I would recommend Adcom, Soundstream (pre 2000 buyout), Nakamichi, TRU, Arc, A/D/S/, Audison, Brax, Mcintosh, Linear Power, Lunar, Butler Audio, 1990's PPI, ZED audio, 1990's japan built Alpine. I personally think that there are almost no good car audio company's left. All the amps and subs...