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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 UAD modeling expertise, the Ruby '63 effects pedal delivers choirboy cleans, complex overdrive, and classic vibrato.
Get the valve amp that powered the British Invasion, perfectly emulated in a stompbox

Stay inspired with rich Top Boost tones and tube-powered vibrato


Take ace studio amp tones anywhere, complete with legendary mic/speaker pairings and famous boost effects

Download artist tones, customize features, explore presets, and more with UAFX mobile app
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.
Lark Guitars Difference: Lark Guitars takes great pride in making sure your shipment will arrive timely, correctly and as hassle free as possible. With the massive shift to more remote ordering of guitars and instruments, this process can be exasperating at times. It is our goal to minimize any of these feelings, making your transaction from purchase to playing as joyfully possible. For more info regarding our shipping methods, please visit here.
International Shipping:
We ship all over the world, please contact us with any questions you may have or to receive a detailed shipping quote! More info here.
