FX Engineering is a small boutique pedal builder based in Raleigh, North Carolina, founded and operated by designer Montez. The company is best known for the RAF Mirage Compressor, a proprietary (non-optical) design aimed at guitarists who dislike traditional compression but want sustain and clarity without added coloration, noise, or squashed attack. The Mirage is offered in several form factors, including the standard hand-wired version, the Pro model, the smaller Pico/Nano enclosure, and updated revisions such as the REV-10, which adds an attack trim pot for dialing in plucky, Nashville-style response alongside the original smoother compression.

The pedals are hand-built in North Carolina and have built a reputation in boutique circles for transparency and low noise floor, with frequency response often cited as nearly flat across the audible range. Distribution has historically run through Sound Pure in Durham, North Carolina, alongside Reverb and other boutique dealers. Country artist Keith Urban has been seen using the RAF Mirage on his pedalboard.

FX Engineering has 2 products cataloged on Equipboard, including Compressor Effects Pedals. Their gear is featured by 4 artists, with the strongest followings in Rock, Jazz, and Funk / Soul. Notable users include Keith Urban, Mark Lettieri, and Daniel Carson.