Boston Acoustics 10.5LF Manuale utente

Boston Acoustics Subwoofer

Installation Manual

ProSeries 12.5LF

10.5LF

8.5LF

Competitor Series 1500

1200

1000

800

Generator Series GS1500

GS1200

GS1000

Congratulations!

You have purchased the finest automotive subwoofer the

industry has to offer. Installed correctly, the ProSeries

subwoofers will offer unprecedented performance for

many years to come.

Warning

This manual explains only the basic installation of the

subwoofers—not the techniques required to perform the

installation. If you do not have the experience that these

procedures require, we strongly suggest you consult your

Boston Acoustics dealer about professional installation.

Table of Contents

Enclosure Recommendations 3

Building an Enclosure 5

Locating Subwoofer Enclosure In Vehicle 6

Hatchbacks/Sport Utility Vehicles 6

Sedans 7

Wiring 8

2 ohm subwoofers 8

4 ohm subwoofers 9

Specifications 10

Theile/Small Parameters 10

Enclosure Recommendations

The ProSeries and Competitor Series subwoofers are

designed to deliver optimum performance in small

sealed enclosures. The Generator Series subwoofers are

designed for either sealed or ported enclosures. The fol-

lowing are the recommended enclosure volumes:

Sealed Enclosures 12.5LF 10.5LF 8.5LF 1500 1200 1000 800 GS1500 GS1200 GS1000

Gross Internal Volume 1.0ft30.5ft30.3ft31.5ft31.0ft30.5ft30.3ft32.5ft31.5ft3.75ft3

-3dB Down Point—In Car 20Hz 20Hz 20Hz 20Hz 20Hz 20Hz 20Hz 20Hz 20Hz 20Hz

System "Q" (2Ω) 0.9 0.8 0.6 1.36 1.03 0.92 0.69 1.63 1.38 1.18

(4Ω) 1.1 0.95 0.7 1.56 1.12 0.98 0.73 1.5 1.29 1.09

Recommended Enclosure Dimensions (Internal)

Height 10.5" 7.5" 6.5" 10" 10.5" 7.5" 6.5" 20" 16" 12"

Width 13.0" 11.0" 9.0" 16" 13.0" 11.0" 9.0" 16" 14" 11"

Depth 13.0" 11.0" 9.0" 16" 13.0" 11.0" 9.0" 13.5" 12" 9.75"

Ported Enclosures (Generator Series only) GS1500 GS1200 GS1000

Gross Internal Volume 2.5ft31.5ft31.25ft3

Tuning Frequency 35Hz 35Hz 33Hz

Port Diameter 4"D 3"D 3"D

Port Length 11"L 7.3"L 11"L

Recommended Enclosure Dimensions (Internal)

Height 20" 16" 14"

Width 16" 14" 11.5"

Depth 13.5" 12" 14"

ProSeries Competitor Series Generator Series

Calculating your enclosure volume:

Internal dimensions

Height (inches) x Width (inches) x Depth (inches) = Gross Internal Volume (cubic inches)

Remember to account for material thickness when

determining external dimensions.

Gross Internal Volume (cubic inches)

1728

or:

= Gross Internal Volume (cubic feet)

= Gross Internal Volume (liters)

Height (cm) x Width (cm) x Depth (cm)

1000

Conversion Formulas

1" = 2.54cm

1ft3= 28.32 liters

1ft3= 1,728in3

Building an Enclosure

Use at least 3

⁄4-inch MDF to build the enclosure (1-inch is

preferable). The joints should be liberally glued with car-

penter’s wood glue and screwed together with wood

screws and sealed internally with a bead of silicone rub-

ber or hot melt glue.

Drill pilot holes to prevent the wood from splitting and

tighten the screws as much as possible. Excess glue can

be wiped off with a damp sponge or paper towel.

Warning

It is extremely important to completely seal the enclo-

sure. Even small leaks can have a dramatic effect on sub-

woofer performance. Look, listen, and test for leaks at all

joints, around the subwoofer perimeter, and at the wire

entrance location.

Screws

Glue

Sealant

Locating Subwoofer Enclosure

in Vehicle

The placement of the enclosure is one of the most

important factors concerning installation. As each vehi-

cle’s interior acoustics are different, experimentation is

the key to optimizing performance.

