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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).
3
4 Ω
STEREO
-
+
-
+
4 Ω
8 Ω
STEREO
L
R
-
+
-
+
8 Ω
-
+
-
+
8 Ω
2 Ω
STEREO
R
L
-
+
-
+
2 Ω
-
+
-
+
2 Ω
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).
Fig. 7
Fig. 6
Fig. 5
1 Ω
MONO
2 Ω
MONO
4 Ω
MONO
8 Ω
MONO
2
-
+
-
+
2 Ω
-
+
-
+
2 Ω
-
+
-
+
2 Ω
-
+
-
+
8 Ω
-
+
-
+
8 Ω
-
+
-
+
8 Ω
Fig. 1
PARALLEL
SERIES
Fig. 4
Fig. 3
Fig. 2