Symetrix 544 Quad Noise Gate & Expander – Punchy Vintage Studio Workhorse

Up for sale is a classic Symetrix 544 Quad Expander / Noise Gate.

If you’re looking to tighten up live drum tracks, control room bleed, sculpt synth tails, or add aggressive sidechain pumping to your mixes, this vintage 4-channel workhorse delivers fast, musical analog response that software plugins just can't quite replicate.

Key Features & Highlights:

• 4 Independent Channels: Run four mono sources or set up two stereo pairs.
• Dual Functionality: Switchable between Noise Gate and Expander modes per channel for everything from subtle downward expansion to hard gating.
• Sidechain / Key Inputs: Dedicated rear-panel key inputs for external sidechain control (great for triggering gates via a kick drum or rhythmic pulse).
• Flexible Controls: Independent Attack, Release, Threshold, and Range/Ratio knobs per channel, paired with fast multi-LED attenuation metering.
• Built Like a Tank: Solid USA-built rack gear from a legendary audio brand.

Condition Note:

This unit shows typical studio wear from years of rack mounting (some scratches, scuffs, and rack rash on the chassis/faceplate—please check the photos closely). Cosmetics aside, the unit powers up and functions great. All controls feel smooth, switches engage properly, LEDs light up, and all 4 channels pass clean audio and gate accurately.

Ships safely packed, fully insured, and ready to drop right into your rack!