Boston Acoustics 800 User Manual

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ProSeries 12.5LF 10.5LF 8.5LF

Competitor Series 1500 1200 1000 800

Generator Series GS1500 GS1200 GS1000

Boston Acoustics Subwoofer

Installation Manual

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

 

 

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—notthe 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.

2

 

 

 

 

 

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:

 

 

ProSeries

 

Competitor Series

 

Generator Series

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sealed Enclosures

12.5LF

10.5LF

8.5LF

1500

1200

1000

800

GS1500

GS1200

GS1000

 

Gross Internal Volume

1.0ft3

0.5ft3

0.3ft3

1.5ft3

1.0ft3

0.5ft3

0.3ft3

2.5ft3

1.5ft3

.75ft3

 

-3dBDownPoint—InCar

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

2.5ft3

1.5ft3

1.25ft3

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"

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Calculating your enclosure volume:

Internal dimensions

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

Gross Internal Volume (cubic inches)

= Gross Internal Volume (cubic feet)

1728

or:

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

= Gross Internal Volume (liters)

1000

Conversion Formulas

1" = 2.54cm

1ft3 = 28.32 liters 1ft3 = 1,728in3

D

W

Remember to account for material thickness when

H

determining external dimensions.

 

4

Building an Enclosure

Use at least 34-inchMDF to build the enclosure(1-inchis preferable). The joints should be liberally glued with carpenter’s wood glue and screwed together with wood screws and sealed internally with a bead of silicone rubber 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 enclosure. Even small leaks can have a dramatic effect on subwoofer performance. Look, listen, and test for leaks at all joints, around the subwoofer perimeter, and at the wire entrance location.

Glue

Screws

Sealant

5

Locating Subwoofer Enclosure

in Vehicle

The placement of the enclosure is one of the most important factors concerning installation. As each vehicle’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 output. 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 accident or sudden stop.

6

Sedans

Provide as clear a path as possible into the cabin by venting through a folded-downarm 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 blocking the subwoofer.

Sedan Installation

7

Wiring

2 ohm subwoofers

One 2Ω sub Two 2Ω subs, series Two 2Ω subs, parallel

Three 2Ω subs, series

Four 2Ω subs, series/parallel

8

Wiring

4 ohm subwoofers

One 4Ω sub Two 4Ω subs, parallel Three 4Ω subs, parallel

Four 4Ω subs, series/parallel

Four 4Ω subs, parallel

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ProSeries

 

 

Competitor Series

Specifications

12.5LF

10.5LF

8.5LF

1500

 

 

 

 

 

Nominal Size

12" (30cm)

10" (25cm)

8" (20cm)

15" (38cm)

 

 

 

 

 

Mounting Cutout Diameter

11" (280mm)

918" (232mm)

7316" (183mm)

1378" (353mm)

 

 

 

 

 

Mounting Depth—FrontMounted

558" (143mm)

434" (121mm)

4116" (104mm)

734" (197mm)

 

 

 

 

 

Mounting Depth—RearMounted

638" (162mm)

5" (127mm)

41116" (119mm)

814" (210mm)

 

 

 

 

 

Recommended Amplifier Power

50–1200watts

50–1100watts

50–750watts

50–1000watts

 

 

 

 

 

Nominal Impedance

2Ω/4Ω

2Ω/4Ω

2Ω/4Ω

2Ω/4Ω

 

 

 

 

 

 

ProSeries

 

 

 

 

Competitor Series

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

 

2.97ft3

2.97ft3

1.24ft3

1.24ft3

0.74ft3

0.74ft3

5.47ft3

5.47ft3

 

 

 

 

 

 

 

 

 

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)

510cm2

510cm2

315cm2

315cm2

215cm2

215cm2

876cm2

876cm2

Voice Coil Diameter

51mm

51mm

51mm

51mm

51mm

51mm

51mm

51mm

 

 

 

 

 

 

 

 

 

Voice Coil DCR (Re)

1.6Ω

3.1Ω

1.6Ω

3.1Ω

1.6Ω

3.1Ω

1.6Ω

3.2Ω

Voice Coil Inductance @ 1kHz (Le)

0.40mH

0.55mH

0.40mH

0.55mH

0.40mH

0.55mH

0.45mH

0.62mH

Linear Excursion—OneWay (Xmax)

8.5mm

8.5mm

8.5mm

8.5mm

8.5mm

8.5mm

5.5mm

5.5mm

Peak-to-PeakMaximum 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

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–endenclosure design software may be useful for 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. Please use our recommended enclosures for optimum performance.

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