BB Distribution - The 4 Focal Flax subwoofers consist of straightforward 4-Ohm voice coils which are perfectly suited for small enclosures (closed or bass-reflex) as small as 0.35 CuFt. The Flax subwoofers
Focal Performance Sub P 25 10" 4-ohm subwoofer at Crutchfield
Focal Sub p 30 f Performance Expert 12 Subwoofer (each) Sms Car Audio
Focal Flax Cone P 25 F - 10" 25cm Car Subwoofer 600 Watts Bass Woofer 3544053750149 | eBay
Focal SUB-P-25-FE 250mm / 600w Subwoofer - Used Good - Creative Audio