Are you looking to add some extra kick to your car's audio system? HELIX made their Competition C6B 6-3/4" midbass speakers from Agave sisalana, an extremely stiff natural fiber, to give you the tight, responsive performance you want. The C62C or C63C component speaker systems from Helix feature an extra set of woofer outputs on their crossover networks. These C6B speakers are duplicates of the ones in these component systems, so they are perfect for adding even more midbass impact.
These speakers will also work fine as standalone midbass drivers. You can feed them plenty of power — up to 150 watts RMS — so there's no need to be shy with the volume control.
Note: HELIX describes this model as a 6-1/2" speaker. Most manufacturers designate this same frame size as a 6-3/4" speaker. For simplicity's sake we list it as a 6-3/4" speaker.