Universal Audio 710 Twin-Finity Single-Channel Mic Pre
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  • Regular price $999.00

Universal Audio 710 Twin-Finity Single-Channel Mic Pre

Get tube and solid-state sonics and everything in-between with this unique mic pre/DI. The award-winning 710 Twin-Finity™ is a radical UA mic preamp design that combines both the classic retro warmth of tubes with the transient bite of solid-state, all in a 2U, half-rack unit. The 710 was created specifically to add the tonal versatility and sonic inspiration missing from generic audio interface preamps. 
Tone blending is continually variable between 100% tube and 100% solid-state, offering a practically infinite range of unique preamp tones, plus the ability to easily dial-in your own signature sound. There are lots of sensibly priced solid-state and tube preamplifiers out there, but the 710 Twin-Finity is the only one that offers the best of both worlds — as well as everything in-between — all in one box, and within reach of any serious project studio’s budget. Includes a 19" rack-kit for mounting one or two units. 

  • Harness the distinct sonic properties of tubes and solid-state in one unique preamp/DI 
  • Blend between tube and solid-state sounds for myriad textures and tones 
  • Unlock the potential of your mic locker with a powerfully versatile preamp 
  • Easily track guitar, bass, or keyboards with the front panel 1/4“ Hi-Z instrument input 

The Ultimate in Mic Pre Flexibility. The key to the 710 Twin-Finity’s sonic flexibility lies in its innovative circuit design, featuring a solid-state transimpedance input amp simultaneously driving separate, phase-aligned tube and solid-state gain stages, which are then summed to a single output. The mix between the 310 volt single-ended class-A triode tube stage and solid-state transimpedance stage is controlled via the "Blend Knob" labeled "∞". Blending is continually variable between 100% tube and 100% solid-state offering a practically infinite range of unique pre-amp tones and the ability to easily dial-in your own signature sound. 

Drive for Days. Like all our other preamp designs, the 710 features dual gain-stage controls (Gain/Level) which can radically vary the amount of coloration and distortion by allowing you to crank up the input gain like a guitar amp. The VU meter features a unique "Drive" mode allowing you to see how hard you are driving the input stage. 


  • Twin-Finity™ Tone-Blending Mic/Line Preamp & Hi-Z Instrument DI 
  • Dual-Path 310 volt Class-A Tube and Transimpedance Solid State Preamp 
  • Phase-Aligned "Tone-Blending" of Tube and Solid State 
  • Dual Gain Stages: Wire with Gain to Creamy to Crunchy 
  • Discrete JFET DI with 2.2M ohm Ultra Hi-Z impedance 
  • Monolithic Balanced Output Stage 
  • 70dB+ of gain, +48V Phantom, Pad(-15dB), Phase Invert, and Low Cut Filter(75Hz) 
  • Output and "Drive" backlit VU metering 
  • Portable, Rack-Mountable design for Studio, Desktop or Stage 
  • 19” Rack Kit Included 
  • Front Panel Hi-Z Input (switched from Mic/Line automatically via Jack Detect) 
  • Rear Panel XLR Mic Input, XLR Line Input and XLR Line Output 
  • Universal Internal Power Supply 
  • Heavy-Duty Metal Construction 



  • Microphone (Female XLR) 
  • Balanced Line (Female XLR) 
  • Unbalanced Instrument (1/4" jack) (D.I.) 

Outputs: Balanced Line (Male XLR) 
Tube Complement: 12ax7 
Pad: -15dB 
High Pass Filter: 75Hz 
Maximum Power Consumption: 160mA @120VAC, 20W 
Power Requirements: 100-240VAC 
Dimensions: 8.45W x 3.5H x 10.25D 
Weight: 5.25 lb. 
Mic Input Impedance: 2K ohms 
Line Input Impedance: 10K ohms 
Hi-Z Input Impedance: 2.2M ohms 
Internal Output Impedance: 600 ohms 
Gain Range for Unit: -Infinity to 70dBu 
Mic Range Gain Pot: 10 ~ 60 dBu 
Line Range Gain Pot: -10 ~ 40 dBu 
Hi-Z Range Gain Pot: -10 ~ 40 dBu 
Mic Frequency Response: 20Hz to 100kHz +/- 0.2 dBu 
Line Frequency Response: 20Hz to 100kHz +/- 0.2 dBu 
Hi-Z Frequency Response: 20Hz to 100kHz +/- 0.2 dBu 
Distortion: Min THD+Noise @ +4dBU; 0.1% tube 0.005% solid-state