Product Overview

The Definitive Sound of the 1960s British Rock Revolution

No guitar amplifier line evokes the soaring brilliance, glass-like high-end, and chimey midrange of classic British rock quite like the Vox AC30. From The Beatles and The Rolling Stones to Brian May and U2's The Edge, the Top Boost circuit is the backbone of some of the most famous guitar tracks ever recorded. The Universal Audio UAFX Ruby '63 Top Boost Amplifier cals that exact historical tube architecture down into a compact, stereo stompbox.

Instead of deploying generic EQ snapshots or flat digital filters, the Ruby '63 utilizes Universal Audio’s proprietary dual-processor architecture to model the actual physical interaction of the AC30’s multi-tube power section, custom transformer sag, and interactive tone-cut matrix. When you dig in with your pick, the pedal responds instantly with the compression, grit, and harmonic swell of a real physical tube amp running hot.

Product Description

Three Historic Channels and Boutique Preamp Booster Circuits:

The Ruby '63 provides access to the complete vintage AC30 circuit array via three classic channel selections, easily navigable using the onboard toggle switches:

• Brilliant: Models the iconic 1963 Top Boost channel configuration, adding an extra 12AX7 tube stage to deliver the pristine, glassy high-end bite and signature harmonic saturation that cuts perfectly through any mix.

• Normal: Offers a warmer, darker, and punchier tone profile based on the amplifier's standard channel inputs. It provides an excellent, transparent canvas for stacking external fuzz or overdrive pedals.

• Vibrato: Recreates the hypnotic, watery amplitude modulation and pitch-shifting vibrato circuit of the original vintage units, complete with speed variations adjustable on the fly.

To push these channels into singing lead tones, the Ruby '63 includes integrated models of classic studio-grade booster circuits:

• Stock: Retains the unboosted, pure input circuit topology of the amplifier.

• Rangemaster: Models a vintage Dallas Rangemaster germanium treble booster, pushing the power amp into a thick, mid-forward classic rock roar.

• EP-III: Emulates the solid-state preamp stage of a vintage early-'70s tape echo unit, providing a highly musical, warm clean boost with subtle compression.

OX Amp Top Box Cabinet Modeling and Room Ambience:

The Ruby '63 features legendary speaker cabinet and microphone pairings pulled directly from UA’s critically acclaimed OX Amp Top Box. By calculating the physical air movement, phase alignment, and early reflections of world-class recording tracking spaces, the pedal avoids the synthetic tone profile of traditional direct boxes. Whether you choose an original 2x12 open-back combo with vintage Celestion Silver Bells or massive 4x12 extension stacks, you get mix-ready studio tones instantly.

Stereo Configuration and Seamless UAFX App Integration:

Built to adapt to professional live stage and tracking studio demands, the Ruby '63 offers full stereo input and output configurations. It fully supports the 4-Cable Method, allowing you to bypass your physical guitar amplifier's integrated preamp section to route the pure, vintage 1963 Top Boost circuitry directly into your amp's power section.

Equipped with a built-in Bluetooth engine, the Ruby '63 pairs wirelessly with the UAFX mobile application (iOS/Android). The app opens up deep control over secondary circuit values, lets you select between True or Buffered bypass routing, allows you to customize the assignment of the dual footswitches, and grants instant access to downloadable artist presets created by world-renowned guitarists.

Key Features

• 1963 AC30 TOP BOOST EMULATION: Full component-level recreation of the legendary British multi-tube combo amp celebrated for its glassy chime and aggressive edge.

• THREE HISTORICAL CHANNEL MODES: Switch between Brilliant (Top Boost), Normal, and Vibrato channels for varied frequency textures.

• INTEGRATED GERMANIUM & TAPE BOOSTS: Built-in models of the iconic Dallas Rangemaster treble booster and EP-III tape echo preamp.

• TOUCH-SENSITIVE TUBE BEHAVIOR: True modeling of power section tube sag, transformer saturation, and physical bias compression.

• 6 PREMIUM SPEAKER CABINETS: 6 curated cabinet and studio microphone setups capture the realistic acoustic width of an engineered live room.

• TRUE STEREO IMAGING: Full stereo input and output ports for expansive spatial ambient widths or multi-amp live routing.

• 4-CABLE METHOD COMPATIBILITY: Integrates seamlessly into your physical guitar amplifier's effects loop to act as an independent preamp replacement.

• BLUETOOTH UAFX APP LINK: Wirelessly tweak hidden internal settings, manage foot-switch configurations, and download custom artist presets via smartphone.

Technical Specifications

What’s Included in the Box

• 1 x Universal Audio UAFX Ruby '63 Top Boost Amplifier Effects Stompbox

• 1 x Official Universal Audio Quick Start Setup Guide & Control Layout Chart

• 1 x Factory Serial Registration Card & Official Universal Audio Hardware Warranty Card