TM
POWERCLASS
C2 OWNERS MANUAL
CONTENTS
(click a topic to view)
CONGRATULATIONS
PC12 C2 RESPONSE CURVES
INTRODUCTION
PC15 C2 DIMENSIONS
PC8 C2 SPECIFICATIONS
PC10 C2 SPECIFICATIONS
PC12 C2 SPECIFICATIONS
PC15 C2 SPECIFICATIONS
PC8 C2 DIMENSIONS
PC15 C2 RESPONSE CURVES
SEALED ENCLOSURE
SEALED ENCLOSURE (continued)
PORTED ENCLOSURE
PORTED ENCLOSURE (continued)
BANDPASS ENCLOSURE
BANDPASS ENCLOSURE (continued)
ADDITIONAL INFORMATION
WARRANTY
PC8 C2 RESPONSE CURVES
PC10 C2 DIMENSIONS
PC10 C2 RESPONSE CURVES
PC12 C2 DIMENSIONS
INTRODUCTION
Your new PowerClass C2 subwoofer is part of an exciting line of
loudspeakers from PrecisionPower. The PowerClass
subwoofers reflect our commitment to “Absolutely State of the Art”
performance and flawless sonic quality.
C2 Structure
1. Progressive Butyl Rubber Surround
3. Butyl Rubber Flange Gasket
5. Deep Draw Steel Basket
7. Flat Spider
2. Stepped PolyCarbon Cone
4. Gold Plated 12ga. Binding Post Terminals
6. High Current Silver Plated Tinsel Leads
8. Spider Clamp
9. TIL Voice Coil Former
11. 10mm Frontplate
10. Long Wind 4 Layer Voice Coil
12. Integrated Backplate / Extended Pole
13. Protective Magnet Cover
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
PowerClass Dealer.
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POWERCLASS PC8 C2 Subwoofer
PC8 C2 Specifications
Normal Power Handling
Voice Coil Diameter
Voice Coil Type / Former
Resonant Frequency
Qts-Total Damping
150 W rms
2” / 50.8mm
4 Layer/TIL
32 Hz
0.49
Qms- Mechanical Damping
Qes- Electromagnetic Damping
Vas- Equivalent Compliance Volume
DC Resistance of V.C.
Sensitivity (SPL at 1W)
Xmax (Linear Excursion)
Peak to Peak Excursion
Mms- Total Mass
Sd- Piston Area
Bl- Magnet Product
Cone Material
Basket Material
Net Weight
9.20
0.518
.80cuft / 22.78 liter
3.6W / 6.8W
87.57 dB
±.343" / 8.72 mm
±.629" / 16.00 mm
2.34oz / 66.35 g
.230sqft / 0.0214 sqm
9.26 Tm
Carbon Poly
Stamped Steel
5.80 lbs / 2.63kg
8.09” dia. X 4.375” H
205mm dia. X 110mm H
7.375” /185mm
4.00" /102mm
.04 cuft / 1.13 liter
Dimensions
Mounting Hole Diameter
Mounting Depth
Displacement
PC8 C2 Enclosure Recommendations
SPL 1:
1.31cu.ft. Bandpass
.61 Sealed/.7 Ported, 3"Dia x 5.5"L Port
F3: 49Hz
Fo: 60Hz
Fo: 43Hz
Fo: 43Hz
Fo: 47Hz
SPL 2:
.75 cu.ft. Ported
3"Dia x 11"L Port
F3: 40Hz
F3: 40Hz
F3: 46Hz
F3: 48Hz
F3: 49Hz
General Use 1: .75 cu.ft. Ported
3"Dia x 11"L Port
General Use 2: .5 cu.ft. Ported
2"Dia x 6"L Port
Audiophile 1:
Audiophile 2:
.75 cu.ft. Sealed
1) 4"Dia x 7.75"L Port
.5 cu.ft. Sealed
See page 6 for examples of dimensions for these enclosures.
