Precision Power A.8SQ - 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 A.8SQ A.12SQ
Fs (Hz) 37.13 25.205
Qms 11.69 12.07
Vas (ft³) 0.603 3.381
Cms (mm/N) 0.301 0.293
Mms (g) 61.1 136.261
Rms (kg/s) 1.22 1.786
Xmax (mm) 9 13.85
Xmech (mm) 13.5 20.78
Piston Diameter (in) 7.17 9.729
Sd (in²) 31 74.4
Qes 0.616 0.612
Re ( Ω) 7.2 7.2
Z ( Ω) 8 8
BL (Tm) 12.91 15.933
Rms Power (watts) 180 300
Qts 0.585 0.583
NO (%) 0.137 0.242
1w/1m SPL (dB) 83.39 85.85
2.8V SPL (dB) 83.97 86.44
Voice Coil Diameter (in) 2” 2.5”
Impedance ( Ω) DVC 4 Ω DVC 4 Ω
M-vd (ft. 3 ) 0.0537 0.177
Non-Pressed Paper Cone
Injection Molded PP/Mica Dust Cap
Rubber Gasket
4-layer VC on Kapton Former
8ga. Compression Terminals
CONEX Spiders
Stamped Steel Frame
Vented T-Yoke Back-plate
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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
A.8SQ Sealed A.8SQ Ported
Vol.
(ft. 3 )
Dimensions
(H x L x D)
QTC
-3dB
(Hz)
Vol.
(ft. 3 )
Port
(dia. X L)
Freq.
(Hz)
-3dB
(Hz)
0.40 10x9.25x12 0.902 50.2 0.50 2” X 8” 40.8 40.1
0.60 10x13.25x12 0.799 47.9 0.75 2” X 8” 33.1 34.1
0.80 10x17x12 0.747 47.2 1.00 2” X 8” 28.4 31.2
A.12SQ Sealed A.12SQ Ported
Vol.
(ft. 3 )
Dimensions
(H x L x D)
QTC
-3dB
(Hz)
Vol.
(ft. 3 )
Port
(dia. X L)
Freq.
(Hz)
-3dB
(Hz)
1.00 13x14.75x13 1.144 39.7 2.00 4” x 12” 34.8 31.9
1.50 13x21.25x13 0.992 36.1 2.50 4” x 12” 31 28.5
2.00 13x27.75x13 0.904 34.3 3.00 4” x 12” 28.2 26
Dimensions
(H x L x D)
10x12.75x10.75
10x18x10.75
10x23.5x10.75
Dimensions
(H x L x D)
14x23.75x14
14x29.25x14
14x34.75x14