BOSTON ACOUSTICS GTA 1005,Boston Acoustics GTA-1005 5-channel car amplifier — 50 watts RMS x 4 at 4 ohms + 400 watts RMS x 1 at 2 ohms at Crutchfield,Boston Acoustics GTA-1000M Mono subwoofer amplifier — 1,000 watts RMS x 1 at 2 ohms at Crutchfield,BOSTON ACOUSTICS GTA 1005,BOSTON ACOUSTICS GTA-1005