GZIA 200.2 specs: Type High power class A/B amplifier Channels 2 Output Power (@ 4Ω) 2x 135 Watts RMS Output Power (@ 2Ω) 2x 220 Watts RMS max. Output Power (CEA-2006A / 10%THD+N) 550 Watts Ouput power (@ 4Ω) bridged 460 Watts RMS Frequency Response 8 Hz – 28 kHz HPF / LPF / BPF ● / ● / ○ Bass Boost / Phase Shift ● / ○ High-Level Input / Auto-on ● / ● Remote Control included BIAS Setting ○ Linkmode ○ Dimensions (w x h x L) 168 x 49 x 248 mm / 6.61″ x 1.93″ x 9.76″ GZIB 30BR Specs: Diameter 30 cm / 12″ Power Handling (RMS) 350 Watts Impedance 4 Ohms Net Volume 37 L / 1.31 cu.ft. Subwoofer GZIW 300 Dimensions (B x H x T1/T2) 460 x 320 x 327/255 mm / 18.11 x 12.60 x 12.87/10.04″.