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CONTENTS
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Congratulations
Ported Enclosure
PC PRO15 Specifications
Introduction
Bandpass Enclosure
Bandpass Enclosure
PC PRO15 Dimensions
PC PRO15 Response Graphs
Additional Information
Warranty
Speaker Cutaway
Sealed Enclosure
Sealed Enclosure
Ported Enclosure
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POWERCLASS PRO15 Subwoofer
PRO15 Specifications
Normal Power Handling
Voice Coil Diameter
Voice Coil Type / Former
Resonant Frequency
Qts-Total Damping
600W rms
5”
Edge wound/Aluminum
31Hz
0.34
Qms- Mechanical Damping
Qes- Electromagnetic Damping
Vas- Equivalent Compliance Volume
DC Resistance of V.C.
Sensitivity (SPL at 1W)
Linear Excursion
Peak to Peak Excursion
Mms- Total Mass
Sd- Piston Area
1.21
0.47
108.43 Liter
4Ω / 8Ω
90.51 dB
±6.25mm
31.5mm
207.04grams
0.0790 sqM
18.73 TM
Carbon fiber/Nomex honeycomb
Cast Aluminum
41 lb
Bl- Magnet Product
Diaphragm Material
Basket Material
Net Weight
Dimensions
Mounting Hole Diameter
Mounting Depth
15.143” dia. X 5.63” H
13.75” dia.
5.00"
Displacement
.21 cubic feet
PRO15 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
1) 6"Dia x 12.75"L Port
F3: 38Hz
F3: 38Hz
F3: 40Hz
F3: 42Hz
F3: 44Hz
General Use 1: 2.0 cu.ft. Ported
1) 6"Dia x 12.75"L Port
General Use 2: 1.75 cu.ft. Ported
1) 4"Dia x 6.125"L Port
Audiophile 1:
Audiophile 2:
1.5 cu.ft. Ported
1) 4"Dia x 7.75"L Port
1.5 cu.ft. Sealed
See page 10 for examples of dimensions for these enclosures.
1
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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 PrecisionPower Engineering Team.
The PrecisionPower, PowerClass 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 PrecisionPower
products, they reflect our commitment to “Absolutely State of the Art”
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, PrecisionPower
recommends that your subwoofer be installed by an Authorized
PrecisionPower Dealer.
2
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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
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.
2. Using the supplied template, trace the appropriate circle and
mounting hole pattern for your PrecisionPower subwoofer on
the baffle board. (See diagram)
3. Cut the speaker hole from the baffle board 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 in the
baffle to check the fit. Make sure that the T-nut holes line-up.
5. Install the 10-32 T-nuts (supplied) into the 7/32” holes
from the backside of the baffle board.
6. Run an appropriate length of wire into the enclosure, 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 wood shavings and dust from the inside of the
enclosure. (Failure to do so may void your warranty.) Loosely
fill the box half way with polyester fiberfill.
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 enclosure using the 10-32 bolts
(supplied).
11. Once the enclosure is complete, 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 the incredible enhancement your
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
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.
2.
3.
4.
Using the supplied template, trace the appropriate circle and mounting
hole pattern for your PrecisionPower subwoofer on the baffle board. Be
sure to offset the woofer to one side to leave room for the port in the
baffle. (See Diagram)
Cut the speaker hole out of the baffle board 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 mounting holes for T-nuts
with a 7/32” drill bit.
Locate the port material which you are going to use. Trace the pattern
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.
5.
6.
7.
Place the woofer into the hole which you have cut in the baffle to check
the fit. Make sure that the T-nut holes line up.
Install the 10-32 T-nuts (supplied) into the 7/32” holes from the
backside of the mounting board.
Run an appropriate length of wire into the box, leaving enough 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.
8.
Vacuum out any wood shavings and dust from the inside of the
enclosure. (Failure to do so may void your warranty.) Line the enclosure
with a polyester fiberfill blanket or fiberglass insulation about 1” thick.
9.
Apply the included foam gasket to the speaker to ensure a sealed fit.
Be sure that the mounting holes line up on the gasket.
10.
Connect the wires to the woofer observing the proper polarity,
positive and negative terminals. Strip away the insulation of
the wire about a 1/4" and install the wires into the terminal posts.
11.
12.
Install the woofer into the box using the 10-32 bolts (supplied).
Once the box is complete, it's 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.)
13.
Finally, sit back and enjoy the incredible enhancement your new
PrecisionPower subwoofer brings to your audio system.
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:
2
(Outside) Radius 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
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.
2.
3.
Using the supplied template, trace the appropriate circle and mounting
hole pattern for your PrecisionPower subwoofer on the baffle board.
Cut the speaker hole out of the baffle 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 mounting holes for T-nuts with a
7/32” drill bit.
4.
Locate the port material which you are going to use. Trace the pattern
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.
5.
6.
7.
Place the woofer into the hole which you have cut in the baffle to check
the fit. Make sure that the T-nut holes line up.
Install the 10-32 T-nuts (supplied) into the 7/32” holes from the
backside of the baffle board.
