Based on the power and tone of the Holy Grail 1959 Plexi head, the YJM100 offers the ultimate Neo-Classical amp with the following cutting edge features: 1. Footswitchable* Boost with controls for Volume and Gain on the rear panel. 2. Footswitchable* Noise Gate with rear panel Threshold control. 3. Footswitchable* studio quality Digital Reverb with rear panel Level control. 4. Footswitchable* Series FX Loop 5. Half power switch which takes the output power from 100W to 50W when engaged. 6. Built-in, infinitely variable Attenuator control which can take the output stage from 100% to 0.01% and anywhere in-between, while retaining the all-important tone and feel of the all-valve power section. This means the output power can be reduced to a staggering low of 0.05 Watts when in 50W power mode. 7. Valve Failure Circuitry: meaning that if one of the output valves develops a fault, a visual indicator on the rear of the amplifier shows which one is working incorrectly. This “roadie friendly feature” will save valuable time getting the amplifier back up and running again, should a valve failure occur. 8. Self-biasing circuitry to ensure proper power valve operation each time valves are changed. Features: 1. Output (RMS): 100/50 watt 2. 2 channels 3. 3 band EQ 4. Electronic power attenuation: 100% - 0.1% 5. Boost function 6. Noise gate 7. Reverb 8. Series effects loop 9. Auto bias feature 10. Pre-amp tubes: 4 x ECC83 11. Power amp tubes: 4 x EL34