The Peavey Classic Series has been a staple in blues, country, and rock since its introduction in 1973, and the Classic 20 continues that legacy with all the modern features that players have been demanding. This includes Peavey's own microphone simulated interface with both XLR and USB outputs, 3 power attenuation options, and a speaker defeat switch for silent recording. Aside from these new features, the Classic 20 is the same reliable amp it's always been. With three 12AX7/ECC83 pre-amp tubes and two EL84 power tubes it provides all the warmth and midrange bite that Peavey Classics have become known for. A buffered effects loop and built-in digital spring reverb also make this amp a great pedal platform.