• Based on Legendary Bill Putnam 610 Tube Mic Pre and EQ Used on Countless Classic Recordings
• Authentic Teletronix LA-2A-style T4 Opto-Compressor
• Complete Vintage Channel-Strip at Groundbreaking Price Within Project Studio Reach
• Mic Pre with Gain and Level Controls, Variable Impedance and Instrument DI for Recording Tone "Color"
• Mk II Features Such as True Bypass, Larger Metering and Improved Signal Output
• UA Quality and Heritage, Audiophile Components, Hand-Assembled in the USA

Mk II Improvements

• True Bypass of the Compressor Circuit
• Larger and Better-Lit Metering
• Improved Output Signal Performance
• Auto-Sensing Universal Power Supply
• Improved Stability With Feedback-Style Shelving EQ
• Improved Consistency With Input Gain Values
• LED Jewel Light Never Needs Replacing

General

• Mic, Line and Hi-Z Input, Line Output
• Dual Impedance Mic and Hi-Z Inputs (Mic: 2k, 500Ohms; Hi-Z: 2.2M, 47kOhms)
• 5-Position Stepped Preamp Input Gain, Continuous Preamp Output Level
• -15dB Pad Switch (15dB Pad/Off)
• Phase Reverse (0/180 degrees)
• 48 volt Phantom Power Switch (+48v/Off)
• +/- 9 dB Stepped High Shelving Filter (4.5, 7, 10 kHz)
• +/- 9 dB Stepped Low Shelving Filter (70, 100, 200 Hz)
• T4 Optical Compressor With Continuous Peak Reduction and Makeup Gain
• Compress/Limit/Bypass Modes of Dynamic Operation (3:1)
• Meter Source Selector Switch (Preamp/Gain Reduction/Compressor)
• Front Panel Power Switch (On/Off)
• Custom Altran and Cinemag Transformers

Universal Audio LA-610 MKII Classic Tube Recording Channel Specifications

• Microphone Input Impedance
  • Selectable, 500 Ohm or 2k Ohm
• Balanced Line Input Impedance
  • 20k Ohm
• Hi-Z Input Impedance
  • Selectable, 2.2M Ohm or 4 k Ohm
• Maximum Microphone Input Level
  • -8 dBu (2k input impedance and 15dB Pad in)
• Maximum Output Level
  • 80 dB
• Recommended Minimum Load
  • 600 Ohm
• Frequency Response
• 20 Hz to 20 kHz +0.5 dB
• Maximum Gain
  • 40 dB (line), +77dB (mic)
• Noise Floor
  • -72 dBu, 20 Hz to 20 kHz (line in, unity gain)
• Compressor Ratio
  • 3:1, soft knee, program dependent
• Limiter Ratio
  • Infinity: 1, soft knee, program dependent
• Attack Time
  • 10 ms, program dependent
• Release Time
  • Dual stage: 60 ms for 1st release, then 1 - 15 sec.
• 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 lbs.