PSI Audio Active 17M Studio Red, Two-Way Active Monitor, Magnetically shielded, Integrated AOI (Adaptive Output Impedance), CPR (Compensated Phase Response) and PSC (Phantom Standby Control) system, Volume control on the back, Frequency range: 44 - 23000 Hz, Max. SPL (1m): 104 dB (single), Balanced inputs, Power RMS 80 + 40W, Dimensions: 200 x 320 x 230 mm, Weight: 8.4 kg