This item is still in the original box, opened for inspection, but never used. All original packaging and paperwork is included. Since I'm not an authorized dealer, I can only list the item as "mint" and not "brand new" per Reverb's guidelines. I purchased this from Sweetwater in 2018 for my pro studio that never got built. My loss is your gain! Here's your chance to own a world class professional 4-channel tone-blending mic preamp with compression at a discounted price.

Here's the manufacturers description:

4-710d Four-Channel Tone-Blending Mic Preamp w/ Dynamics

Classic tube and solid-state tones with 1176-style compression and professional A/D conversion.

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 mic 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
• Process signals via Send and Return jacks for each channel

Bring your mic collection to life with 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.

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.

Key Features:

• Four TEC Award-winning 710 Twin-Finity™ microphone/line preamps
• 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
• 1176-style compression circuit per preamp channel
• 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 (globally switchable for all channels)
• 1-year Limited Warranty