The PreSonus ADL 600 is a hand-made, high voltage Class A, two channel tube microphone preamplifier designed by world-renown tube circuit designer Anthony DeMaria.
The ADL 600 has six high-voltage vacuum tubes (three per channel), military-grade switched attenuators, analog VU and LED metering, instrument input, line input and selectable microphone input impedance.
The ADL 600 utilizes extremely high voltage power rails (600V peak to peak) delivering 75dB of gain, over 30dB of headroom, and extremely wide frequency range of 5Hz to 80kHz within 0.5dB.