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POWERCLASS PC10 C2 Subwoofer
PC10 C2 Specifications
Normal Power Handling
Voice Coil Diameter
Voice Coil Type / Former
Resonant Frequency
Qts-Total Damping
300W rms
2” / 50.8mm
4 Layer/TIL
25.24Hz
0.38
Qms- Mechanical Damping
Qes- Electromagnetic Damping
Vas- Equivalent Compliance Volume
DC Resistance of V.C.
Sensitivity (SPL at 1W)
Xmax (Linear Excursion)
Peak to Peak Excursion
Mms- Total Mass
6.95
0.40
2.4 cuft / 68.14 liter
3.6W / 6.8W
89.64 dB
±.393" / 9.97mm
±.679" / 17.25mm
3.37oz / 95.73g
.372sqft / 0.0346 sqm
11.74 Tm
Sd- Piston Area
Bl- Magnet Product
Cone Material
Carbon Poly
Basket Material
Net Weight
Dimensions
Stamped Steel
8.68 lbs / 3.94 kg
10.07” dia. X 5.185” H
(256mm dia. X 132mm H)
9.25” / 232mm dia.
4.80" / 122mm
.065 cuft / 1.84 liter
Mounting Hole Diameter
Mounting Depth
Displacement
PC10 C2 Enclosure Recommendations
SPL 1:
1.0 cu.ft. Bandpass
.36 Sealed/.62 Ported, 4"Dia x 6.5"L Port
F3: 50Hz
Fo: 75Hz
Fo: 47Hz
Fo:42Hz
Fo: 47Hz
Fo:42Hz
SPL 2:
.75 cu.ft. Ported
3"Dia x 8.9"L Port
F3: 43Hz
F3: 38Hz
F3: 43Hz
F3: 38Hz
F3: 51Hz
General Use 1: 1.0 cu.ft. Ported
3"Dia x 8.25"L Port
General Use 2: .75 cu.ft. Ported
3"Dia x 8.9"L Port
Audiophile 1:
Audiophile 2:
1.0 cu.ft. Ported
3"Dia x 8.25"L Port
.75 cu.ft. Sealed
See page 8 for examples of dimensions for these enclosures.
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POWERCLASS PC12 C2 Subwoofer
PC12 C2 Specifications
Normal Power Handling
Voice Coil Diameter
Voice Coil Type / Former
Resonant Frequency
Qts-Total Damping
300W rms
2” / 50.8mm
4 Layer/TIL
21.64Hz
0.41
Qms- Mechanical Damping
Qes- Electromagnetic Damping
Vas- Equivalent Compliance Volume
DC Resistance of V.C.
Sensitivity (SPL at 1W)
Xmax (Linear Excursion)
Peak to Peak Excursion
Mms- Total Mass
Sd- Piston Area
Bl- Magnet Product
Cone Material
Basket Material
Net Weight
5.41
0.44
5.31cuft / 150.37 liter
3.6W / 6.8W
90.67 dB
±.393" / 9.97mm
±.67" / 17.00mm
4.46oz / 126.59g
.555sqft / 0.0511 sqm
11.87 Tm
Carbon Poly
Stamped Steel
8.92lbs / 4.04kg
12.0” dia. X 5.78” H
305mm dia. X 147mm H
11.00” / 280mm
5.5" / 140mm
.075 cuft / 2.12 liter
Dimensions
Mounting Hole Diameter
Mounting Depth
Displacement
PC12 C2 Enclosure Recommendations
SPL 1:
2.3 cu.ft. Bandpass
.6 Sealed/1.7 Ported, 2) 4"Dia x 4.5"L Ports
F3: 53Hz
Fo: 70Hz
Fo: 45Hz
Fo: 40Hz
Fo: 68Hz
SPL 2:
1.25 cu.ft. Ported
4"Dia x 10.0"L Port
F3: 42Hz
F3: 37Hz
F3: 45Hz
General Use 1: 1.75 cu.ft. Ported
4"Dia x 8.5"L Port
General Use 2: 1.9 cu.ft. Bandpass
.7 Sealed/1.2 Ported, 2) 4"Dia x 8.5"L Ports
Audiophile 1:
Audiophile 2:
1.25 cu.ft. Sealed
F3: 44Hz
F3: 31Hz
2.5 cu.ft. Ported
Fo: 35Hz
4"Dia x 7.5"L Port
See page 10 for examples of dimensions for these enclosures.
