Rockford Fosgate P3 Shallow, P3 Shallow P3SD2-8, P3 Shallow P3SD2-10, P3 Shallow P3SD2-12, P3 Shallow P3SD4-8 Installation & Operation Manual

P3 SHALLOW - DVC - DUAL VOICE COIL SUBWOOFERS

Dual 2-Ohm P3SD2-8 P3SD2-10 P3SD2-12

Dual 4-Ohm P3SD4-8 P3SD4-10 P3SD4-12

Serial Number: Date of Purchase:

8" 10" 12"

Installation & Operation

SAFETY

CARTON CONTENTS

CAUTION: Before installation, disconnect the battery

negative (-) terminal to prevent damage
to the unit, fire and/or possible injury.

PRACTICE SAFE SOUND™

Continuous exposure to sound pressure levels over 100dB may

cause permanent hearing loss. High powered auto sound systems

may produce sound pressure levels well over 130dB. Use common

sense and practice safe sound.

RECOMMENDED ENCLOSURES

This manual outlines two specific types of enclosures that provide
distinctly different performance.This section is to help you decide
which type is best for your application.

SEALED ENCLOSURES

Sealed enclosures are the simplest to build.The most important part of
building a sealed enclosure is to make sure that the enclosure is airtight.
Using glue and some type of sealant on all seams will ensure solid
construction and prevent air leaks.The box volume will directly impact
the performance of the speaker. Larger enclosures will provide flatter
response and deeper bass where smaller boxes will provide a bump in
the response curve and generally higher output for greater SPL.

 (1) Punch P3 Shallow Series Subwoofer
 (1) Painted aluminum decorative trim ring
 (8) Socket head wood screws
 (1) Socket head driver bit

BUILDING AN ENCLOSURE

To work properly, the walls of the enclosure must be rigid and not flex
when subjected to the high pressures generated by the speaker's
operation. For optimum performance, we recommend using 3/4" MDF
(Medium Density Fiberboard) and internal bracing.The enclosure should
be glued together and secured with nails or screws.

CALCULATING VOLUME

Calculating volume is merely a matter of measuring the dimensions in
inches and using the formula: H x W x D divided by 1728 (cubic feet).
See block below.

Advantages of sealed enclosures:

 Small enclosures
 Linear (Flat) response
 No port noise
 High power handling at all frequencies
 Excellent for sound quality
 Extended low frequency output when compared to vented enclosures

VENTED ENCLOSURES

Vented enclosures vary only from the sealed enclosure in that a vent or
port is added to “tune” the enclosure.The enclosures recommended are
designed for great overall performance. Larger boxes tend to be easy to
tune to lower frequencies while medium and small boxes are easier
to tune to higher frequencies.The vented design is less linear in
response than the sealed box but with noticeably more output at
the tuning frequency.

Advantages of vented enclosures:

 Higher average output than sealed

130.0

120.0

110.0

100.0

 Tuning frequency can be easily adjusted by changing port length
 Deep bass response with lower power requirements
 Great for high output with limited power

The graph shown here is a sample of how the F3 drop-off
point differs between sealed and vented enclosures.

Box Volume Height"x Width"x Depth

"

Divided by (cubic feet) 1728

If two facing sides are of uneven length,add them together and divide by
two to take the average. Using this number will give you the volume
without the necessity of calculating the box in sections and adding the
sections together.The thickness of the baffle material reduces the internal
volume so this must be subtracted from the outside dimensions to
determine the internal volume.The speaker itself also reduces the
internal volume.The amount of air displaced by each model is listed on
the specification sheet and should also be subtracted from the gross
volume calculation.

VENTED VS SEALED

90.0

80.0

70.0

60.0

10.0 20.0 40.0 60.0 80.0 100.0 200.0 1000.0

Sealed Box Vented Box

Frequency, Hz

2

SEALED ENCLOSURES

NOTE: Vb is the gross volume, which is the TOTAL internal volume, before any speaker and/or port displacement.

All external dimensions were based on the use of 3/4" (1.90cm) materials.

NOTE: When using enclosures other than recommended, call Technical Support for correct application.

Sealed Enclosure Recommendation

W

D

VENTED ENCLOSURES

SEALED ENCLOSURES

Vb- Internal Area cu. ft.

)retiL(

F3- -3dB Point (Hz)

Qtc- Enclosure Damping

H - Height-inch

)mc(

W - Width-inch

)mc(

H

D - Depth-inch

)mc(

8"

P3SD2-8 / P3SD4-8

0.25

(7.10)

49.3

1.29

10

(25.4)

16.5

(41.91)

5.0

(12.70)

P3SD2-10 / P3SD4-10

10"

0.50

(14.16)

46.9

0.90

13.5

(34.29)

20.0

(50.80)

5.50

(13.97)

P3SD2-12 / P3SD4-12

12"

1.00

(28.32)

40.0

1.01

16.0

(40.64)

20.0

(50.80)

8.0

(20.32)

Recommended Sealed Enclosure Volume Range

SEALED ENCLOSURES

Vb- Volume Range cu. ft.

(Liter)

8"

P3SD2-8 / P3SD4-8

0.20 to 0.70

(5.66 to 19.82)

Specifications subject to change without notice

P3SD2-10 / P3SD4-10

10"

0.40 to 1.00

(11.33 to 28.32)

P3SD2-12 / P3SD4-12

12"

0.60 to 1.20

(16.99 to 33.98)

NOTE: Vb is the gross volume, which is the TOTAL internal volume, before any speaker and/or port displacement.

All external dimensions were based on the use of 3/4" (1.90cm) materials.

NOTE: When using enclosures other than recommended, call Technical Support for correct application.

Vented (Ported) Enclosure Sizes

W

H

P

D

VENTED ENCLOSURES

Vb- Internal Area cu. ft.

(Liter)

Fb- Tuning Frequency (Hz)

F3- -3dB Point (Hz)

H - Height-inch

(cm)

W - Width-inch

(cm)

D - Depth-inch

(cm)

P - Port Diameter and

Length-inch
(cm)

Number of ports noted in ( )

NOTE: The port shown can be placed on any face of the enclosure as long as the port ends are not obstructed.

8"

P3SD2-8 / P3SD4-8

0.75

(21.24)

47.5

37.0

14.0

(35.56)

24.0

(60.96)

6.0

(15.24)

(1) 3 x 9

(1) (7.62 x 22.86)

Specifications subject to change without notice

P3SD2-10 / P3SD4-10

10"

1.00

(28.32)

47.5

36.0

15.5

(39.37)

24.0

(60.96)

7.0

(17.78)

(1) 4 x 12

(1) (10.16 x 30.48)

P3SD2-12 / P3SD4-12

12"

1.25

(35.40)

42.5

34.0

16.0

(40.64)

24.0

(60.96)

8.0

(20.32)

(1) 4 x 12

(1) (10.16 x 30.48)

NOTE: When using vented enclosures,for maximum reliability and power handling ensure that a subsonic or "infrasonic" filter is used so that

only usable low frequency signal is sent to the subwoofer.

3