Precision Power PC PRO10, PC PRO12, PC PRO8, POWERCLASS PRO8, POWERCLASS PRO10 Owner's Manual

PC PRO8 / PRO10 / PRO12

OWNER'S MANUAL

POWERCLASS

TM

CONTENTS

(Click on a topic to view)

Congratulations PC PRO8 Response Graphs

Introduction PC PRO10 Specifications

Sealed Enclosure PC PRO10 Response Graphs

Sealed Enclosure PC PRO12 Specifications

Ported Enclosure PC PRO12 Response Graphs

Ported Enclosure Additional Information

PC PRO8 Specifications Warranty

for choosing

PrecisionPower

audio epuipment. At

PrecisionPower

we
proudly design, engineer and manufacture audio products at our facility in
Phoenix, Arizona. Our award winning engineering team utilizes innovative
technology to consistently deliver Absolutely State of the Art

TM

performance,

sound quality, reliability, and value. This

PrecisionPower

product reflects
our commitment to offer you unparalleled versatility and quality for years of
dependable service and listening enjoyment.

Service

Do not attempt to service

PrecisionPower

products yourself.
Performing exploratory surgery on your audio equipment yourself
will void the warranty. Many parts of your

PrecisionPower

gear
are custom built to our specifications. Our factory parts are not
made available to anyone else nor are they for sale. Our goal
is to make sure that your

PrecisionPower

product will always
sound as good as the day it was purchased. Contact your
authorized

PrecisionPower

dealer about obtaining any warranty

service through

PrecisionPower

.(See Warranty inside back cover)

FOR YOUR RECORDS:

Model
Serial Number
Purchase Date

Caution!

The extended use of a high powered audio system may
result in hearing loss or damage. While

PrecisionPower

systems are capable of

"Concert Level"

volumes with
incredible accuracy, they are also designed for you to
enjoy at more reasonable levels all of the sonic subtleties
created by musicians. Please observe all local sound
ordinances.

Congratulations and thank you.....

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Y our new

Po werClass PRO

Flat Piston subwoofer is part of an exciting line

of loudspeakers,

PRO8, PRO10

and

PRO12

, which represent the

extraordinary design achievements of the

PrecisionPo wer

Engineering T eam.

The

PPI Po werClass PRO

Flat Piston subwoofers have been engineered
from the ground up and are constructed at our factory in Phoenix from the
finest materials available. Like all

PPI

products, they reflect our commitment

to

“Absolutely State of the Art”

performance and flawless sonic quality.

The

PRO8

subwoofer incorporates a 2” voice coil, while the

PRO10

and

PRO12

incorporate a 3” voice coil. Both the 2" and 3" voice coils are edge
wound onto Nomex reinforced Kapton formers, and are available in 4Ω and
8Ω versions. The voice coils are cooled and given increased mechanical
damping through the use of a ferrofluid filled magnetic gap. The cooling,
and therefore power handling, is further enhanced by virtue of the inverted
coil geometry , together with a vented pole piece, spiders, and magnet cavity .
The use of an inverted coil geometry results in a substantial reduction of
distortion over conventional loudspeaker systems. Increased linearity over
a large excursion is obtained by using dual matched rear suspension
components together with the finest quality rubber roll surround.
The most unique feature is the use of a flat diaphragm instead of a conical
structure. The diaphragm is constructed from a combination of state of the
art materials which include carbon fiber and Nomex honeycomb. The result
is a diaphragm that is exceptionally stiff and lightweight which does not
exhibit cone flex distortion or the buckling effects inherent in conventional
designs. Additionally,

PrecisionPower’s

exclusive cast basket design is
extremely rigid which ultimately removes any unwanted distortion due to
resonance and flexing.
Included in this manual are a number of sample enclosure drawings. They
are by no means the only enclosures to use, but rather a starting point in the
right direction. To determine the correct enclosure for your needs many
factors need to be addressed (amount of power, vehicle, placement,
crossover, etc.) Therefore, as always,

PrecisionPower

recommends that

your subwoofer be installed by an

Authorized PrecisionPower Dealer

.

INTRODUCTION

1. Rubber roll surround

2. Aluminum trim ring

3. Carbon fiber/Nomex

honeycomb diaphragm

4. Cast aluminum basket

5. Gold plated, heavy duty

terminal posts

6. Magnet structure

7. Forged steel back plate

8. Magnet cavity vent

9. edge wound voice coil/

Kapton former

10. Dual spiders

11. Vented pole piece

12. Ferrofluid filled magnetic gap

8

7

6

1

3

4

5

10

9

11

12

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SEALED ENCLOSURE

Building A Sealed Enclosure:

1. Build a sealed box with specified dimensions of L x W x D per
drawing. (See chart for suggested box sizes) Use 3/4” thick
material (preferably medium density fiber board or equivalent) for
box construction. Be sure to use wood glue and silicone to ensure
your enclosure is sealed properly, as air leaks will affect the
performance of a subwoofer . (The use of an air stapler will help
to achieve the nicest results for constructing the enclosure.)

2. Using the supplied template, trace the circle template and
mounting hole pattern for your

PrecisionPower

subwoofer on

the appropriate side of the box. (See diagram)

3. Cut the speaker hole from the face of the box with a router.
Use a guide or template whenever possible for a clean,
accurate job; use a jig saw only if a router is not available.
Drill out the holes for the T-nuts with a 7/32” drill bit.

4. Place the woofer in the opening which you have cut into the
box to check the fit. Make sure that the T-nut holes line-up.

5. Install the 10-24 T-nuts (supplied) into the 7/32” holes
from the backside of the face board.

6. Run an appropriate length of wire into the box, leaving enough
length to comfortably install the wires to the terminals on the
woofer before placing the speaker into its mounting hole. Use
a terminal cup whenever possible.

7. Vacuum out any shavings and dust that could find it's way into
your woofer from the inside of the box. Fill the box with polyester
fiberfill. Use a ratio of 1/2lb per cubic foot.

8. Apply the included foam gasket to the speaker to ensure a
sealed fit. Be sure that the mounting holes line up on the
foam gasket.

9. Connect the wires to the woofer observing the proper polarity,
positive and negative terminals. Strip away the insulation of
the wire about 1/4" and install the wires into the terminal posts.

10. Install the woofer into the box using the provided 10-24 bolts.

11. Once the box is completed it is time to connect the speaker
wire coming from the subwoofer enclosure to your amplifier.
Check that you use the proper wire for consistent polarity,
positive and negative. (Refer to amplifier owner’s manual.)

12. Finally, sit back and enjoy to the incredible enhancement
your new

PrecisionPower

subwoofer brings to your audio system.

2

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SEALED ENCLOSURE

L

W

D

Mounting hole diameter

Foam seal gasket

Subwoofer

10-24 Allen head bolt

10-24 T-nut

Internal dimensions should be calculated to determine the correct box volume.

Be sure to allow for speaker displacement and extra bracing (if used).

Sealed speaker diagram

3

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