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 P25FS Expert Series shallow-mount 10" 4-ohm component subwoofer at Crutchfield