Universal Audio LA-610 Mk II - Manual (Page 36)

Specifications
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Microphone Input Impedance Selectable, 500 Ω (ohms) or 2k Ω
Balanced Line Input Impedance 20k Ω
Hi-Z Input Impedance Selectable between 2.2 M Ω or 47 k Ω
Maximum Microphone Input Level -8 dBu (2k input impedance and 15 dB Pad in)
Maximum Output Level +23 dBu (120 VAC line)
Internal Output Impedance 80 Ω
Recommended Minimum Load 600 Ω
Frequency Response 20 Hz to 20 kHz +0.5 dB
Maximum Gain 40 dB (Line), +77dB (Mic)
Noise Floor -72 dBu, 20 Hz - 20kHz (Line in, unity gain)
Compressor Ratio ~3:1, soft knee, program dependent
Limiter Ratio ~ ∞:1, soft knee, program dependent
Attack Time ~10 ms, program dependent
Release Time Dual stage: ~60 ms for 50% release,
then 1 - 15 seconds, program dependent
Tube Complement (3) 12AX7, (1) 12AT7, (1) EL84
Power Requirements 100V / 120V / 240V
Power Consumption ~ 30 watts
Power Connector Detachable IEC power cable.
Dimensions 19" W x 3.5" H x 12.25" D (two rack spaces)
Weight 12 lb.