Undertone Audio
Built by people who make records.
Hand-built recording equipment designed by producer Eric Valentine. Home of the UnFairchild 670M II, a painstaking recreation of the classic Fairchild 670 circuit, built to work every single day.
As reviewed in
01 · The Flagship
UnFairchild 670M II
The legendary Fairchild 670, rebuilt for the records you make now.
A modern recreation of the Fairchild 670 variable-mu tube compressor, expanded with feed-forward compression, M/S operation, sidechain access, and ten time constants.
- 6 preset + 4 variable time constants
- Feedback and feed-forward compression
- Full M/S operation with independent control
"Unfairchild is by far the best compressor I own. Worth its weight in gold. Amazing!!"
02 · Hands On
Hands On
This is what a vari-mu does.
Turn the knob. The quiet stays. The peaks tuck in. The whole thing gets denser. Now imagine twenty tubes doing it to your mix bus.
Compression
03 · The Lineup
Every piece earns its rack space.
UnFairchild Expansion
UNFa-1
The expansion that takes the UnFairchild even further.
$2,495
Preamp
MPDI-4
Four channels of console-grade mic pre and DI in one rack space.
$3,795
Summing
Pyra-Sum
Passive analog summing that scales with your hybrid rig.
$1,595
EQ
UTEQ500
The UTA console EQ, sized for your 500 series rack.
$1,195
Accessory
GB Tracker
Record the instrument now. Decide the amp later.
$895
Accessory
Satellite Re-Amp
More amps, same take.
$295
Accessory
Vari-Cap
The guitar cable with a tone control.
$119.95
04 · In the Box
The same circuits, native in your DAW.
Both UTA plug-ins are $149 with a 14-day free trial and a perpetual license.
14-day free trial
UTA-D UnFairchild 670M mkII
A painstaking native recreation of the UnFairchild 670M II, built with MIXLAND and Eric Valentine. Adds output level, wet/dry mix, and an overall THD control.
$14914-day free trial
MPEQ-1 Super-Parametric Saturation EQ
The UTA console EQ as a plug-in, with per-band saturation stages, variable shape filters, Vari-Phase, and a high-resolution RTA.
$14905 · In the Field
The people behind the records agree.
"Unfairchild is by far the best compressor I own. Worth its weight in gold. Amazing!!"
"The 670M II gives me a broader sonic palette and more flexibility than the vintage units."
"I wanted a Fairchild for years. Everything I wanted from a Fairchild and more."
06 · Making Records
Watch Eric Valentine make records with this gear.
Deep dives into real sessions, real mixes, and the design thinking behind every UTA product, on the Making Records with Eric Valentine channel.
Watch on YouTubeMaking Records with Eric Valentine
Song deconstructions, mixing breakdowns, and gear design from the producer behind records for Queens of the Stone Age, Third Eye Blind, Smash Mouth, and more.
Hear it in your own session
The UnFairchild plug-in is $149 with a 14-day free trial. The hardware is at a dealer near you.