Precision Power MP3 Player PC8C2 User Manual

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.  
1
BACK TO CONTENTS  
 
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.  
2
BACK TO CONTENTS  
 
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.  
3
BACK TO CONTENTS  
 
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.  
4
BACK TO CONTENTS  
 
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.  
5
BACK TO CONTENTS  
 
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.  
6
BACK TO CONTENTS  
 
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.  
7
BACK TO CONTENTS  
 
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  
8
BACK TO CONTENTS  
 
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.  
9
BACK TO CONTENTS  
 
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  
10  
BACK TO CONTENTS  
 
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.  
11  
BACK TO CONTENTS  
 
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  
12  
BACK TO CONTENTS  
 
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.  
13  
BACK TO CONTENTS  
 
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.  
14  
BACK TO CONTENTS  
 
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).  
15  
BACK TO CONTENTS  
 
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.  
16  
BACK TO CONTENTS  
 
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.  
17  
BACK TO CONTENTS  
 
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.  
18  
BACK TO CONTENTS  
 
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.  
19  
BACK TO CONTENTS  
 
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.  
20  
BACK TO CONTENTS  
 
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.  
BACK TO CONTENTS  
 

Peg Perego Riding Toy SPST5981GR User Manual
Philips Cell Phone SE735 User Manual
Philips Clock Radio AJM180 12 User Manual
Philips CRT Television RX47 User Manual
Philips Flat Panel Television 15PF9925 12S User Manual
Philips Security Camera VCM8121 00T User Manual
Precor Treadmill 921 User Manual
Presonus Audio electronic Stereo Amplifier D8 User Manual
ProForm Home Gym PFEX33790 User Manual
ProForm Treadmill PMTL397080 User Manual