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.

Now You Can:

• Track through meticulously designed UA tube preamp circuitry.
• Blend tube and solid-state textures for tons of flexibility.
• Harness classic 1176-style compression on each mic channel.
• Add 8 inputs to any Apollo interface via ADAT optical connection.

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, holding a bass guitar in place, or 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.

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 the 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-normalized).
• 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.

Special Note B-Stock:

• This item is considered "B-Stock."
• B-Stock items are new instruments that did not get an A+ in QC.
• B-Stock is the closest to a new condition. There are very small blemishes categorized as “an inch or less”. Many times, these items are like new.
• They usually have minor cosmetic blemishes; none of these issues will affect overall playability.