Precision Power PCX 102 User manual

PowerClass SubWoofers
PCX 102 PCX 104 PCX 122 PCX 124

TABLE OF CONTENTS
Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Enclosure Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2

CONGRATULATIONS
Thank you for choosing PrecisionPowerTM woofers. Designed and
engineered in the USA, this product combines innovative technology
with the finest materials to consistently deliver Absolutely State of
the Art
™performance, sound quality, reliability, and value. This
PrecisionPowerTM product reflects our commitment to offer you
unparalleled performance and quality for years of dependable
service and listening enjoyment.
Included in this manual are a number of different enclosure
suggestions.These are by no means the only enclosures to use, but
they provide a starting point.To determine the correct enclosure for
your needs many factors must be addressed (amount of power,
vehicle, placement, crossovers, etc.) Therefore, as always
PrecisionPowerTM recommends that your subwoofer be installed by
an authorized
PrecisionPowerTM dealer
CAUTION
Extended use of a high powered audio system may result in hearing
loss or damage. While PrecisionPowerTM systems are capable of
“Concert Level” volumes with incredible accuracy, they are also
designed for you to enjoy at more reasonable levels all of the sonic
subtleties created by musicians. Please observe all local sound
ordinances.
3

SPECIFICATIONS
Note: Specifications subject to change without notice.
Directed Part Number PCX 102 PCX 104 PCX 122 PCX 124
Model Number 28102 28107 28112 28117
Thiele/Small Parameters
Fs (free-air resonance, Hz)36.7 39.77 22.07 24.2
Vas (equivalent compliance, cu. ft.)0.75 0.64 4.38 3.96
Vas (equivalent compliance, liters)21.09 17.96 123.96 112.15
Qms (Q, mechanical)3.56 3.46 3.58 2.98
Qes (Q, electrical)0.96 1.03 0.62 0.65
Qts (total driver Q)0.75 0.79 0.53 0.54
Re (DC resistance, ohms)3.7 73.7 7
Z (nominal impedance, ohms)2 x 2 2 x 4 2 x 2 2 x 4
Le (inductance, mh)2.12 3.23 2.13 3.24
Efficiency (1W @ 1M, dB) 82.26 82.3 85.22 85.78
Xmax (one way linear excursion, in.)0.63 0.63 0.63 0.63
Xmax (one way linear excursion, mm)16.1 16.1 16.1 16.1
Pe (continuous power handling, watts)300 300 300 300
Peak power handling (music, watts)600 600 600 600
Mms (total moving mass, grams)129 129 152 140
Cms (mechanical compliance, mm/N)0.145 0.124 0.342 0.309
Bl (motor strength, Tesla-M)10.7 14.82 11.22 15.13
Sd (effective radiating area, sq. cm.)320.5 320.5 506.71 506.71
Sd (effective radiating area, sq. in.)49.692 49.692 78.54 78.54
Frequency range (Hz) 36.7-250 39.8-250 22.1-250 24.2-250
Energy Bandwidth Product (EBP) 38 39 36 37
Driver Physical Dimension
Speaker Outer Diameter (inches)10.118 10.118 12.992 12.992
Speaker Outer Diameter (mm)257 257 330 330
Mounting hole diameter (inches)9.212 9.212 11.1 11.1
Mounting hole diameter (mm)234 234 282 282
Mounting depth (inches)5.866 5.866 6.18 6.18
Mounting depth (mm)149 149 157 157
Magnet Weight (oz)65 65 70 70
Basket diameter (inches)10.118 10.118 12.992 12.992
4

SPECIFICATIONS (Continued)
FEATURES
1. Wrap around gasket to accom-
modate either front or rear mounting
alternatives
8. 8mm steel vented T yoke back
plate/pole piece
2. High density NBR foam surround 9. 1” flared vent
3. Glass fiber honey comb flat panel 10. Dual 4 ohm copper voice coil
4. Stamped steel basket 11. Kapton voice coil former
5. Push terminals (1 pair each side) 12. Progressive roll Conex spider
6. 8mm steel front plate 13. Vent holes in cone assembly for
additional cooling
7. Double stack ceramic magnets
(65 oz. on 10” and 70 oz. on 12”) 14. Paper cone assembly to support and stabilize the flat panel
1
13
14
12
11
10
23
4
5
6
7
8
9
Recommended Enclosures
Typical sealed enclosure (cu. ft.)0.6 0.6 1.25 1.25
SPL sealed enclosure (cu. ft.)0.5 0.5 1 1
Typical vented enclosure (cu. ft.)0.9 0.9 1.25 1.25
Port Tuning (Hz)32 32 29 29
Port Diameter (inside, in.)2.25 2.25 2.6 2.6
Port Length (in.)10 10 12 12
Equivalent Square Port (in.) 2 x 2 2 x 2 2.3 x 2.3 2.3 x 2.3
Enclosure Details
1. External dimensions calculated for 3/4" building material.
2. Includes speaker displacement.
3. Volumes given are net tuning volume.
4. Enclosures include a minimal amount of damping material. Use just enough
material to line the inside of the enclosure.
5

