ISP Technologies Stealth Power-Amp , stereo: 2 x 75W RMS @ 4 ohms, 2 x 60W @ 8 ohms, mono bypass: 140W @ 8 ohm or 80W RMS @ 16 ohms, smallest lightest high power amplifier for the guitarist available 22,86cm X 10,16cm X 5,08cm and 0,54 kg weight, external 19VCD switch-mode power supply included for operation from 100VAC to 240VAC, class A/B amplifier circuit for analog saturation and clipping sonic performance, internal protection for shorts and open circuit, time delay operation for POP free turn on / turn off.