How to wire 3 dual 4 ohm subs to 0.67 ohm

To wire 3 dual 4 ohm subs to 0.67 Ω: Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.

The other final loads these subs can make: 2.67 Ω, 6 Ω, 24 Ω.

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

Every balanced way to wire 3 dual 4 ohm subs

Every balanced way to wire 3 dual 4 ohm subs
Final load	How
0.67 Ω	Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.
2.67 Ω	Each sub’s two coils in series: 8 Ω per sub. Subs in parallel.
6 Ω	Each sub’s two coils in parallel: 2 Ω per sub. Subs in series.
24 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 3 dual 4 ohm subs to 0.67 Ω: Each sub’s two coils in parallel: 2 Ω per sub. Subs in parallel.

With balanced wiring: 0.67 Ω, 2.67 Ω, 6 Ω, 24 Ω.

Only if its manual says it is stable at 0.67 Ω or lower. Below that it runs hot, goes into protect or fails.