HIGH PERFORMANCE DUAL
FOUR-OHM VOICE COIL
SUBWOOFERS WITH
CHROME BASKET
MODELS PSW-10DC AND PSW-12DC
OWNER’S MANUAL
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two dual-voice coil 4-Ohm woofers are connected in parallel and then wired to
each other in parallel, a 1-Ohm monaural output would result (See Fig. 2). On the
other hand, if your amplifier is rated for 4-Ohm operation in bridged or one-channel
operation, series-connect the woofer voice coils (See Fig. 3). If the amplifier is rated
for 8 Ohms, interconnect the voice coils of the woofer in series as shown to obtain
8-Ohm monaural output (See Fig. 4).
PARALLEL
SERIES
+
-
-
+
2 Ω
-
+
8 Ω
8 Ω
2 Ω
MONO
4 Ω
MONO
-
+
-
+
-
+
Fig. 1
Fig. 3
-
+
-
-
+
2 Ω
+
2 Ω
8 Ω
8 Ω
MONO
1 Ω
MONO
+
+
+
-
-
-
Fig. 4
Fig. 2
SERIES/PARALLEL STEREO CONNECTION
Series wiring of each of two, dual voice-coil 4-Ohm woofers will result in a total
impedance load of 8 Ohms at each channel of the amplifier (See Fig. 5). Otherwise,
connect one woofer to each channel for 4-Ohm stereo operation (See Fig. 6), or two
parallel-wired woofers (one-per-channel) for 2-Ohm stereo operation (See Fig.7).
+
-
+
8 Ω
8 Ω
-
L
4 Ω
STEREO
+
-
+
8 Ω
STEREO
+
4 Ω
-
-
Fig. 6
R
-
+
2 Ω
+
-
L
Fig. 5
+
-
+
2 Ω
STEREO
-
2 Ω
R
+
-
Fig. 7
3
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SERIES/PARALLEL CONNECTION USING THREE WOOFERS
Three dual 4-Ohm voice-coil woofers can be connected in such a way as to produce
a 0.66-Ohm (See Fig.8) or 2.66-Ohm monaural output as shown below (See Fig.9).
+
-
+
-
+
-
+
2 Ω
2 Ω
0.66 Ω
2 Ω
-
+
+
+
-
-
-
Fig. 8
-
-
+
-
+
+
2.66 Ω
4 Ω
4 Ω
4 Ω
+
+
-
+
-
-
Fig. 9
INSTALLATION RECOMMENDATIONS
To realize the utmost in sound reproduction from your subwoofer(s), follow these
installation recommendations:
l
Use a quality large gauge wire to connect your subwoofer to the
amplifier
l
l
Use a subwoofer crossover to remove unwanted higher frequencies
Position the enclosure in the rear of the vehicle with the subwoofer
facing rearward to improve bass response and avoid cancellation
of audio frequencies
ENCLOSURE CONSTRUCTION RECOMMENDATIONS
To enhance subwoofer performance, the following general recommendations should
be addressed when constructing the speaker enclosure:
l
l
l
l
Use 3/4" MDF for your construction material
Glue all joint seams
Screw or nail all joints tight
Brace all walls
4
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DESIGNING AND BUILDING YOUR SPEAKER ENCLOSURE
The following parameters are offered to assist you in designing your own enclosure.
There are many computer software programs available on the market that, along with
this information, will allow you to construct the type of enclosure that best suits your
needs.
To obtain the best possible results, we suggest you use our recommended enclosure
designs and have an automotive sound professional build your enclosure.
Thiele/Small Parameters
PSW-10DC
Series
PSW-12DC
Series
Parameters
Parallel
46.62 Hz
2.15 Ohms
2.0 Ohms
0.75
Parallel
22.89 Hz
1.76 Ohms
16.24 Ohms
3.26
Fs
Re
32.56 Hz
6.88 Ohms
98.91 Ohms
7.06
20.96 Hz
6.88 Ohms
87.17 Ohms
4.26
Res
Qms
Qes
0.49
0.80
0.34
0.35
Qts
0.46
0.39
0.31
0.32
R2
11.55 Ohms
67.88 Ltrs
59.29 Gms
403 M/Ntn
2.98 Ohms
33.12 Ltrs
59.29 Gms
197 M/Ntn
17.88 Ohms
206.53 Ltrs
94.51 Gms
610 M/Ntn
4.42 Ohms
173.06 Ltrs
94.51 Gms
511 M/Ntn
Vas (Sd)
Mms (Sd)
Cms (Sd)
Bl (Sd)
SPLref (Sd)
13.04 Tesla-M 6.80 Tesla-M 15.96 Tesla-M 8.23 Tesla-M
88.6 dB
88.0 dB
89.4 dB
89.5 dB
5
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Recommended Enclosure Designs
PSW-12DC
PSW-10DC
(Vb) Box Volume = 1.15 Cu. Ft.
SEALED BOX F3: 55 Hz
(Vb) Box Volume = 1.42.Cu. Ft.
F3: 52 Hz
Dimensions: 12.5" W x 20.5" H x 7.75" D
Dimensions: 13.5" W x 21.75" H x 8.25" D
(Vb) Box Volume = 1.15 Cu. Ft.
F3: 45 Hz
Dimensions: 12.5" W x 20.5" H x 7.75" D
(P) Port = 2" ID x 7.875" Long
(Vb) Box Volume = 1.68 Cu. Ft.
F3: 40 Hz
Dimensions: 14.25" W x 23" H x 8.75" D
(P) Port = 2" ID x 3.75" Long
VENTED BOX
Vbt = 1.15 Cu. Ft. (total)
Vbt = 1.68 Cu. Ft. (total)
Vbs = .56 Cu.Ft. (sealed side)
Vbp = .59 Cu. Ft. (ported side) (speaker
loads into this side)
Vbs = .79 Cu.Ft. (sealed side)
Vbp = .89 Cu. Ft. (ported side) (speaker
loads into this side)
BANDPASS
BOX (4th
order)
Port = 3" ID x 6.125" Long
Port = 3" ID x 4.125" Long
F3: 42 Hz & 120 Hz with negligible gain
10" W (inside) x 16" H (inside) x 6" D
(inside) (sealed side) x 6.25" D (inside)
(vented side)
F3: 37 Hz & 110 Hz with negligible gain
12" W (inside) x 17.875" H (inside) x 6.25"
D (inside) (sealed side) x 7.125" D (inside)
(vented side)
© 2000 Audiovox Corporation, Hauppauge, NY 11788
128-5997
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