Blaupunkt GTB 8200A Subwoofer System (Black) Blaupunkt GTB 8200 A. Active subwoofer system 200 mm/Spun Paper Cone (SPC), class-D 75/200 watts, 92 dB 30 - 200 Hz 70 - 190 Hz 0.3 - 8 V / 0 - 180 degree high level + RCA/C inch.