YAMAHA MS101-4 powered Monitor Speaker full-range bass-reflex 30W Black

Rated Output Dynamic: 30W Continuous: 20W. Amplifier drive system: Class-D. Input Impedance: [Front] INPUT: LINE=5.4kΩ / MIC=5.4kΩ, [Rear] INPUT LINE 1,2: 10kΩ. Playback frequency range (-10dB): 77Hz to 20kHz.

eBay