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POWERCLASS PC15 C2 Subwoofer
PC15 C2 Specifications
Normal Power Handling
Voice Coil Diameter
Voice Coil Type / Former
Resonant Frequency
Qts-Total Damping
300W rms
2” / 50.8mm
4 Layer/TIL
31Hz
0.34
Qms- Mechanical Damping
Qes- Electromagnetic Damping
Vas- Equivalent Compliance Volume
DC Resistance of V.C.
Sensitivity (SPL at 1W)
Xmax (Linear Excursion)
Peak to Peak Excursion
Mms- Total Mass
1.21
0.47
3.83cuft / 108.43 liter
3.6W / 6.8W
90.51 dB
±.383" / 9.72mm
±.679" / 17.25mm
5.87oz / 166.15g
.920sqft / 0.0855 sqm
12.91 Tm
Sd- Piston Area
Bl- Magnet Product
Cone Material
Carbon Poly
Basket Material
Net Weight
Dimensions
Stamped Steel
11.32 lbs / 5.13kg
15.16” dia. X 7.20” H
(385mm dia. X 183mm H)
13.75” / 347mm dia.
6.85" / 173mm
.09 cuft / 2.56liter
Mounting Hole Diameter
Mounting Depth
Displacement
PC15 C2 Enclosure Recommendations
SPL 1:
5.0 cu.ft. Bandpass
F3: 47Hz
Fo: 65
1.5 Sealed/3.5 Ported, 2) 6"Dia x 5.0"L Ports
SPL 2:
2.0 cu.ft. Ported
4"Dia x 9.0"L Port
F3: 44Hz
F3: 35Hz
F3: 40Hz
Fo: 37Hz
Fo: 35Hz
Fo: 65
General Use 1: 3.5 cu.ft. Ported
4"Dia x 4.5"L Port
General Use 2: 3.5 cu.ft. Bandpass
1.5 Sealed/2.0 Ported, 6"Dia x 4.0"L Ports
Audiophile 1:
Audiophile 2:
2.5 cu.ft. Sealed
2.0 cu.ft. Sealed
F3: 41Hz
F3: 44Hz
See page 10 for examples of dimensions for these enclosures.
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POWERCLASS PC8 C2 Subwoofer
Basic Working Dimensions for the PC8 C2
Outer Diameter
8.09” / 205mm
7.375” /185mm
4.00" /102mm
Mounting Hole Diameter
Mounting Depth (from bottom of top ring)
Speaker Displacement
.04 cuft / 1.13 liter
PC8 C2 Sealed Enclosures
Net Volume
.33 cubic feet
Internal Dimensions (see page 15)
14.25”L x 8.5”W x 5.25”D
.5 cubic feet
.6 cubic feet
16”L x 9.75”W x 6”D
16.75”L x 10.25”W x 6.5”D
PC8 C2 Ported Enclosures
Net Volume
.33 cubic feet
Internal Dimensions (see page 17)
14”L x 9”W x 5.375”D
Port Tuned to 50Hz
2"Dia x 8.5" Long Port
.5 cubic feet
Port Tuned to 47Hz
14”L x 9”W x 5.625”D
2"Dia x 6.0" Long Port
.75 cubic feet
Port Tuned to 42Hz
19”L x 11.75”W x 7.25”D
3"Dia x 11.0" Long Port
PC8 C2 Bandpass Enclosures
Net Volume
.6 cu.ft. Sealed
.35 cu.ft. Ported
Port Tuned to 55 Hz
Internal Dimensions (see page 19)
10"L x 11.5"W x 10.125"C1
10"L x 11.5"W x 5.375"C2
3"Dia x 15.0" Long Port*
Low Gain
33Hz to 81Hz
Medium Gain
43Hz to 94Hz
.35 cu.ft. Sealed
.34 cu.ft. Ported
Port Tuned to 65Hz
12"L x 8.5"W x 6.5"C1
12"L x 8.5"W x 6"C2
3"Dia x 10.75" Long Port*
High Gain
49Hz to 74Hz
.61 cu.ft. Sealed
.7 cu.ft. Ported
Port Tuned to 60Hz
17"L x 10.25"W x 6.5"C1
17"L x 10.25"W x 7.125"C2
3"Dia x 5.0" Long Port
* Port must run through the sealed chamber in this enclosure.
