Precision Power PC.18DS - Manual (Page 2)

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Thank you for choosing PrecisionPower woofers. Designed and
engineered in the USA, this product combines innovative technol-
ogy with the finest materials to consistently deliver
Absolutely State
of the Art ™ performance, sound quality, reliability, and value. This
PrecisionPower
product reflects our commitment to offer you
unparalleled performance and quality for years of dependable ser-
vice and listening enjoyment.
Features, Parameters, & Dimensions
series wired PC.15DS PC.18DS
Fs (Hz) 48.02 35.99
Qms 7.247 6.391
Vas (ft³) 2.184 5.329
Cms (mm/N) 0.0698 0.0674
Mms (g) 157.4 290
Rms (kg/s) 6.555 10.27
Xmax (mm) 2 1.5
Xmech (mm) 17 16.5
Piston Diameter (in) 14.1 16.69
Sd (in²) 122.45 194.68
Qes 0.424 0.521
Re ( Ω) 7.2 7.2
Z ( Ω) 8 8
BL (Tm) 28.41 31.76
Rms Power (watts) 1,200 1,600
Qts 0.4 0.482
NO (%) 1.562 1.306
1w/1m SPL (dB) 93.96 93.18
2.8V SPL (dB) 94.54 93.31
Voice Coil Diameter (in) 3” 4”
Impedance ( Ω) DVC 4 Ω DVC 4 Ω
M-vd (ft. 3 ) 0.27 0.43
Overall Diameter (in.) 15.5” 18.25”
Overall Height (in.) 7.25” 9.625”
Cutout Diameter (in.) 14.125” 16.75”
Mounting Depth (in.) 6.75” 8.875”
Cast Aluminum Basket
Pressed Paper Cone
Aluminum Phase Plug
4 Layer Voice Coil
Aluminum VC Former
Dual Conex Spiders
Reinforced Foam Surround
Compression Terminals
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Included in this manual are a number of different enclosure sugges-
tions. 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 PrecisionPower
recommends that your subwoofer be installed by an authorized
PrecisionPower
dealer.
Enclosure Dimensions
All enclosures should be made of .75” (3/4”) material only. When
possible, make the baffle 1.5” (1 ½) thick and add .75” (3/4”) to the
depth of the enclosure to compensate. All volumes INCLUDE vent/
port and subwoofer displacements. DO NOT change the volume
unless you plan on adding a substantial amount of bracing. For
added performance, applying a coat of fiberglass resin to the interior
walls will greatly improve sealing the enclosure. Adding a thin layer
of poly-fill will improve response by smoothing out reflections
within the enclosure.
Enclosure Construction
Enclosure Recommendations
PC.15DS High Tuned Ported PC.15DS Low Tuned Ported
Vol.
(ft. 3 )
Dimensions
(H x L x D)
Port
(dia. x L)
Freq.
(Hz)
Vol.
(ft. 3 )
Port
(dia. X L)
Freq.
(Hz)
-3dB
(Hz)
3.50 18x23.75x18 (4) 4”x10” 56.3 3.50 (2) 4”x10” 40.8 40.1
4.00 18x27x18 (4) 4”x10” 52 4.00 (2) 4”x10” 33.1 34.1
4.50 18x30.25x18 (4) 4”x10” 48.5 4.50 (2) 4”x10” 28.4 31.2
PC.18DS High Tuned Ported PC.18DS Low Tuned Ported
Vol.
(ft. 3 )
Dimensions
(H x L x D)
Port
(dia. X L)
Freq.
(Hz)
Vol.
(ft. 3 )
Port
(dia. X L)
Freq.
(Hz)
-3dB
(Hz)
4.00 20”x21.75”x20” (5) 4”x15” 53.2 4.00 (3) 4”x15” 40.4 42.2
5.00 20”x27”x20” (5) 4”x15” 46 5.00 (3) 4”x15” 35.3 37.8
6 00 20”x32”x20” (5) 4”x15” 41.3 6.00 (3) 4”x15” 31.8 35.2
Dimensions
(H x L x D)
18x23.75x18
18x27x18
18x30.25x18
Dimensions
(H x L x D)
20”x21.75”x20”
20”x27”x20”
20”x32”x20”
-3dB
(Hz)
48.9
45.4
42.7
-3dB
(Hz)
47.3
41.2
37.3