As others have said: HSU, SVS, Rythmik, PowerSoundAudio, and JTR.
Mom other companies (like REL, JL Audio, etc.) even come close to offering the same price:performance ratio. Not saying they make bad subs, just overpriced.
Mom other companies (like REL, JL Audio, etc.) even come close to offering the same price:performance ratio. Not saying they make bad subs, just overpriced.