Precision Power PRO15 User Manual

CONTENTS

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TM

POWERCLASS

OWNER'S MANU AL

PC PRO15

Congratulations Ported Enclosure

PC PRO15 Specifications Bandpass Enclosure

Introduction Bandpass Enclosure

Speaker Cutaway PC PRO15 Dimensions

Sealed Enclosure PC PRO15 Response Graphs

Sealed Enclosure Additional Information

Ported Enclosure Warranty

Congratulations and thank you.....

for choosing
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
sound quality, reliability, and value. This
our commitment to offer you unparalleled versatility and quality for years of
dependable service and listening enjoyment.

PrecisionPower

audio epuipment. At

PrecisionPower

PrecisionPower

TM

performance,

product reflects

we

S er vice

Do not attempt to service
Performing exploratory surgery on your audio equipment yourself
will void the warranty. Many parts of your
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
sound as good as the day it was purchased. Contact your
authorized
service through

PrecisionPower

PrecisionPower

PrecisionPower

PrecisionPower

dealer about obtaining any warranty

.(See Warranty inside back cover)

products yourself.

PrecisionPower

product will always

gear

FOR YOUR RECORDS:

Model
Serial Number
Purchase Date

C aution!

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

"Concert Level"

PrecisionPower

volumes with

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POWERCLASS PRO15

Subwoofer

PRO15

PRO15

Specifications

Normal Power Handling 600W rms
Voice Coil Diameter 5”
Voice Coil Type / Former Edge wound/Aluminum
Resonant Frequency 31Hz
Qts-Total Damping 0.34
Qms- Mechanical Damping 1.21
Qes- Electromagnetic Damping 0.47
Vas- Equivalent Compliance Volume 108.43 Liter
DC Resistance of V.C. 4Ω / 8Ω
Sensitivity (SPL at 1W) 90.51 dB
Linear Excursion ±6.25mm
Peak to Peak Excursion 31.5mm
Mms- Total Mass 207.04grams
Sd- Piston Area 0.0790 sqM
Bl- Magnet Product 18.73 TM
Diaphragm Material Carbon fiber/Nomex honeycomb
Basket Material Cast Aluminum
Net Weight 41 lb
Dimensions 15.143” dia. X 5.63” H
Mounting Hole Diameter 13.75” dia.
Mounting Depth 5.00"
Displacement .21 cubic feet

Enclosure Recommendations

SPL 1: 3.0 cu.ft. Bandpass F3: 55Hz

1.0 Sealed/2.0 Ported, 2) 4"Dia x 2.5"L Ports

SPL 2: 2.0 cu.ft. Ported F3: 38Hz

1) 6"Dia x 12.75"L Port

General Use 1: 2.0 cu.ft. Ported F3: 38Hz

1) 6"Dia x 12.75"L Port

General Use 2: 1.75 cu.ft. Ported F3: 40Hz

1) 4"Dia x 6.125"L Port

Audiophile 1: 1.5 cu.ft. Ported F3: 42Hz

1) 4"Dia x 7.75"L Port

Audiophile 2: 1.5 cu.ft. Sealed F3: 44Hz

See page 10 for examples of dimensions for these enclosures.

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INTRODUCTION

Your new

PowerClass PRO15

Flat Piston subwoofer is part of an
exciting line of loudspeakers which represent the extraordinary design
achievements of the
The

PrecisionPower, PowerClass PRO

PrecisionPower

Engineering Team.

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
products, they reflect our commitment to

“Absolutely State of the Art”

PrecisionPo wer

performance and flawless sonic quality.
The

PRO15

subwoofers incorporate a 5” voice coil, edge wound onto
a Black Anodized Aluminum former, 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 vented pole piece, spiders, and
magnet cavity. The use of an inverted coil geometry results in a
substantial reduction of distortion over conventional loudspeaker
topology. 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 consists of a Nomex Honeycomb
substrate between two Carbon Fiber skins. 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 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,
recommends that your subwoofer be installed by an

PrecisionPower Dealer

.

2

PrecisionPower

Authorized

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SPEAKER CUTAWAY

3

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SEALED ENCLOSURE

Building A Sealed Enclosure:

1. Build a sealed enclosure with internal L x W x D as specified for

2. Using the supplied template, trace the appropriate circle and

3. Cut the speaker hole from the baffle board with a router.

4. Place the woofer in the opening which you have cut in the

5. Install the 10-32 T-nuts (supplied) into the 7/32” holes

6. Run an appropriate length of wire into the enclosure, leaving

7. Vacuum out any wood shavings and dust from the inside of the

your woofer (See page 10). Use 1” thick MDF (medium density
fiber board) for the baffle that the Subwoofer mounts in, and 3/4”
thick MDF for the rest of the enclosure. Be sure to use wood glue
and silicone to ensure your enclosure is sealed properly, as air
leaks will affect the performance of your subwoofer.

mounting hole pattern for your
the baffle board. (See diagram)

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.

baffle to check the fit. Make sure that the T-nut holes line-up.

from the backside of the baffle board.

