The World's Finest Tube Preamplifier

ADL 600: 2-channel High-Voltage Tube Preamp

Technical Specifications

Input Impedance

Microphone Selectable, 150/300/900/1500Ω
Balanced Line 2 kΩ
Instrument 100 kΩ

Maximum Input Level

Microphone (1500Ω, +20 dB Pad out) +5 dBu
Microphone (1500Ω, +20 dB Pad in) +25 dBu
Balanced Line +30 dBu
Instrument +30 dBu

Gain Range

Microphone (1500Ω, +20 dB Pad out) 18 dB to 72 dB
Balanced Line -12 dB to 40 dB
Instrument -5 dB to 42 dB

Performance

Noise Floor (all inputs, minimum gain) -95 dBu (A-weighted)
Microphone Equivalent Input Noise (EIN) -125 dBu (A-weighted)
Frequency Response 10 Hz to 45 kHz ±1 dB
Maximum Output Level +23 dBu (@ 0.5%THD+N)
Output Impedance 600Ω
Tube Complement (per channel) 1-12AT7A, 2-6922

Power

Internal supply, standard IEC connector 115 or 230 VAC / 100W

Physical

Dimensions 2U rackmount
Height 3.5” (88.9 mm)
Depth 17" (431.8 mm)
Width 19” (482.6 mm)
Weight 28 lb. (12.7 kg)