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POWERCLASS PC8 C2 Subwoofer
PC8 C2 Sealed RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC8 C2 Ported RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC8 C2 Bandpass RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
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POWERCLASS PC10 C2 Subwoofer
Basic Working Dimensions for the PC10 C2
Outer Diameter
10.07” / 256mm
9.25” / 232mm dia.
4.80" / 122mm
Mounting Hole Diameter
Mounting Depth (from bottom of top ring)
Speaker Displacement
.065 cuft / 1.84 liter
PC10 C2 Sealed Enclosures
Net Volume
.5 cubic feet
Internal Dimensions (see page 15)
16”L x 10”W x 6.125”D
.75 cubic feet
1.0 cubic feet
18”L x 11.25”W x 7.0”D
20”L x 12.5”W x 7.375”D
PC10 C2 Ported Enclosures
Net Volume
.75 cubic feet
Internal Dimensions (see page 17)
18.5”L x 11.5”W x 7.0”D
Port Tuned to 47Hz
3"Dia x 9.0" Long Port
1.0 cubic feet
20”L x 12”W x8”D
Port Tuned to 42Hz
3"Dia x 8.25" Long Port
1.25 cubic feet
Port Tuned to 38Hz
21.75”L x 13”W x 8.25”D
3"Dia x 8.0" Long Port
PC10 C2 Bandpass Enclosures
Net Volume
Internal Dimensions (see page 19)
18.75"L x 11.5"W x 7.25"C1
18.75"L x 11.5"W x 5.25"C2
3"Dia x 8.25" Long Port
Low Gain
33Hz to 85Hz
.84 cu.ft. Sealed
.63 cu.ft. Ported
Port Tuned to 53Hz
Medium Gain
39Hz to 94Hz
.60 cu.ft. Sealed
.60 cu.ft. Ported
Port Tuned to 60Hz
17.0"L x 10.5"W x 6.5"C1
17.0"L x 10.5"W x 6.375"C2
3"Dia x 6.25" Long Port
High Gain
50Hz to 101Hz .62 cu.ft. Ported
Port Tuned to 71Hz
.36 cu.ft. Sealed
12.0"L x 12.0"W x 5.125"C1
12.0"L x 12.0"W x 8.125"C2
4"Dia x 7.5" Long Port
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POWERCLASS PC10 C2 Subwoofer
PC10 C2 Sealed RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC10 C2 Ported RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC10 C2 Bandpass RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
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POWERCLASS PC12 C2 Subwoofer
Basic Working Dimensions for the PC12 C2
Outer Diameter
12.0” / 305mm
11.00” / 280mm
5.5" / 140mm
Mounting Hole Diameter
Mounting Depth (from bottom of top ring)
Speaker Displacement
.075 cuft / 2.12 liter
PC12 C2 Sealed Enclosures
Net Volume
1.0 cubic feet
Internal Dimensions (see page 15)
20”L x 12”W x 7.75”D
1.25 cubic feet
1.5 cubic feet
21.25”L x 13.25”W x 8.125”D
22.5”L x 14”W x 8.625”D
PC12 C2 Ported Enclosures
Net Volume
1.25 cubic feet
Port Tuned to 45Hz
Internal Dimensions (see page 17)
22.75”L x 14”W x 7.5”D
4"Dia x 10.0" Long Port
1.75 cubic feet
Port Tuned to 40Hz
24.75”L x 15”W x 8.75”D
4"Dia x 8.5" Long Port
2.50 cubic feet
Port Tuned to 35Hz
27.25”L x 17”W x 9.75”D
4"Dia x 7.5" Long Port
PC12 C2 Bandpass Enclosures
Net Volume
.94cu.ft. Sealed
Internal Dimensions (see page 19)
15"L x 15"W x 7.75"C1