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.

enclosure. (Failure to do so may void your warranty.) Loosely
fill the box half way with polyester fiberfill.

PrecisionPower

subwoofer on

8. Apply the included foam gasket to the speaker to ensure a

9. Connect the wires to the woofer observing the proper polarity,

10. Install the woofer into the enclosure using the 10-32 bolts

11. Once the enclosure is complete, it is time to connect the speaker

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

sealed fit. Be sure that the mounting holes line up on the
foam gasket.

positive and negative terminals. Strip away the insulation of
the wire about 1/4" and install the wires into the terminal posts.

(supplied).

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.)

new

PrecisionPower

subwoofer brings to your audio system.

4

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SEALED ENCLOSURE

Sealed speaker diagram

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

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

5

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PORTED ENCLOSURE

Building A Ported Enclosure:

1. Build a ported enclosure with internal dimensions of LxWxD as specified

2. Using the supplied template, trace the appropriate circle and mounting

3. Cut the speaker hole out of the baffle board with a router. Use a guide

4. Locate the port material which you are going to use. Trace the pattern

5. Place the woofer into the hole which you have cut in the baffle to check

6. Install the 10-32 T-nuts (supplied) into the 7/32” holes from the

7. Run an appropriate length of wire into the box, leaving enough to

8. Vacuum out any wood shavings and dust from the inside of the

9. Apply the included foam gasket to the speaker to ensure a sealed fit.

10. Connect the wires to the woofer observing the proper polarity,

11. Install the woofer into the box using the 10-32 bolts (supplied).

12. Once the box is complete, it's time to connect the speaker wire coming

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

for your woofer (See page 10). Use 1” thick MDF (medium density fiber
board) for the baffle that the Subwoofer mounts in, and 3/4” thick MDF
for the rest of the enclosure. Be sure to use wood glue and silicone to
ensure your enclosure is sealed properly, as air leaks will affect the
performance of your subwoofer.

hole pattern for your
sure to offset the woofer to one side to leave room for the port in the
baffle. (See Diagram)

or template whenever possible for a clean, accurate job; use a jig saw
only if a router is not available. Drill out the mounting holes for T-nuts
with a 7/32” drill bit.

of the appropriate hole needed for the port, then cut the hole out. When
installing the port, make sure you have a distance of at least one port
diameter from the end of the port to the wall inside the box. Also, round
over the inside edge of both ends of the port to cut down on port noise.

the fit. Make sure that the T-nut holes line up.

backside of the mounting board.

comfortably install the wires to the terminals on the woofer before
placing the speaker into its mounting hole. Use a terminal cup whenever
possible.

enclosure. (Failure to do so may void your warranty.) Line the enclosure
with a polyester fiberfill blanket or fiberglass insulation about 1” thick.

Be sure that the mounting holes line up on the gasket.

positive and negative terminals. Strip away the insulation of
the wire about a 1/4" and install the wires into the terminal posts.

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.)

PrecisionPower

PrecisionPower

subwoofer brings to your audio system.

subwoofer on the baffle board. Be

6

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PORTED ENCLOSURE

Ported speaker diagram

Internal dimensions should be calculated to determine the correct enclosure
volume. Be sure to allow for speaker displacement, extra bracing (if used),
and port displacement (only the length of the port that is INSIDE the
enclosure). It may be necessary to angle the port to fit your design. To
calculate the displacement of the port:
(Outside) Radius2 x 3.14 x Length of the port that is inside the enclosure.

