All valve, 30 watt, channel switching combo. This amplifier sports two dual stage channels with completely separate signal paths. The result is two vintage amps in one. Channel One has a thick, creamy, classic voice that barks like a rottweiler when pushed in to the tone zone. Channel Two has a tighter, springy and slightly faster character with a little more upper mids and a bit more gain. The AD30TC combo has consistently stood above the competition, as confirmed by professional users and reviewers alike. It retains the original vintage sound and utilizes a smooth electron emissions GZ34 valve rectifier, similar to the first original valve amplifiers ever made, and operates in Class A. This makes the AD30TC a true force to be reckoned with when played alongside any "vintage" classic and high price tag, boutique amplifier. This amp has proved to be so popular worldwide that its specification remains unchanged.