6
WIRING CONFIGURATIONS
The following illustrations provide guidelines on properly connecting
your
PrecisionPowerTM woofer to a PrecisionPowerTM amplifier for
maximum power and performance using common parallel, and
series/parallel wiring configurations.
Parallel—One Speaker (dual 2 ohm voice coils)
One dual 2 ohm voice coil woofer with voice coils in parallel results
in a 1 ohm load to the amplifier.
1. Connect the speaker in parallel by connecting the two positive (+)
terminals together and the two negative (-) terminals together.
2. Wire the positive (+) terminals of the woofer to the positive (+)
terminal on the amplifier. Wire the negative (-) terminals of the
woofer to the negative (-) terminal on the amplifier.
2 ohm
2 ohm
++
--
+
-
Recommended Amplifier Power
1 woofer 200 to 600 watts
2 woofers 400 to 1200 watts
3 woofers 600 to 1800 watts
4 woofers 800 to 2400 watts

Parallel—Two Speakers (dual 4 ohm voice coils)
Two dual 4 ohm voice coil woofers with voice coils in parallel and the
two woofers in parallel results in a 1 ohm load to the amplifier.
1. Connect the speaker in parallel by connecting the four positive (+)
terminals together and the four negative (-) terminals together.
2. Wire the positive (+) terminals of the woofers to the positive (+)
terminal on the amplifier. Wire the negative (-) terminals of the
woofers to the negative (-) terminal on the amplifier.
4 ohm 4 ohm
++
--
4 ohm 4 ohm
++
--
+
-
7

Parallel—One Speaker (dual 4 ohm voice coils)
One dual 4 ohm voice coil woofer with voice coils in parallel results
in a 2 ohm load to the amplifier.
1. Connect the speaker in parallel by connecting the two positive (+)
terminals together and the two negative (-) terminals together.
2. Wire both positive (+) terminals of the woofer to the positive (+)
terminal on the amplifier. Wire both negative (-) terminals of the
woofer to the negative (-) terminal on the amplifier.
4 ohm 4 ohm
++
--
+
-
8

Series-Parallel—Two Speakers (dual 2 ohm voice coils)
Note: Verify and ensure that the woofer wiring is connected as
shown with the negative connection from the first woofer coil
connected to the positive connection of the second woofer coil.
Two dual 2 ohm voice coil woofers with voice coils in series and then
parallel the two series woofers results in a 2 ohm load to the
amplifier.
1. Connect each woofer in series by connecting the negative (-) of
the first coil to the positive (+) terminal of the second coil.
2. Wire the positive (+) terminal of each woofer’s first coil to the
positive (+) terminal on the amplifier. Wire the negative (-) terminal
of each woofer’s second coil to the negative (-) terminal on the
amplifier.
2 ohm 2 ohm
++
--
2 ohm 2 ohm
++
--
+
-
9

Series-Parallel—Three Speakers (dual 4 ohm voice coils)
Note: Verify and ensure that the woofer wiring is connected as
shown with the negative connection from the first woofer coil
connected to the positive connection of the second woofer coil.
Three dual 4 ohm voice coil woofer with voice coils of each woofer
wired in series and then parallel the three woofers for a resulting
2.67 ohm load to the amplifier.
1. Connect each woofer in series by connecting the negative (-) of
the first coil to the positive (+) terminal of the second coil.
2. Wire the positive (+) terminal of each woofer’s first coil to the
positive (+) terminal on the amplifier. Wire the negative (-)
terminal of each woofer’s second coil to the negative (-) terminal
on the amplifier.
4 ohm 4 ohm
++
--
4 ohm 4 ohm
++
--
4 ohm 4 ohm
++
--
+
-
10