Up for sale are (2) S&M Audio EQSM1 500-Series 4-Band Equalizer. Inspired by the legendary Trident 80B console EQ, it delivers that rich, musical analog tone with improved precision, tighter component tolerances, and lower noise. It's a fantastic, reliable workhorse for tracking and mixing.

Technical Specifications:

- Format: Single-slot 500-series module (electronically balanced)

- High Frequency (HF): Switchable shelving at 8 kHz or 12 kHz

- High-Mid Frequency (HMF): Continuously variable sweepable peak from 1 kHz to 15 kHz

- Low-Mid Frequency (LMF): Continuously variable sweepable peak from 100 Hz to 1.5 kHz

- Low Frequency (LF): Switchable shelving at 60 Hz or 120 Hz

- High-Pass Filter: Fixed first-order filter at 50 Hz

- Bypass: Hardware true bypass switch ("In")

- Current Draw: ~50 mA

This was an extremely limited run and so there isn't much on it anywhere.

Key Highlights & Hands-On Notes

Trident 80B Circuit DNA: “It is laid out exactly like the EQ section of a Trident 80B... I find the musicality of the 80B EQ to be enormously useful, especially while tracking.” — Kirt Shearer (Tape Op Magazine)

Improved Finesse Over Vintage Units: “The EQSM1 offers a bit more gentle and accurate approach. The width of the boost and cut is a bit narrower, which makes it more usable for cutting problem frequencies.” — Tape Op Magazine Solid Tracking EQ:

“A slight boost at about 1 kHz brought out the growl of a Fender Bassman amp very nicely. I never ran into a situation where I needed to reach for another EQ.” — Tape Op Review

Value & Build Quality:

“For the quality of components used, I’m surprised they’re not charging more.” — Kirt Shearer Sound Character: Preferred by reviewers over modern VCA/SSL-style channel EQs for its smooth, musical musicality during tracking.

Local pickup/drop off near Kitchener/Guelph, drop off in the Greater Toronto Area also available; and willing to ship insured at buyer’s expense anywhere in the world if required.

Check out my other 500-series listings!