Echelon AudioEchelon Audio
EA-3A interfaceEA-3A · v1.2.3 · VST3 · AU · AAX

Dynamics · one of the 34

EA-3A

The opto with an attitude problem.

Solid-state opto compression — faster cell, steeper ratio, mid-forward bite. Guitars, drum rooms and vocals that need to cut.

Own it

$39perpetual · free updates
Start 7-Day Trial · Includes EA-3A

Trial covers all 34 units, then $17.99/mo. Buy Now goes straight to checkout.

macOS (Universal) + Windows · iLok · New plugins drop Sept 18

Not today? so it’s easy to find again.

Hear it · one instance · level-matched

Program
Gospel — level-matched, one instance
Spectrum · EA-3A held
Processing
Solid-state opto — faster, brighter · Sustained notes stay even · Bites a little when pushed
Δ Top end
-1.4 dB
Δ Crest
-1.4 dB

Measured on this demo · method

Δ loudness+0.1 dBΔ crest-1.4 dBΔ sibilance-1.4 dBTrue peak-4.4 dB

Bench receipts · what shipped had to prove

  • 13/13 battery checks green · auval PASS
  • Measured +1.07 dB @ 2 kHz presence delta vs EA-2A — a different circuit, proven, not a reskin
  • Aliasing ≤ −150 dBFS · bypass null

Why it exists

The smooth opto is perfect until the source needs edge — then smooth reads as buried, and you reach for EQ to fix what compression flattened.

EA-3A keeps the opto musicality but moves everything forward: ~1.5 ms attack, a ratio that steepens toward limit, presence voiced into the transformer stage, and odd-order grit when you slam it. Same two-knob workflow as EA-2A — a completely different animal.

In the session

  • Put electric guitars in your face without an EQ pass.
  • Tighten a drum room while the presence region stays lit.
  • Slam it for grit that reads as attitude, not distortion.
  • A/B against EA-2A — same design, opposite personality.

Under the hood

Fast opto cell — ~1.5 ms attack
Steeper ratio, into limit when slammed
Mid-forward presence voicing
Grittier odd-order color under drive

System requirements

Versionv1.2.3
FormatsVST3 · AU · AAX
macOSmacOS 11+ · Apple Silicon + Intel (Universal)
WindowsWindows 10/11 · 64-bit · VST3 + AAX
LicensingiLok · machine, cloud or USB
DeliveryEchelon Audio Hub

Buyer's guide

Which compressor?

Seven ways to control dynamics in the rack. They overlap on purpose — the difference is the job.

GRIPOne compressor for anything — seven styles, set it by ear. The flagship.$149
EA-76Fast FET punch. Rap vocals, snares, anything that needs grabbing.$39
EA-2ASlow tube opto leveling. The vocal that just sits, after the peaks are handled.$39
EA-3AThe opto with attitude — mid-forward, guitars, drums, aggressive vocals.this unit
EA-60Hard-knee VCA slam. Drum bus, three knobs, done.$39
GLUEConsole-style bus glue. The last 2 dB that makes it one record.$99
POCKETOne fader, finished vocal — gate, compression, color and makeup together.$39