HIGH PERFORMANCE
SUBWOOFERS
MODELS PSPL-10 AND PSPL-12
OWNER’S MANUAL
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other in parallel, a 0.5-Ohm monaural output would result (See Fig. 2). On the other
hand, if your amplifier is rated for 2-Ohm operation in bridged or one-channel operation,
series-connect the woofer voice coils (See Fig. 3). If the amplifier is rated for 4 Ohms,
interconnect the voice coils of the woofer in series as shown to obtain an 4-Ohm mon-
aural output (See Fig. 4).
PARALLEL
SERIES
+
-
-
+
1 Ω
-
+
4 Ω
4 Ω
1 Ω
MONO
2 Ω
MONO
-
+
-
+
-
+
Fig. 1
Fig. 3
-
+
-
-
1Ω
+
+
1 Ω
4 Ω
4 Ω
MONO
0.5 Ω
MONO
+
+
+
-
-
-
Fig. 4
Fig. 2
SERIES/PARALLEL STEREO CONNECTION
Series wiring of each of two, dual voice-coil 2 Ohm woofers will result in a total
impedance load of 4 Ohms at each channel of the amplifier (See Fig. 5). Otherwise,
connect one woofer to each channel for 2 Ohm stereo operation (See Fig. 6), or two
parallel-wired woofers (one-per-channel) for 1-Ohm stereo operation (See Fig.7).
+
-
+
4 Ω
-
L
2 Ω
STEREO
+
-
+
4 Ω
STEREO
+
2 Ω
-
-
4 Ω
Fig. 6
R
-
+
1 Ω
+
-
L
Fig. 5
+
-
+
1 Ω
STEREO
-
1Ω
R
+
-
Fig. 7
3
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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 all joints tight
Brace all walls
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.
4
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Thiele/Small Parameters
PSPL-10
PSPL-12
Series
Parameters
Series
Parallel
38.40 Hz
0.95 Ohms
4.32 Ohms
2.55
Parallel
Fs
Re
38.88 Hz
3.97 Ohms
31.88 Ohms
3.89
32.44 Hz
4.01 Ohms
41.37 Ohms
4.41
32.14 Hz
0.99 Ohms
10.37 Ohms
4.34
Res
Qms
Qes
0.48
0.56
0.43
0.42
Qts
0.43
0.46
0.39
0.38
R2
8.69 Ohms
29.44 Ltrs
68.43Gms
245 M/Ntn
2.53 Ohms
30.17Ltrs
68.43Gms
251 M/Ntn
12.65 Ohms
54.81 Ltrs
106.45 Gms
226 M/Ntn
3.18 Ohms
55.84 Ltrs
106.45 Gms
230 M/Ntn
Vas (Sd)
Mms (Sd)
Cms (Sd)
Bl (Sd)
SPLref (Sd)
11.31 Tesla-M 5.30 Tesla-M 14.27 Tesla-M 7.16 Tesla-M
87.4 dB
86.7 dB
88,2 dB
88.3 dB
5
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Recommended Enclosure Designs
PSPL-12
PSPL-10
(Vb) Box Volume = 0.56 Cu. Ft.
SEALED BOX F3: 42 Hz
(Vb) Box Volume = 0.77 Cu. Ft.
F3: 64 Hz
Dimensions: 11.5" W x 16" H x 5.25" D
Dimensions: 13.5" W x 17.75" H x 5.5" D
(Vb) Box Volume = 1.15 Cu. Ft.
F3: 42 Hz
Dimensions:12.5" W x 20.25" H x 7.75" D Dimensions: 14.13" W x 23" H x 8.75" D
(Vb) Box Volume = 1.68 Cu. Ft.
F3: 36 Hz
VENTED BOX
(P) Port = 2" ID x 7.875" Long
(P) Port =3" ID x 8.75" Long
Vbt = 1.15 Cu. Ft. (total)
Vbt = 1.23 Cu. Ft. (total)
Vbs = .58 Cu.Ft. (sealed side)
Vbp = .57 Cu. Ft. (ported side) (speaker
loads into this side)
Vbs = .59 Cu.Ft. (sealed side)
Vbp = .64 Cu. Ft. (ported side) (speaker
loads into this side)
BANDPASS
BOX (4th
order)
Port = 3" ID x 9.25" Long
Port = 3" ID x7.125" Long
F3: 39 Hz & 100 Hz with negligible gain
10" W (inside) x 16.125" H (inside) x
6.125" D (inside) (sealed side) x 6" D
(inside) (vented side)
F3: 38 Hz & 115 Hz with negligible gain
12" W (inside) x 16.125" H (inside) x
5.125" D (inside) (sealed side) x 5.625" D
(inside) (vented side)
© 2000 Audiovox Corporation, Hauppauge, NY 11788
128-5809
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