Universal Audio UAFX Ruby Amp Emulator Pedal

UAFX Ruby '63 Top Boost Amplifier

Stereo amp and cabinet emulation pedal with vibrato, room modeling, multiple speakers, cabinets, and boosts, live mode and four onboard presets, customization with the UAFX mobile app, and USB MIDI support.

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.

2x12 Speaker Models

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

Free Additional Speaker Cabinet Models

• 1x12 AC15 cab with Blue Bulldog
• 2x12 Matchless cab with Celestion G12Hs
• 2x12 Two-Rock cab with Celestion Golds

Expand your Sounds with MIDI

Using its rear panel USB-to-MIDI connection, Ruby '63 drops straight into any programmable MIDI rig, receiving preset changes and realtime control of boosts, EQ, and more.

Powerful App Control with Hardwired or Bluetooth Connection

The UAFX Control app gives you deep tone shaping for your Ruby '63. Customize, save, and manage presets, load artist tones, and set new footswitch modes — with up to four onboard presets plus Live Mode — all with a rock-solid Bluetooth connection.