Universal Audio GPM-RUBY Ruby ’63 Top Boost Amplifier – Mint, Open Box

Get the British Invasion Tones that Inspired Generations – the Universal Audio Ruby ’63 Top Boost Amplifier

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.

• 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

• 2 x 12 Speaker Models:
  • SILVER: Rare 15W Celestion Silver Bulldogs

  • BLUE: Original Celestion Blue Bulldogs

  • GREEN: Modern Celestion G12Hs

• 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

Deliver British Tube Amp Tones to 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.

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.*

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.

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.

SPECIFICATIONS

• Power requirements: Isolated 9VDC, center-negative, 400 mA minimum (sold separately)

• Inputs: 2 x ¼” TS (right input for stereo connections and 4-cable mode)

• Outputs: 2 x ¼” TS (right output for stereo connections and 4-cable mode)

• USB Type-C for updates via computer

• Height: 2.56” (6.5 cm)

• Width: 3.62” (9.2 cm)

• Depth: 5.55” (14.1 cm)

• Weight: 1.24 lbs (0.567 kg)

Manufacturer: Universal Audio
Model: GPM-RUBY
SKU: I709721-GA999251115-1-WHXX
UPC: 819937003332

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Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

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