This is a homebrew Class A triode push pull amplifier of 10 watts using 6EM7 oscillator tubes. These tubes contain driver and ,output in one bottle and are electrically identical to 6SL7/2A3. Tube rectified using GZ34, and CCS power supply regulation, and very low noise floor. Single input with volume control, 4/8 Ohm speaker terminals, 8X12 Hammond chassis, Hammond power and output irons. A very nice amp, great triode sound with some power. $300 OBO