Power Acoustik STW-10, STW-12 User Manual
Parallel voice coil configuration
+
+
4-ohm
4-ohm4-ohm
4-ohm
+
+
Amplifier
1-ohm Load
Amplifier
2-ohm Load
++
4-ohm
4-ohm
STW-10
STW-12
Series voice coil configuration
4-ohm
4-ohm
Amplifier
8-ohm Load
4-ohm
Series/Parallel voice coil configuration
4-ohm
Amplifier
Load
4-ohm
4-ohm
4-ohm
Owner's manual
Power Acoustik STW Series Woofers
Congratulations on your purchase of one of the finest woofers available
for your vehicle today.
If you are an enthusiast that plays your system loud and hard, the STW
woofers will take you to the limit. Our small sealed enclosure, high
excursion design will move enough air to part your hair. Let your
woofers do all the talking to let everyone know you are "Serious about
your sound".
Please take a few monents to fill out the warranty card and review this
manual before installing this woofer for proper connections and box
sizes.
Common Features:
Wide Foam Surround
One Piece Cone/Dust Cap Assembly
Large Diameter Poly-Cotton Spider
Integrated Tinsel Leads
Dual 4 ohm BASV Voice Coils
Reinforced Aluminum Voice Coil Former
Die Cast Aluminum Basket
1-Piece Rubber Gasket
Black Chrome Finish
Chrome Push Terminals
Vented Pole Piece
Specifications:
STW-10
800 watts power handling
400 watts RMS
100 oz. magnet
2" BASV voice coil
SPL 88 dB
Fs:35 Hz
Vas:.8 cu.ft.
Qms: 8.133 Qes: .4778 Qts:.4513
Xmax:.3"
STW-12
1000 watts power handling
500 watts RMS
120 oz. magnet
2.5" BASV voice coil
SPL 89 dB
Fs:32.8 Hz
Vas:1.7 cu.ft.
Qms: 4.49 Qes: .737 Qts:.683
Xmax:.3"
Recommended box sizes
Model Sealed Box Size Ported Box Size Port (dia x length)Tune Freq. #of Ports
STW-10
STW-12
.7 cu. ft.
1 cu. ft.
1 cu. ft.
1.5 cu. ft.
38 Hz
35 Hz
1
1
3" x 10"
3" x 7.75"
Building the Enclosure
Determine the dimensions of your enclosure.
Be certain the box dime
nsions that you have designed will fit in the
location you have chosen in your vehicle. Sometimes making a
cardboard box with the same
outside dimensions is helpful.
It is recommended to use .75* inch thick MDF (medium density
fiberboard) to build you speaker
box.
Use a "T" square to verify precise right angle cuts before you assemble
the box. Use high quality wood glue and screws to assem
guarantee an airtight box that will not come
apart due to excess vibrati
ble the box to
on and pressure. It is recommended for sealed enclosures to stuff the
interior of the box with approximately 50% Dacron or Polyester
fiberfill for increased sound damping and woofer performance.
For ported enclosures, it is recommended to staple 1" thick Dacron or
Polyestrer insulation to the interior walls of your box.
Use slide on connectors for spade style connectors or bare wire for push
and screw terminals. Do not solder the wires to the factory connectors
as this may cause damage to the voice coil or tinsel lead and may void
your warranty.
Recommended wiring
The following page will give you a few different options to match the
impedance of the woofers to the impedance capability of the amplifier.
Please read and follow the diagram
woofer performance.
s closely to insure maximum
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