Guitar effect pedal Universal Audio UAFX Ruby '63 Top Boost amplifier with analog circuitry and true bypass

The Universal Audio UAFX Ruby '63 Top Boost amplifier pedal is a compact analog guitar effect designed to reproduce the characteristic Top Boost tone of a 1960s amplifier. Built with analog circuitry and true bypass switching, the pedal provides vintage EQ and boost voicing in a pedalboard-friendly format. It offers hands-on control for shaping mid-20th-century clean and driven tones suitable for studio tracking and live performance.

Advantages

This pedal delivers authentic Top Boost amp voicing using analog signal paths and components that preserve tonal nuance and dynamics. True bypass switching maintains signal integrity when the effect is off, while compact construction allows straightforward integration into crowded pedalboards. The control layout provides intuitive adjustments for gain, tone and level so players can quickly dial in classic clean headroom or tasteful breakup.

Suitable for

• Electric guitarists seeking classic 1960s Top Boost clean and overdriven tones
• Studio recording where vintage amp character is required without using a full amplifier
• Live performers needing reliable, compact amp-style boost and EQ
• Painters of tone who combine pedal-driven amp emulation with effects chains

Key specifications

• Analog circuitry that reproduces vintage amplifier tonal characteristics
• True bypass switching to preserve bypassed signal fidelity
• Compact form factor suitable for standard pedalboards
• Dedicated controls for gain, tone and output level for hands-on shaping
• Designed for use with electric guitars and instrument-level signals

How to use

Connect the guitar to the pedal input and the pedal output to your amplifier or next device in the signal chain. Use an appropriate 9V DC power supply if required by the unit. Adjust the gain control to set the amount of boost or breakup, shape the mid and treble content with the tone control, and balance the effect level relative to your bypassed signal with the output control. Engage the footswitch to activate the effect; disengage for true bypass operation.

Usage recommendations

For best results, pair the Ruby '63 Top Boost with a clean or slightly overdriven amplifier channel to reproduce classic Top Boost headroom and breakup. Experiment with guitar pickup selection and position to find the most natural-sounding midrange presence. When using in a pedalboard chain, place the pedal before time-based effects for a more authentic amp-driven tone.