Low Gain
32Hz to 103Hz .8 cu.ft. Ported
Port Tuned to 60Hz
15"L x 15"W x 6.625"C2
4"Dia x 8.375" Long Port
Medium Gain
45Hz to 98Hz
.7 cu.ft. Sealed
1.2 cu.ft. Ported
Port Tuned to 68Hz
15"L x 15"W x 6.0"C1
15"L x 15"W x 10.125"C2
2) 4"Dia x 8.5" Long Ports
High Gain
53Hz to 95 Hz
.6 cu.ft. Sealed
1.7 cu.ft. Ported
Port Tuned to 70Hz
15"L x 15"W x 5.125"C1
15"L x 15"W x 13.5"C2
2) 4"Dia x 4.5" Long Ports
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POWERCLASS PC12 C2 Subwoofer
PC12 C2 Sealed RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC12 C2 Ported RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC12 C2 Bandpass RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
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POWERCLASS PC15 C2 Subwoofer
Basic Working Dimensions for the PC15 C2
Outer Diameter
15.157” / 385mm
13.75” / 350mm
6.85" / 174mm
Mounting Hole Diameter
Mounting Depth (from bottom of top ring)
Speaker Displacement
.09 cuft / 2.67 liter
PC15 C2 Sealed Enclosures
Net Volume
1.5 cubic feet
Internal Dimensions (see page 15)
22.5”L x 14”W x 8.75”D
2.0 cubic feet
2.5 cubic feet
25”L x 15.25”W x 9.5”D
26”L x 16.5”W x 10.5”D
PC15 C2 Ported Enclosures
Net Volume
2.0 cubic feet
Internal Dimensions (see page 17)
25.75”L x 16”W x 9”D
Port Tuned to 37Hz
4"Dia x 9.0" Long Port
3.5 cubic feet
Port Tuned to 35Hz
30”L x 18.5”W x 11.25”D
4"Dia x 4.5" Long Port
5.0 cubic feet
Port Tuned to 30Hz
33”L x 21”W x 12.75”D
4"Dia x 4" Long Port
PC15 C2 Bandpass Enclosures
Net Volume
2.0 cu.ft. Sealed
31Hz to 108Hz 1.5 cu.ft. Ported
Port Tuned to 60Hz
Internal Dimensions (see page 19)
16.5"L x 16.5"W x 13.25"C1
16.5"L x 16.5"W x 10"C2
Low Gain
2) 3"Dia x 10.25" Long Ports
Medium Gain
40Hz to 108Hz 2.0 cu.ft. Ported
Port Tuned to 65Hz
1.5 cu.ft. Sealed
16.5"L x 16.5"W x 10"C1
16.5"L x 16.5"W x 13.5"C2
2) 4"Dia x 8.5" Long Ports
High Gain
47Hz to 92Hz
1.5 cu.ft. Sealed
3.5 cu.ft. Ported
Port Tuned to 6 5Hz
18"L x 16"W x 9.5"C1
18"L x 16"W x 21.125"C2
1) 6"Dia x 1.75" Long Port
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POWERCLASS PC15 C2 Subwoofer
PC15 C2 Sealed RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC15 C2 Ported RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
PC15 C2 Bandpass RESPONSE CURVE*
*ACTUAL IN-CAR RESPONSE CURVE WILL VARY BASED ON CAR TYPE, WOOFER LOADING, AND ENCLOSURE DESIGN.
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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 recommended enclosures for your woofer). Use
3/4” thick MDF for 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 PowerClass C2 subwoofer on the
baffle board. (See diagram)
3. Cut the speaker hole from the baffle board with a router,
using a guide or template whenever possible. Use a jig saw only
if a router is not available.
