GZRB 30SPL Diameter 30 cm / 12″ Power Handling 1350 Watts SPL Impedance 2x 2 Ohms Net Volume 66.6 L / 2.35 cu.ft. Dimensions (B x H x T1/T2) 650 x 380 x 450/330 mm GZIA 1.1500D – High-Quality Class D amplifier – Channels: 1 – Output Power (@ 4Ω): 775 Watts RMS – Output Power (@ 2Ω): 1300 Watts RMS – Output Power (@ 1Ω): 1500 Watts RMS – Frequency Response: 10 – 250 Hz – Low pass filter 30 Hz – 250 Hz (12 dB/oct) – Total harmonic distortion (THD+N) 0.08% – Damping factor 100 – Input sensitivity 200 mV – 6 V – Bass remote control included Dimensions (W x L x H) 192 x 302 x 49 mm / 7.56 x 11.89 x 1.93″.