 |
0.61 |
0.47 |
0.57 |
0.35 |
0.42 |
Mechanical Q (Qms) |
9.8 |
9.6 |
8.0 |
7.8 |
9.0 |
9.0 |
Compliance (Cms) |
230μm/N |
230μm/N |
255μm/N |
255μm/N |
330μm/N |
330μm/N |
Moving Mass (Mms) |
121g |
117g |
90g |
86g |
63g |
60g |
Cone Area (Sd) |
510cm2 |
510cm2 |
315cm2 |
315cm2 |
215cm2 |
215cm2 |
Voice Coil Diameter |
51mm |
51mm |
51mm |
51mm |
51mm |
51mm |
Voice Coil DCR (Re) |
1.6Ω |
3.1Ω |
1.6Ω |
3.1Ω |
1.6Ω |
3.1Ω |
Voice Coil Inductance @ 1kHz (Le) |
0.40mH |
0.55mH |
0.40mH |
0.55mH |
0.40mH |
0.55mH |
Linear Excursion—One Way (Xmax) |
8.5mm |
8.5mm |
8.5mm |
8.5mm |
8.5mm |
8.5mm |
Peak-to-Peak Max. Excursion |
40mm |
40mm |
35mm |
35mm |
35mm |
35mm |
Reference Efficiency (ηo) |
0.46 |
0.39 |
0.26 |
0.25 |
0.25 |
0.22 |
300 Jubilee Drive Peabody, MA 01960 978-538-5000 Fax: 978-538-5199
Specifications subject to change without notice. Boston and Boston Acoustics are registered trademarks of Boston Acoustics ©1999 Boston Acoustics, Inc. All rights reserved.
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