7

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BANDPASS ENCLOSURE

Building A Bandpass Enclosure:

1. Build a divided enclosure with internal dimensions of LxWxC1 and C2

2. Using the supplied template, trace the appropriate circle and mounting

3. Cut the speaker hole out of the baffle with a router. Use a guide or

4. Locate the port material which you are going to use. Trace the pattern

5. Place the woofer into the hole which you have cut in the baffle to check

6. Install the 10-32 T-nuts (supplied) into the 7/32” holes from the

7. Run an appropriate length of wire into the enclosure, leaving enough to

8. Vacuum out any wood shavings and dust from the inside of the

9. Apply the included foam gasket to the speaker to ensure a sealed fit.

10. Connect the wires to the woofer observing the proper polarity,

11. Install the woofer into the enclosure using the 10-32 bolts (supplied).

12. Once the box is complete, it's time to connect the speaker wire coming

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

as specified for your woofer (See page 10). Use 1” thick MDF (medium
density fiber board) for the baffle that the Subwoofer mounts in, and 3/4”
thick MDF for the rest of the enclosure. Be sure to use wood glue and
silicone to ensure your enclosure is sealed properly, as air leaks will
affect the performance of your subwoofer.

hole pattern for your

template whenever possible for a clean, accurate job; use a jig saw only
if a router is not available. Drill out the mounting holes for T-nuts with a
7/32” drill bit.

of the appropriate hole needed for the port, then cut the hole out. When
installing the port, make sure you have a distance of at least one port
diameter from the end of the port to the inside wall of the enclosure.
Also, round over the inside edge of both ends of the port to cut down
on port noise.

the fit. Make sure that the T-nut holes line up.

backside of the baffle board.

comfortably install the wires to the terminals on the woofer before
placing the speaker into its mounting hole. Use a terminal cup whenever
possible.

enclosure. (Failure to do so may void your warranty.) Then, line the
enclosure with a polyester fiberfill blanket or fiberglass insulation about
1” thick.

Be sure that the mounting holes line up on the gasket.

positive and negative terminals. Strip away the insulation of
the wire about a 1/4" and install the wires into the terminal posts.

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.)

PrecisionPower

PrecisionPower

subwoofer brings to your audio system.

subwoofer on the baffle board.

8

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BANDPASS ENCLOSURE

Bandpass speaker diagram

Internal dimensions should be calculated to determine the correct enclosure
volume. Be sure to allow for speaker displacement, extra bracing (if used),
and port displacement (only the length of the port that is INSIDE the
enclosure). It may be necessary to angle the port to fit your design. To
calculate the displacement of the port:
(Outside) Radius2 x 3.14 x Length of the port that is inside the enclosure.

9

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POWERCLASS PRO15

Subwoofer

Basic Working Dimensions for the

Outer Diameter 15.143”
Mounting Hole Diameter 13.75”
Mounting Depth (from bottom of top ring) 5.00”
Speaker Displacement .21 cubic feet

PRO15

PRO15

Sealed Enclosures

Net Volume Internal Dimensions (see page 5)

1.5 cubic feet 18”L x 15”W x 10.75”D

2.50 cubic feet 23”L x 17”W x 11.75”D

3.5 cubic feet 24”L x 20”W x 14.00”D

Ported Enclosures

Net Volume Internal Dimensions (see page 7)

1.50 cubic feet 19”L x 16”W x 10”D
Port Tuned to 35Hz 6"Dia x 11.75" Long Port

1.75 cubic feet 20”L x 16”W x 10.75”D
Port Tuned to 45Hz 4"Dia x 6.125" Long Port

PRO15

2.00 cubic feet 20”L x 16”W x 12”D
Port Tuned to 45Hz 6"Dia x 12.75" Long Port

PRO15

Bandpass Enclosures

Net Volume Internal Dimensions (see page 9)
Low Gain 1.5 cu.ft. Sealed 15.5"L x 15.5"W x 12.25"C1
31Hz to 148Hz .5 cu.ft. Ported 15.5"L x 15.5"W x 4.5"C2

Port Tuned to 35Hz 2) 3"Dia x 10.25" Long Ports
Medium Gain 1.5 cu.ft. Sealed 16.5"L x 16"W x 11"C1

38Hz to 115Hz 1.0 cu.ft. Ported 16.5"L x 16"W x 7.5"C2

Port Tuned to 35Hz 2) 4"Dia x 8.5" Long Ports
High Gain 1.0 cu.ft. Sealed 18"L x 16"W x 7.25"C1

55Hz to 109Hz 2.0 cu.ft. Ported 18"L x 16"W x 12"C2

Port Tuned to 35Hz 1) 6"Dia x 1.75" Long Port

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POWERCLASS PRO15

Subwoofer

PRO15

PRO15

Sealed RESPONSE CURVE

Ported RESPONSE CURVE

*

*

PRO15

*ACTUAL IN-CAR RESPONSE CURVE WILL V AR Y BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.

Bandpass RESPONSE CURVE

*ACTUAL IN-CAR RESPONSE CURVE WILL V AR Y BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.

