Universal Audio UAFX Ruby ’63 Top Boost Amplifier

Get the British Invasion tones that inspired generations.

The UAFX Ruby ’63 Top Boost Amplifier pedal gives you the quintessential British valve amp beloved by artists and producers for over 60 years, from Queen to U2 to Radiohead.

Built on powerful dual-engine processing and world-class UAD modeling, Ruby ’63 delivers choirboy cleans, complex overdrive, and classic vibrato.

Deliver 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 UK 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.* 

Take Your Tone to the Tailor 

With built-in mic and speaker pairings from UA’s award-winning OX Amp Top Box, Ruby ’63 lets you tailor your classic Brit amp tones like you took them to Savile Row.

2×12 Speaker Models

• SILVER: Rare 15W Celestion Silver Bulldogs
• BLUE: Original Celestion Blue Bulldogs
• GREEN: Modern Celestion G12Hs 

Free Additional Speaker Cabinet Models

(Get with the UAFX Control app) 

• 1×12 AC15 cab with Blue Bulldog 
• 2×12 Matchless cab with Celestion G12Hs 
• 2×12 Two-Rock cab with Celestion Golds 

* Product names used herein are trademarks of their respective owners, which are in no way affiliated with Universal Audio Inc. These name(s) are used solely to identify products studied in the creation of the sound models found in Ruby ’63 Top Boost Amplifier. 

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.