Reyes 303
Key Features
- Component-level model of a 1959 Harmony H303 single-ended Class A amplifier
- 12SQ7 triode preamp and 50L6 pentode output-stage modeling
- Circuit calibrated using voltage measurements from the developer's physical amplifier
- Level-dependent saturation that responds to how hard you drive the input
- Single knob controls the signal passing from the preamp to the power tube
- Works with a preceding gain or pedal plugin to push the modeled preamp harder
Description
Reyes 303 is a free tube amp and saturation plugin from Reyes Amplifonics, modeled on a 1959 Harmony H303. It keeps the hardware's one-knob approach, with a 12SQ7 triode preamp feeding a 50L6 pentode output stage instead of a large collection of interchangeable amps and effects.
The developer built the component-level model using voltage measurements from the physical amplifier. Its single-ended Class A circuit responds to the level you send into it, so the amount of saturation changes with the input rather than staying fixed.
To push the preamp harder, place a gain plugin or pedal emulation before Reyes 303 in your signal chain. The plugin's own knob controls the signal passing from the modeled preamp to the power tube, giving you another way to shape how the circuit is driven.
This is the developer's V1 model, which solves the circuit in stages. The separate paid TRIODE plugin uses a newer V2 model that solves the circuit as a single system and adds controls and effects, so Reyes 303 should not be mistaken for the same product with a different name.
Reyes 303 is available in VST3 and AU formats for Windows and macOS through the developer's product page. It suits players and producers who want to explore a compact vintage amp circuit through gain staging rather than build a full multi-effect rig.
Frequently Asked Questions
How do I get more saturation from Reyes 303?
The developer recommends placing a gain plugin or pedal emulation before Reyes 303 to boost the signal entering its modeled preamp. Its own knob then controls the level sent from that preamp to the power-tube stage.
What does the single knob control?
It pushes the signal from the modeled 12SQ7 preamp into the 50L6 power tube. Input gain before the plugin is a separate part of the workflow, so both the incoming level and the knob setting affect how you drive the circuit.
How is Reyes 303 different from TRIODE?
Reyes 303 uses the V1 model, which solves the circuit in stages, while the paid TRIODE uses a V2 model that solves the circuit as one system. The current TRIODE also adds features including an IR loader, reverb, tremolo, clean boost, and treble boost.
