Rockford Fosgate P1S815, P1S4/12 warranty Safety, Recommended Enclosures, Carton Contents

SAFETY

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.

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	130.0
response than the sealed box but with noticeably more output at
the tuning frequency.	120.0
Advantages of vented enclosures:	110.0
• Higher average output than sealed	100.0

•Tuning frequency can be easily adjusted by changing port length

• Deep bass response with lower power requirements	90.0
• Great for high output with limited power	80.0
	70.0
The graph shown here is a sample of how the F3 drop-off	60.0
point differs between sealed and vented enclosures.
	10.0

CARTON CONTENTS

•(1) Punch P1 Series Subwoofer

•(1) Painted PVC 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.

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.

20.0	40.0	60.0	80.0	100.0	200.0	1000.0
Sealed Box	Vented Box		Frequency, Hz

2