How to wire 4 dual 4 ohm subs to 0.5 ohm

To wire 4 dual 4 ohm subs to 0.5 Ω: Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.

The other final loads these subs can make: 2 Ω, 8 Ω, 32 Ω.

0.5 Ω: Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.

Every balanced way to wire 4 dual 4 ohm subs

Every balanced way to wire 4 dual 4 ohm subs
Final load	How
0.5 Ω	Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.
2 Ω	Each sub’s two coils in series: 8 Ω per sub. Subs in parallel.
2 Ω	Each sub’s two coils in parallel: 2 Ω per sub. 2 pairs in series, the two subs of each pair in parallel.
8 Ω	Each sub’s two coils in series: 8 Ω per sub. 2 pairs in series, the two subs of each pair in parallel.
8 Ω	Each sub’s two coils in parallel: 2 Ω per sub. Subs in series.
32 Ω	Each sub’s two coils in series: 8 Ω per sub. Subs in series.

On each sub, join A + to B + and A − to B −.

Every sub’s + to amp +, every sub’s − to amp −.

Each box is one voice coil. Wires that meet are joined; use proper terminals, not twisted wire and tape.

Left side of each coil box is its + terminal. 1A = sub 1, coil A.

Nominal loads: the real impedance rises in the box and with frequency. Only balanced layouts are shown, where every sub gets the same power.

To wire 4 dual 4 ohm subs to 0.5 Ω: Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.

With balanced wiring: 0.5 Ω, 2 Ω, 8 Ω, 32 Ω.

Only if its manual says it is stable at 0.5 Ω or lower. Below that it runs hot, goes into protect or fails.