Hatchbacks/Sport Utility Vehicles

Locate the enclosure in a rear corner for maximum out-

put. Experiment with the subwoofer’s placement.

Hatchback Installation

Warning

Make sure the enclosure is securely mounted in such a

way as to not shift or fly forward in the event of an acci-

dent or sudden stop.

Sedans

Provide as clear a path as possible into the cabin by

venting through a folded-down arm rest, venting through

the rear deck, or venting through an unused speaker

opening in the rear deck. Keep any restrictive materials

such as wood, hard plastic or metal from directly block-

ing the subwoofer.

Sedan Installation

Wiring

2 ohm subwoofers

One 2Ωsub Two 2Ωsubs, series Two 2Ωsubs, parallel

Three 2Ωsubs, series Four 2Ωsubs, series/parallel

Wiring

4 ohm subwoofers

One 4Ωsub Two 4Ωsubs, parallel Three 4Ωsubs, parallel

Four 4Ωsubs, series/parallel Four 4Ωsubs, parallel

We provide Theile/Small Parameters for those interested in

studying subwoofers further. We do not recommend you use

computer software to determine enclosure sizes or type.

While high–end enclosure design software may be useful for

engineering purposes, it cannot completely predict perform-

ance in a given vehicle and should not replace a real enclosure

that has been tested and listened to in a car. Please use our

recommended enclosures for optimum performance.

Specifications 12.5LF 10.5LF 8.5LF 1500

Nominal Size 12" (30cm) 10" (25cm) 8" (20cm) 15" (38cm)

Mounting Cutout Diameter 11" (280mm) 91⁄8" (232mm) 73⁄16" (183mm) 137⁄8" (353mm)

Mounting Depth—Front Mounted 55⁄8" (143mm) 43⁄4" (121mm) 41⁄16" (104mm) 73⁄4" (197mm)

Mounting Depth—Rear Mounted 63⁄8" (162mm) 5" (127mm) 411⁄16" (119mm) 81⁄4" (210mm)

Recommended Amplifier Power 50–1200 watts 50–1100 watts 50–750 watts 50–1000 watts

Nominal Impedance 2Ω/4Ω2Ω/4Ω2Ω/4Ω2Ω/4Ω

Theile/Small Parameters 12.5LF 12.5LF 10.5LF 10.5LF 8.5LF 8.5LF 1500 1500

(2Ω) (4Ω)(2Ω)(4Ω)(2Ω)(4Ω)(2Ω)(4Ω)

Resonant Frequency (Fs)30Hz 31Hz 33Hz 34Hz 35Hz 36Hz 34Hz 35Hz

Equivalent Volume (Vas)84 liters 84 liters 35 liters 35 liters 21 liters 21 liters 155 liters 155 liters

2.97ft32.97ft31.24ft31.24ft30.74ft30.74ft35.47ft35.47ft3

Total Q (Qts )0.45 0.57 0.44 0.53 0.33 0.40 0.72 0.85

Electrical Q (Qes)0.47 0.61 0.47 0.57 0.35 0.42 0.81 0.97

Mechanical Q (Qms)9.8 9.6 8.0 7.8 9.0 9.0 8.3 8.3

Compliance (Cms)230µm/N 230µm/N 255µm/N 255µm/N 330µm/N 330µm/N 142µm/N 142µm/N

Moving Mass (Mms)121g 117g 90g 86g 63g 60g 148g 145g

Cone Area (Sd) 510cm2510cm2315cm2315cm2215cm2215cm2876cm2876cm2

Voice Coil Diameter 51mm 51mm 51mm 51mm 51mm 51mm 51mm 51mm

Voice Coil DCR (Re)1.6Ω3.1Ω1.6Ω3.1Ω1.6Ω3.1Ω1.6Ω3.2Ω

Voice Coil Inductance @ 1kHz (Le)0.40mH 0.55mH 0.40mH 0.55mH 0.40mH 0.55mH 0.45mH 0.62mH

Linear Excursion—One Way (Xmax)8.5mm 8.5mm 8.5mm 8.5mm 8.5mm 8.5mm 5.5mm 5.5mm

Peak-to-Peak Maximum Excursion 40mm 40mm 35mm 35mm 35mm 35mm 40mm 40mm

Reference Efficiency (ηo)0.46 0.39 0.26 0.25 0.25 0.22 0.73 0.64

ProSeries Competitor Series

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