Universal Audio 710 Twin-Finity Microphone Preamplifier

- Inputs: Microphone (Female XLR), Balanced: Line (Female XLR), Unbalanced: Instrument (1/4 inch jack) (D.I.)
- Outputs: Balanced Line (Male XLR)
- Type: Tube & Solid-State Phase-Aligned Tone-Blending Mic Pre & DI
- Tube Complement: 12AX7
- Pad: -15dB
- High Pass Filter: 75Hz
- Maximum Power Consumption: 160mA @120VAC 20W
- Power Requirements: 100-240VAC
- Dimensions (WxHxD): 8.45 x 3.5 x 10.25 in.
- 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
- Maximum Mic Input Level Gain @min SS: +18 dBu
- Maximum Mic Input Level Gain @min Tube 1% THD: -7 dBu +8 dBu w/pad
- Maximum Line Input Level Gain @ Min SS: +30
- Maximum Line Input Level Gain @ Min Tube 1% THD:+8 dBu
- Maximum Hi-Z Input Level Gain Min SS: +18
- Maximum Hi-Z Input Level Gain Min Tube 1% THD: +8 dBu
- Maximum Output Level into 600 ohms: +18 dBu
- Maximum Output Level into 100k ohms: +28 dBu
- Tube Clipping Level: Same as Max In
- Solid-State Clipping Level: Same as Max In 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
- Min THD+Noise @ +4dBU: 0.1% tube 0.005% solid-state
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 9.5 lbs
Shipping Dimensions: 15 x 12 x 6 in
Manufacturer Part Number (MPN): 710TF-D
If you have additional warranty questions, please contact the manufacturer at 831-440-1176

Universal Audio 710 Twin-Finity Mic Pre

The 710 Twin-Finity is a radically UA pre-amp design which uniquely combines both the classic retro warmth of UA tube design and the transient bite of solid-state in a 2U, half-rack, all-metal chassis. The 710 was created specifically to add the tonal versatility and sonic inspiration missing from generic audio interface preamps.


- Twin-Finity(TM) 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

The key to its 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.

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.

Versatility makes the 710 the perfect preamp partner for any mic collection. Plus, the discrete JFET DI input circuit can also easily handle any electric instrument. Guitar and bass players will especially appreciate the 710s ability to bring out the best of both active and passive pickups. The 710 Twin-Finity is designed and built at UA headquarters in California, and includes a 19" rack-kit for mounting one or two units.
(26 ratings)
Submitted January 8, 2016 by nathan w in jonesboro, AR
"i love it"
Verified Customer zZounds has verified that this reviewer made a purchase from us.
even though i run this into a focusrite 2i2, the Ua-710 has made a HUGE difference in sound compared to that interfaces stock preamps.....the sound i hear thru my headphones while tracking has so much more body and clarity...it's actually inspirational. I mic'd up my acoustic with an sm-57 into this preamp, and it gave my acoustic so much more warmth and body... when i listen to the track i recorded with the 57 on my car stereo, the warm bass frequencies of my mahogany bodied acoustic really kind jump out of my speakers...
Musical Background:
been playing 28 years now.. mostly at home, some cover band experience
Musical Style:
rock, country, blues, reggae... anything that features a lot of guitar
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