Universal Audio UA-710TF Twin-Finity Mic Preamplifier

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.

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.

Key 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
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

Specifications

Inputs
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

Impedance
Mic Input Impedance - 2K ohms
Line Input Impedance - 10K ohms
Hi-Z Input Impedance - 2.2M ohms
Internal Output Impedance - 600 ohms

Gain/Levels
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

Frequency Response
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