Mini amplifier with USB port. 12 Vol RMS Power (4 ohms). 20W x2. S / N: 85dB.Variable Crossover.Control gain level. RCA output.Frequency Response: 20Hz-20KHz. 4 "long x 3" wide x 1.5 "high.

Car amplifier.Four channels.Power: 80 Watts (RMS) / 400 Watts (max.).Impedance: 4 Ohms. 140mm (length) x 170mm (width) x 43mm (height).

MOSFET amplifier. 4 channel.Controlled variable input level. Input Sensitivity: 200mV-4V. RCA line input and speaker. RMS Power: 50W x 4 (4 ohms); 100w x 4 (2 ohms).Power max .: 180w x 4. S / N: 100dB.