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Microphone Input Impedance
Selectable, 500Ω or 2kΩ

Balanced Line Input Impedance
13.8 kΩ

Hi-Z Input Impedance  
Selectable between 2.2 MΩ or 47 kΩ

Maximum Microphone Input Level

Maximum Output Level

Internal Output Impedance
60 ohms

Recommended Minimum Load
600 ohms

Frequency Response
20Hz to 20kHz ±1 dB

Max Gain
61 dB

Signal to Noise Ratio
Greater than 82 dB

Tube Complement
(1) 12AX7A and (1) 12AT7 per channel

Power Requirements
115/230 volts

Power Consumption
30 watts

12.25 lbs.

19"W x 3.5"H x 12.25"D
(19" Rackmount chassis, 2U)

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Universal Audio 2-610S Dual-Channel Tube Mic/Inst Pre-EQ Silverface

18.30 LBS
Usually ships within 24 hours
Calculated at checkout

Product Description

All-Tube Dual Channel Preamplifier — Based on the Legendary UA 610 Modular Console. 

The legendary, Bill Putnam Sr. designed, UA 610 modular console is particularly well noted for its preamplifier, and has left its imprint on countless classic recordings from Frank Sinatra and Van Halen, to The Beach Boys’Pet Sounds. The 2-610 builds on this foundation by adding enhanced, user-requested features and build quality with a new cosmetic treatment. The result is a classic dual-channel tube preamplifier with all of the character of its vintage predecessor that meets and exceeds the requirements of the modern studio. Whether running pure analog or enhancing a digital audio workstation, the 2-610 brings classic tube character to any recording project.

At our users' requests, the 2-610 has the extended top end shared by its cousins, plus a -15 dB pad. In addition, the 2-610 has improved stability in the feedback design of the shelf filters as well as an improved power supply. Our expertise in analog design translates into a classic tube preamplifier with all of the character of its vintage predecessor.


  • All-tube dual channel preamplifier derived from legendary Bill Putnam-designed 610 modular console
  • Variable impedance Input, Gain, and Output levels
  • High and Low shelving EQ
  • Mic, balanced line and Hi-Z inputs
  • Custom wound double sized alloy transformers
  • Front panel -15 dB Pad switch
  • Improved EQ circuit and more “open” sonics
  • Ultra quiet operation
  • Updated “silverface” cosmetics; enhanced build quality
  • Hand-built in USA; backed by 1-year limited warranty