11

*

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Additional information

The

PowerClass PRO15

enclosures from 1.5 cubic feet to over 3.5 cubic feet, ported or sealed.
Our dealers are trained to achieve the highest level of performance from

our products. If you are installing your new subwoofers on your own and
need assistance, please call your local

PrecisionPower

Technical Service Department at

subwoofer will give you excellent results in

PrecisionPower

dealer or

1-800-62-POWER

Thanks again for choosing

Ferrosound means more stable sound quality and performance, smoother frequency response,

reduced distortion, increased power handling, greater efficiency and voice coil centering.

NOTE: Abuse and/or Installation Error:
to, burnt voice coils (blackened, no continuity, melted adhesives, coil separated from
the former, etc.), punctured or damaged surrounds, broken speaker terminals, non-

PrecisionPower

damaged back plates. Speakers submitted with any of the above will be considered out
of warranty.

modifications, bent, chipped, or broken frames, ripped spiders, or

The Solution Is Loud And Clear™

PrecisionPower

.

PrecisionPower

defines abuse as, but not limited

.

12

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WARRANTY

Three-Year Limited U.S.A. Warranty

This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
workmanship under normal use and service for a period of three (3) years from the date of
original purchase when the unit is installed by an Authorized Dealer. Non-Authorized Dealer
installed products carry a one (1) year parts and ninety (90) days labor limited warranty. The
extent and conditions of Limited Warranty are as follows:

1. Authorized Dealer Installed Products:
to the original purchaser, any unit which
and under warranty, provided the defect occurs within three (3) years from the date of original
purchase when the unit is installed by an Authorized Dealer and the product is returned immedi­ately to

2. Non-Authorized Dealer Installed Products:
charge, to the original purchaser, any unit which
defective and under warranty, provided the defect occurs within ninety (90) days from the date of
purchase and the product is returned immediately to
ninety (90) days for Non-Authorized Dealer Installed Products will be for parts only and will
extend for one (1) year from the date of purchase. This warranty is not transferable.

3. The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower product
must be established by an original sales receipt which must accompany the article being re­turned for warranty work.

4. This warranty shall NOT apply to any
factory serial number removed or defaced. All products received (by
ranty or out of warranty repair, with their original serial numbers removed or defaced, will NOT be
repaired and will be returned to sender, freight collect. Refer to original packaging for the serial
number of your component speakers.

5. The provisions of this warranty shall not apply to any
purpose for which it is not designed, which has been repaired or altered in any way, or which has
been connected, installed, or adjusted other than in accordance with the instructions furnished in

PrecisionPower’ s

subject to misuse, neglect, or accident.

6. PrecisionPower does not authorize any other persons to assume any other liability in connec­tion with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY
PRECISIONPOWER APPLICABLE T O ITS PRODUCTS. ANY IMPLIED WARRANTY OR MER­CHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO
PRECISIONPOWER PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THIS
LIMITED WARRANTY. PRECISIONPOWER SHALL NOT BE LIABLE FOR THE INCIDENTAL,
CONSEQUENTIAL, OR COMMERCIAL DAMAGES RESUL TING FROM THE BREACH OF THIS
WRITTEN WARRANTY. Some states or provinces do not allow the exclusion or limitation of
incidental or consequential damages or limitations on how long an implied warranty lasts; so the
above limitations or exclusions may not apply to you.

7. Y our product will be serviced on an in-warranty basis within the warranty period for the correc­tion of warranted defects. If improper operation of your
contact your Authorized Dealer for assistance with the return and factory repair of your

PrecisionPower

name, telephone number, return address, a copy of your sales receipt, and a description of the
problem to:

TO RETURN PRECISIONPOWER PRODUCTS OUT OF WARRANTY: Return the unit, postage
prepaid, in the original protective carton. Please include a description of the problem and, if
desired, a request for an estimate of repair costs. Unless a request for an estimate is included,
the unit will be repaired as necessary. Please contact
800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be
returned with an itemized statement, C.O.D.

PrecisionPower

PrecisionPower

owner’s manual. Nor shall this warranty apply to any part which has been

product. If an Authorized Dealer is not available, return the unit including your

warrants its products to be free from defects in materials and

PrecisionPower
PrecisionPower’ s

. This warranty is not transferable.

PrecisionPower

PrecisionPower

PrecisionPower,Inc.
Service Department

4829 S. 38th Street

Phoenix, AZ 85040-2964

will either repair or replace at no charge,

examination discloses to be defective

PrecisionPower’s

PrecisionPower

will either repair or replace at no

examination discloses to be

. Warranty claims beyond

product found to have the original

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PrecisionPower

PrecisionPower

PrecisionPower

product used for a

product should occur,

Customer Service at 1-

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) for in war-