Universal Audio | Ruby '63 Top Boost Amplifier Pedal

Experience British Tube Amp Tones, Stage and Studio

Whether it's replacing your amp rig and going direct to front-of-house on stage, or recording tracks into your DAW — Ruby '63 gives you the inspiring, album‑ready tones of an expertly miked "golden unit" vintage tube combo, within seconds.

Explore Normal, Brilliant, and Vibrato Channels

Ruby '63 is the only stompbox that gives you the Normal, Brilliant, and Vibrato channels from the original amp — so you can fly to Ireland, London, or Liverpool with the flip of a switch. From mellow to chime to grind, it's all here.

Push the Limit with Classic Boosts

Ruby '63 packs classic boosts, right onboard. Namely, the legendary '60s Dallas Rangemaster germanium treble booster and the preamp of a '70s Maestro EP-3 tape delay.* Just flip the Boost switch for searing layered tones that put IR-based amp modelers in the bin.

Customize your Sound with the UAFX App

Ruby '63 really gets cracking with the UAFX Control mobile app. Download custom artist tones, recall and archive your presets, and dive deeper into the amp that ignited the British Invasion.

Features

Powerful UAFX dual-engine delivers the most authentic '60s British tube combo sound ever placed into a stompbox

Includes the world's best speaker cabinet, mic, and room tones derived from the award-winning OX Amp Top Box

Features "hot rod" treble booster, preamp boost, and speaker swaps, plus free additional downloadable speaker cabinets and mics upon registration

Bypass cabinet/mic emulations and use in front of your amp for added tonal flavor and overdrive sounds

UAFX mobile app lets you customize footswitches, recall and archive your presets, unlock additional features, download artist presets, and more


Timeless UA design and craftsmanship, built to last decades