Image Dynamics USA IDQ V4 Series Owner's Manual page 5

DUAL VOICE COIL WIRING
(DUAL 2 OHM)
SERIES
PARALLEL
Parallel wiring a dual 2 ohm sub = 1 ohm Series wiring a dual 2 ohm sub = 4 ohm
PARALLEL-PARALLEL
SERIES PARALLEL
Parallel-Parallel wiring two dual 2 ohm subs = 1/2 ohm Series-Parallel wiring two dual 2 ohm subs = 2 ohm
NOTE: Never connect only one coil of a Dual Voice Coil (DVC) speaker.
BOTH voice coils must be connected to the amplifier
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