Run an appropriate length of wire into the enclosure, leaving enough 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.
8.
Vacuum out any wood shavings and dust from the inside of the
enclosure. (Failure to do so may void your warranty.) Then, line the
enclosure with a polyester fiberfill blanket or fiberglass insulation about
1” thick.
9.
Apply the included foam gasket to the speaker to ensure a sealed fit.
Be sure that the mounting holes line up on the gasket.
10.
Connect the wires to the woofer observing the proper polarity,
positive and negative terminals. Strip away the insulation of
the wire about a 1/4" and install the wires into the terminal posts.
11.
12.
Install the woofer into the enclosure using the 10-32 bolts (supplied).
Once the box is complete, it's 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.)
13.
Finally, sit back and enjoy the incredible enhancement your new
PrecisionPower subwoofer brings to your audio system.
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:
2
(Outside) Radius 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 PRO15
Outer Diameter
15.143”
13.75”
5.00”
Mounting Hole Diameter
Mounting Depth (from bottom of top ring)
Speaker Displacement
.21 cubic feet
PRO15 Sealed Enclosures
Net Volume
1.5 cubic feet
Internal Dimensions (see page 5)
18”L x 15”W x 10.75”D
2.50 cubic feet
3.5 cubic feet
23”L x 17”W x 11.75”D
24”L x 20”W x 14.00”D
PRO15 Ported Enclosures
Net Volume
1.50 cubic feet
Port Tuned to 35Hz
Internal Dimensions (see page 7)
19”L x 16”W x 10”D
6"Dia x 11.75" Long Port
1.75 cubic feet
Port Tuned to 45Hz
20”L x 16”W x 10.75”D
4"Dia x 6.125" Long Port
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
31Hz to 148Hz .5 cu.ft. Ported
Port Tuned to 35Hz
1.5 cu.ft. Sealed
15.5"L x 15.5"W x 12.25"C1
15.5"L x 15.5"W x 4.5"C2
2) 3"Dia x 10.25" Long Ports
Medium Gain
38Hz to 115Hz 1.0 cu.ft. Ported
Port Tuned to 35Hz
1.5 cu.ft. Sealed
16.5"L x 16"W x 11"C1
16.5"L x 16"W x 7.5"C2
2) 4"Dia x 8.5" Long Ports
High Gain
55Hz to 109Hz 2.0 cu.ft. Ported
Port Tuned to 35Hz
1.0 cu.ft. Sealed
18"L x 16"W x 7.25"C1
18"L x 16"W x 12"C2
1) 6"Dia x 1.75" Long Port
10
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POWERCLASS PRO15 Subwoofer
PRO15 Sealed RESPONSE CURVE*
PRO15 Ported RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PRO15 Bandpass RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
11
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Additional information
The PowerClass PRO15 subwoofer will give you excellent results in
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 dealer or
PrecisionPower Technical Service Department at
1-800-62-POWER.
Thanks again for choosing PrecisionPower.
The Solution Is Loud And Clear™
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: PrecisionPower defines abuse as, but not limited
to, burnt voice coils (blackened, no continuity, melted adhesives, coil separated from
the former, etc.), punctured or damaged surrounds, broken speaker terminals, non-
PrecisionPower modifications, bent, chipped, or broken frames, ripped spiders, or
damaged back plates. Speakers submitted with any of the above will be considered out
of warranty.
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. PrecisionPower warrants its products to be free from defects in materials and
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: PrecisionPower will either repair or replace at no charge,
to the original purchaser, any unit which PrecisionPower’s examination discloses to be defective
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 immedi-
ately to PrecisionPower. This warranty is not transferable.
2. Non-Authorized Dealer Installed Products: PrecisionPower will either repair or replace at no
charge, to the original purchaser, any unit which PrecisionPower’s examination discloses to be
defective and under warranty, provided the defect occurs within ninety (90) days from the date of
purchase and the product is returned immediately to PrecisionPower. Warranty claims beyond
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 re-
turned for warranty work.
4. This warranty shall NOT apply to any PrecisionPower product found to have the original
factory serial number removed or defaced. All products received (by PrecisionPower) for in war-
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 PrecisionPower product used for a
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 owner’s manual. Nor shall this warranty apply to any part which has been
subject to misuse, neglect, or accident.
6. PrecisionPower does not authorize any other persons to assume any other liability in connec-
tion with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY
PRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MER-
CHANTABILITY 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 RESULTING 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. Your product will be serviced on an in-warranty basis within the warranty period for the correc-
tion of warranted defects. If improper operation of your PrecisionPower product should occur,
contact your Authorized Dealer for assistance with the return and factory repair of your
PrecisionPower product. If an Authorized Dealer is not available, return the unit including your
name, telephone number, return address, a copy of your sales receipt, and a description of the
problem to:
PrecisionPower,Inc.
Service Department
4829 S. 38th Street
Phoenix, AZ 85040-2964
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 PrecisionPower Customer Service at 1-
800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be
returned with an itemized statement, C.O.D.
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