The ADL 600 is packed with six high-voltage vacuum tubes (three per channel), military-grade switched attenuators, analog VU and LED metering as well as 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, +36dB of headroom, and extremely wide frequency range of 5Hz to 80kHz within 0.5dB. The combination of Anthony DeMaria’s preamplifier design and PreSonus’ state-of-the-art manufacturing process achieves a new standard in hand-made, high-voltage tube preamplifiers.