Short Description:

Digital amp modeling pedal capturing classic British 2x12 tube tones featuring authentic speaker cabinet simulations, built-in boosts, and Bluetooth app control.

What We Think:

Condition: Used, Excellent

Delivering classic tube-amp emulation in a compact stompbox format, the UA '63 Top Boost Amplifier Pedal features dual 1/4" TS inputs and outputs supporting mono, stereo, and 4-cable mode operations. Weighing 1.24 lbs (0.567 kg) with dimensions of 2.56" x 3.62" x 5.55", it utilizes 24-bit, 44.1 kHz A/D and D/A conversion offering a 20 Hz to 20 kHz frequency response (±3 dB), a 115 dB dynamic range, and a -115 dB signal-to-noise ratio. Audio specs include an input impedance of 500 Kilohms (mono) / 1 Megohm (stereo) with a 12.2 dBu maximum input level, alongside a 500 Ohm output impedance with a 12.1 dBu maximum output level. Equipped with USB Type-C for registration and firmware updates and Bluetooth v5 connectivity (2.400 GHz – 2.4835 GHz range, +4.35 dBm max output power), this pedal requires an isolated 9VDC center-negative power supply delivering a minimum of 400mA (sold separately).

Manufacturer Description:

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

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

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

Download artist tones, customize features, explore presets, and more with UAFX mobile app

Specifications:

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

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

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

Input impedance: 500 Kilohms (Mono In), 1 Megohms (Stereo In)

Output impedance: 500 Ohms

Maximum input level: 12.2 dBu

Maximum output level: 12.1 dBu

Dynamic Range: 115 dB (A-weighted)

Signal to noise ratio: -115 dB (A-weighted)

Frequency response: 20 Hz to 20 kHz, ±3 dB

A/D and D/A conversion: 24-bit, 44.1 kHz

USB Type-C: For registration and firmware updates via computer

Wireless technology: Bluetooth v5

Transmitted Frequency Range: 2.400 GHz – 2.4835 GHz

Maximum Output Power: +4.35 dBm

Dimensions (with knobs and protrusions): 

Height: 2.56 inches, 6.5 cm

Width: 3.62 inches, 9.2 cm

Depth: 5.55 inches, 14.1 cm

Weight (unboxed): 1.24 lbs, 0.567 kg