By merging the best of UA’s classic analog design with smart modern features and workflow enhancements, the 4-710d is the most flexible microphone preamp in the UA lineup.

Featuring four high-end mic/line preamps with a unique tube/solid-state tone blending circuit, as well as classic 1176-style compression on each mic channel, the 4-710d also offers tons of digital I/O to expand your setup.

A Legendary Compression Circuit

Each of the 4-710d’s four channels features true-bypass 1176-style compression, including specially tuned "fast" and "slow" settings. This enables quick, on-the-fly tweaking for fattening up a vocal, hold a bass guitar in place, or for adding sizzle and texture to synths and horns.

Add Inputs and Professional A/D Conversion

With eight analog inputs, the 4-710d is perfect for expanding your studio. Digitized via ultra high-quality 24-bit A/D converters at selectable sample rates up to 192 kHz, the 4-710d easily connects to most interfaces with its dual ADAT optical or AES/EBU DB-25 connectors.

Bring your Mic Collection to Life with a Wide Range of UA Preamp Tones

At the core of the 4-710d are four channels of tone-blending “Twin-Finity” mic preamps. Each channel offers 100% tube and 100% solid-state signal path, as well as the ability to continuously blend between the two circuits. This gives you tons of textures — from creamy to crunchy — and lets you dial in the perfect amount of tube grit or solid-state sheen.

Features

Preamplifiers

Four TEC Award-winning 710 Twin-Finity™ microphone/line preamps, each featuring:
Dual-path 285-volt Class-A tube and transimpedance solid-state preamps
Phase-aligned tone-blending of tube and solid state circuits, creamy to crunchy
Newly designed 1176-style compression circuit per preamp channel
JFET Direct Input with 2.2MΩ ultra Hi-Z impedance w/auto input override
Large backlit VU meters for flexible metering of input drive, gain level, and gain reduction
Balanced send/return inserts (half-normalled)
48V phantom power
75 Hz low cut filter
Polarity switch
Monolithic balanced output stage

Analog-to-Digital Conversion

Eight channels of high quality 24-bit A/D conversion:
Selectable sample rates up to 192 kHz
Digital output via dual ADAT optical and AES/EBU DB-25 connectors
8-channel soft limiter (switchable for all channels)
Ultra-low jitter clock subsystem
LED metering array with clip/hold indicators
75Ω BNC work clock I/O
Digital outputs anti-pop protection on power-up

Other

Universal voltage internal power supply
Heavy-duty metal construction, two-space rack unit
One year warranty including parts and labor