Best FET compressors: A recording necessity

FET compressors are one of the most popular circuit topologies. Popularized by the Urei 1176, they are aggressive and have a very fast attack time. But they can clean up pretty well too. 

They also work well with a serial compression technique, often paired with something slower and more gentle like an optical compressor.

Let’s take a look at some of the best hardware FET compressors.

Best FET compressor overall: Universal Audio 1176LN

What do some of the best rock, pop, and rap albums of all time have in common? The 1176 FET compressor. First released in 1967, it became an instant hit. The time constants are fast, and no matter how soft or aggressive you want it to compress the signal it’s always a good choice.

Universal Audio’s version is built to the original unit’s specs with point-to-point handwiring and custom Class A output transformers. Ratio is selected through buttons with options for 4:1, 6:1, 12:1, or 20:1. And if you really want to drive it you can use the “Nuke” technique, where all ratio buttons are engaged.

Multiple metering options let you see what it’s doing from different gain levels, or you can defeat the VU altogether and simply use your ears. It’s very colorful, so much so that you can just run signal through it with no compression and it still makes tracks sound better.

Regardless of the source you’re using it on, it always adds to the signal. It works especially well when used in serial on vocals matched with something like a LA-2A, to fatten and add a little dirt to bass guitar, or to bring out the thunder of a good snare drum.

This is as close to the sound and build quality of the original rack mount hardware as it gets.

Best FET compressor over $1,000: Chandler Limited Germanium Compressor

A lot of FET compressors are just replications of the 1176. But some are something else entirely, and add unique features to improve on this type of compression circuit to make it more versatile for modern recording.

Comp Curve is the most unique control. It’s effectively a “character” parameter that lets you tailor it for the source signal instead of simply compressing it. A Clean/Dirty Comp toggle switch lets you add in 2nd and 3rd order harmonics that add a pleasant saturation when engaged.

Another control that sets this compressor apart from the pack is the Feedback control. The amount of gain introduced is based on it. This alters the amount of signal fed through the output back into the input. It also affects the tone.

Set fully counter-clockwise there is less overall volume and distortion, but more high end. Fully clockwise introduces more volume, harmonic distortion, and a bump in the low frequencies around 30Hz. 

If you’re looking to add the sound of a FET compressor to your rack and want something that’s not just another regurgitated 1176, Chandler Limited knocked it out of the park with the Germanium Compressor. 

It’s also available as a matched stereo pair.

Best FET compressor under $1,000: Black Lion Audio Bluey

We absolutely love the Bluey. Blue Stripe 1176 units fetch an astounding price on the used market, so who else but Black Lion Audio to revive it and make it affordable for studios of all sizes? 

First-class circuit components, Cinemag transformers, familiar 1176 control scheme, four ratio buttons that include the “Nuke” setting, and all the fast, aggressive compression people love about the 1176 design. You can even do parallel compression through the Blend knob.

It’s also available as a 500 series compressor. As far as FET compressors go, Bluey is up there with the best.

Best hybrid FET compressor: Black Lion Audio B172A

The B172A marries FET and optical circuits. This tandem is a match made in heaven, as these two types of compression circuits are often used in serial, especially on vocals. 

One does the heavy lifting and the other catches the peaks. Each circuit can be used separately as well, and a Dual Mono Link allows for easy signal routing to either circuit in whatever order you want.

Black Lion Audio never skips on components, and the T4BLA opto cell is one of the best in the world. Transformers are a huge part of the quality of a compressor’s sound and execution.

BLA selected a Cinemag input transformer on the optical side and a proprietary output transformer made in their Chicago facility on both sides.

The goal with the B172A is flexibility. A switch lets you instantly switch the order of the compressors, so you can find which is right for what you need in the moment.

There is stereo linking for each circuit too, so you can chain two units together.

Best budget FET compressor: Lindell Audio Lin76

Budget rack mount hardware is often construed with being low quality. That’s certainly true for some gear, but the Lin76 does not fall into that category.

This take on the 1176 features the familiar control setup, transformers made in the USA, and is a faithful take on this style of compression, all for under $300. 

Four ratio buttons let you dial in at 4,8,12, and 20:1 and the attack/release time constants are as fast as you need. It can also do British – or “Nuke” – mode with all ratio buttons engaged. An accurate analog VU meter offers different views over how it’s performing. And a meter calibration knob on the rear ensures metering accuracy.

When it comes to budget hardware, it’s always recommended to check out a plugin version as well. They’re about the same price point, and you might be able to find more features and value in software.

But that’s not the case with the Lin76. It doesn’t push any boundaries or offer anything new, but in terms of budget FET compressors this is the best.

FAQ

What is a FET compressor, and how does it work?

It’s a type of dynamic range compressor that uses transistors to control gain reduction. Unlike other designs like optical or VCA compressors, FET designs are known for fast attack times and aggressive, punchy sound. 

They work by detecting the incoming signal’s level and quickly reducing gain when it crosses a set threshold. It releases it just as fast. This makes them perfect for controlling sharp transients. FET compressors are a favorite for drums, vocals, guitars, and other sources where energy and presence are critical.

How does a FET compressor compare to an optical or VCA compressor?

FET compressors are typically faster and more aggressive than optical compressors. Optical designs are smoother and slower, which makes them better for subtle leveling. 

Compared to VCA compressors, which are clean and precise, FETs have more character and color. If you want transparent dynamic control, a VCA might be better. If you want color, saturation, and harmonics, a FET compressor is the way to go.

Why are FET compressors so popular for vocals and drums?

FET compressors have a unique sonic character that adds excitement and energy to a track. Vocals benefit from added subtle saturation and forward presence, which helps them sit on top of a mix without sounding overly squashed. 

Drums, especially snare and kick, gain extra punch and definition because the fast attack and release times shape transients without dulling them. The harmonic coloration that many classic FET designs introduce adds a warm, slightly gritty quality that many engineers find musically pleasing.