4. Place the woofer in the opening which you have cut in the
baffle to check the fit.
5. 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.
6. 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.
7. 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.
8. Install the woofer into the enclosure using #8 or larger wood
screws (not supplied)
9. 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 your amplifier owner’s manual.)
10. Finally, sit back and enjoy the incredible enhancement
your new PowerClass C2 subwoofer brings to your audio
system.
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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).
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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 recommended enclosures for
your woofer). Use 3/4” thick MDF for the enclosure. Be sure to
use wood glue and silicone at all joints to ensure your enclosure
is sealed properly. Air leaks will affect the performance of your
subwoofer, even in a ported enclosure.
2. Using the supplied template, trace the appropriate circle and
mounting hole pattern for your PowerClass C2 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)
3. Cut the speaker and port holes from the baffle board with a
router, using a guide or template whenever possible. Use a jig
saw only if a router is not available.
4. Locate the port material that you are going to use, and cut to
length. When installing the port, make sure you have a
clearance of at least one port diameter from the end of the port
to the inside wall of the box. Round over the inside edges of
both ends of the port with a router or file to minimize port noise.
5. Place the woofer into the hole which you have cut in the baffle to
check the fit.
6. Run an appropriate length of wire into the box, leaving enough
to comfortably install the wires to the woofer terminals 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.) Line the
enclosure with a polyester fiberfill blanket or fiberglass insulation
about 1” thick.
8. 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
9. 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 your amplifier owner’s manual.)
10. Finally, sit back and enjoy the incredible enhancement your new
PowerClass C2 subwoofer brings to your audio system.
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PORTED ENCLOSURE
Ported Enclosure 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
2
calculate the displacement of the port: (Outside) Radius x 3.14 x Length of
the port that is inside the enclosure.
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BANDPASS ENCLOSURE
Building a Bandpass Enclosure:
1. Using 3/4" thick MDF, cut out all the panels to build a divided
enclosure with internal dimensions of LxWxC1 and C2 as specified for
your woofer (See recommended enclosures for your woofer).
2.
Using the supplied template, trace the appropriate circle and
mounting hole pattern for your PowerClass C2 subwoofer on the baffle
board.
3.
4.
Cut the speaker and port holes from the baffle board with a router,
using a guide or template whenever possible. Use a jig saw only if a
router is not available.
Locate the port material which you are going to use, and cut it to the
appropriate length. 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. Round over the inside edges of both ends
of the port with a router or file to minimize port noise.
5.
Assemble the enclosure, using wood glue and silicone at all joints to
ensure your that enclosure is sealed properly. Air leaks will affect the
performance of your subwoofer even in ported enclosures. Leave one
panel removable for access to the woofer.
6.
7.
Place the woofer into the hole which you have cut in the baffle to
check the fit.
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.
9.
Vacuum out any wood shavings and dust from the inside of the
enclosure. (Failure to do so may void your warranty.) Then, line the
ported side of the enclosure with a polyester fiberfill blanket or
fiberglass insulation about 1” thick, and loosely fill the sealed side of
the enclosure half way with polyester fiberfill.
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.
10.
11.
Install the woofer into the enclosure using #8 or larger wood screws.
Attach the removable cover to the enclosure, ensuring that there are
no air leaks.
12. 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
PowerClass C2 subwoofer brings to your audio system.
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BANDPASS ENCLOSURE
Bandpass Enclosure Diagram
P
O
W
E
RCLASS
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). If the port is very long, it may be necessary to run the port
through the sealed chamber into the ported chamber. To calculate the
2
displacement of the port: (Outside) Radius x 3.14 x Length of the port that
is inside the enclosure.
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Additional Information
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 PowerClass dealer or
PrecisionPower Technical Service Department at
1-800-62-POWER.
Thanks again for choosing PowerClass.
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.
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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 fac-
tory 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 Preci-
sionPower
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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