Audiopipe TS-VR15 - Manual (Page 8)

Series/Parallel Wiring for Three Dual Voice Coil 2Ω Subs
Parallel Wiring for One Dual Voice Coil 4Ω Subs
Series/Parallel Wiring for Four Dual Voice Coil 2Ω Subs
Parallel Wiring for Two Dual Voice Coil 4Ω Subs
Series/Parallel Wiring for Two Dual Voice Coil 4Ω Subs
Series/Parallel Wiring for Three Dual Voice Coil 4Ω Subs