Universal Audio 710 Twin-Finity Single Channel Tone-Blending Mic Preamplifier and DI Box, 20Hz-100kHz Frequency Response, 600 Ohms Output Impedance

SKU: UA710TFD MFR: 710TF
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Key Features

  • Blend tube & solid-state tones on your mic preamps for unique sound textures, perfect for vocals.
  • Achieve pristine sound with this low noise mic preamp, ideal for recording delicate instruments.
  • Shape your tone with versatile EQ options on this preamp, enhancing your mixes with clarity.
  • Built tough, the Universal Audio 710 preamp offers lasting reliability for studio & stage use.
  • Connect mics, instruments, & line-level sources easily with versatile preamp connectivity options.
  • Harness a wide gain range for any source, from soft vocals to loud drums, using this mic preamp.
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Special Order?Estimated to Ship: 08/22/2025
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Universal Audio 710 Twin-Finity Specifications

  • Microphone Input Impedance

    2kOhms

  • Balanced Line Input Impedance

    10kOhms

  • Hi-Z Input Impedance

    2.2M Ohms

  • Internal Output Impedance

    600 Ohms

  • Overall Gain Range

    -Infinity to 70dBu

  • Gain Pot Range

    Mic: +10 to +60 dBu
    Line: - 10 to +40 dBu
    Hi-Z: +10 to +40 dBu

  • Maximum Mic Input Level Gain atmin

    SS 1% THD: +18 dBu
    Tube 1% THD: - 7 dBu (+8dBu with pad)

  • Maximum Line Input Level Gain atmin

    SS 1% THD: +30 dBu
    Tube 1% THD: + 8 dBu

  • Maximum Hi-Z Input Level Gain atmin

    SS 1% THD: +18 dBu
    Tube 1% THD: + 8 dBu

  • Clipping Level (Tube and Solid-State)

    same as Max In

  • Maximum Output Level into 600 Ohms

    +18 dBu into 600 Ohms, +28 dBu into 100kOhms

  • Frequency Response (Mic/Line/Hi-Z)

    20Hz-100kHz +/- 0.2 dBu

  • Min THD+Noise at +4dBU

    0.1% tube, 0.005% solid-state

  • External Connections

    XLR Line in/out, XLR Mic in, 1/4" (Hi-Z) in

  • Low Cut Filter

    75Hz, Bessel

  • Pad

    -15dB

  • Meter

    Drive (THD) and Output (dB)

  • Tube Complement

    12AX7

  • Power Requirements

    100-240 V, auto-sensing power supply

  • Maximum Power Consumption

    160mA at 120V AC, 20W

  • Power Connector

    Detachable IEC power cable

  • Dimensions (W x H x D)

    8.45 x 3.5 x 10.25" (21.46 x 8.89 x 26.03cm)

  • Weight

    5.25lbs (2.38kg)

  • UPC Code

    819937001208

About Universal Audio 710 Twin-Finity

The Universal Audio 710 Twin-Finity Single Channel Tone-Blending Mic Preamplifier and DI Box is a radically new 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 is the only one that offers the best of both worlds as well as everything in-between all in one box.

The key to its sonic flexibility lies in its innovative circuit design, featuring a solid-state Trans impedance 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 Trans impedance stage is controlled via the "Blend Knob" labeled "infinity". 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 own signature sound. 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.

Universal Audio 710 Twin-Finity Features

  • 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
  • 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

Product Documents

User Manual

Key Features

  • Blend tube & solid-state tones on your mic preamps for unique sound textures, perfect for vocals.
  • Achieve pristine sound with this low noise mic preamp, ideal for recording delicate instruments.
  • Shape your tone with versatile EQ options on this preamp, enhancing your mixes with clarity.
  • Built tough, the Universal Audio 710 preamp offers lasting reliability for studio & stage use.
  • Connect mics, instruments, & line-level sources easily with versatile preamp connectivity options.
  • Harness a wide gain range for any source, from soft vocals to loud drums, using this mic preamp.

What's in the box:

  • Universal Audio 710 Twin-Finity Single Channel Tone-Blending Mic Preamplifier and DI Box
  • Rack Mounting Hardware
  • 710 Operating Instructions
  • IEC Power Cable
  • Registration Card
  • Universal Audio 1 Year Parts and Labor Limited Warranty