Precision Power PRO 104, PRO 124 Owners Manual
PRO SubWoofers
PRO 104 PRO 124
TABLE OF CONTENTS
Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Caution
Specifications
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Wiring Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Enclosure Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Notes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
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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
Directed Part Number 28206 28216
Model Number PRO104 PRO124
Thiele/Small parameters
Fs (free-air resonance, Hz) 44.51 42.26
Vas (equivalent compliance, cu. ft.) 0.319 0.656
Vas (equivalent compliance, liters) 9.03 18.58
Qms (Q, mechanical) 6.76 7.68
Qes (Q, electrical) 1.01 1.03
Qts (total driver Q) 0.88 0.91
Re (DC resistance, ohms) 5.8 5.8
Z (nominal impedance, ohms) 2 x 4 2 x 4
Le (inductance, mh) 1.46 1.47
Efficiency (1W @ 1M, dB) 80.87 83.23
Xmax (one way linear excursion, in.) 0.91 0.91
Xmax (one way linear excursion, mm) 26.5 26.5
Pe (continuous power handling, watts) 1000 1000
Peak power handling (music, watts) 2000 2000
Mms (total moving mass, grams) 218 260
Cms (mechanical compliance, mm/N) 0.059 0.055
Bl (motor strength, Tesla-M) 18.68 19.72
Sd (effective radiating area, sq. cm.) 330.06 491.03
Sd (effective radiating area, sq. in.) 51.18 76.11
Frequency range (Hz) 44-250 42-250
Energy Bandwidth Product (EBP) 44 41
Driver physical Dimension
Speaker Outer Diameter (inches) 10.71 12.44
Speaker Outer Diameter (mm) 272 316
Mounting hole diameter (inches) 9.29 11.06
Mounting hole diameter (mm) 236 281
Mounting depth (inches) 7.09 8.07
Mounting depth (mm) 180 205
Magnet Weight (Oz) 155 155
Basket diameter (inches) 10.71 12.44
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recommended Enclosures
Typical sealed enclosure (cu. ft.) 0.6 0.9
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. Just enough ma
terial to line the inside of the enclosure is required.
Specifications subject to change without notice
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FEATurES
1 Woven Fiberglass over a Rohr cell foam center – flat panel.
2 Tall, wide, balanced, NBR Foam (high density expanded
polyester foam) surround for linear controlled long excursion
using a Tri Radius symmetrical edge design optimized on
non-linear FEA
3 Rubber wrap around two way mounting gasket.
4 Custom Cast Aluminum frame.
5 Aluminum flat panel to voice coil former attachment yoke.
6 Custom terminals and impedance jumpers.
7 Tinsel leads woven to single flat interlaced Conex spider.
8 Voice coil former vent holes. Part of enhanced voice coil
cooling system (forced convection).
9 10mm thick steel front gap plate. Part of Mmag dual gap
motor assembly.
10 Magnetic ring consisting of 12 donut style ceramic magnets
for front gap of dual gap motor. Part of Mmag dual gap
motor assembly. Total magnet weight of items 10 & 14 is 155
oz.
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11 10mm thick steel rear gap plate. Part of Mmag dual gap
motor assembly.
12 10mm thick steel rear plat / pole piece T yoke Part of Mmag
dual gap motor assembly.
13 1 inch flared Vent. Part of enhanced voice coil cooling system
(forced convection).
14 Two stack ceramic magnet for rear gap Part of Mmag dual
gap motor assembly. Total magnet weight of items 10 & 14 is
155 oz.
15 High temperature (Polyester Amide Amide Resin Coated)
Copper dual voice coil (2x4 ohm) wound on an).
16 Voice coil heat pick-up and heat sink assembly that also
serves as a control for flux and heat build up and control
in the dual gap motor. Part of enhanced voice coil cooling
system (forced convection – aluminum heat sinking –shorting
rings to reduce inductive heating).
17 Aluminum voice coil former (voice coil is a 3”).
18 Vented spider ring and terminal block assembly. Integrates
custom terminals and impedance jumper block. Venting in
spider ring is part of enhanced voice coil cooling system
(forced convection).
19 Vent holes in flat panel yoke assembly. Part of enhanced
voice coil cooling system (forced convection – aluminum heat
sinking –shorting rings to reduce inductive heating).
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