The Universal Audio Uafx Ruby '63 Top Boost Amplifier is a Universal Audio boost pedal, currently around $399. Close alternatives include the Tech 21 SansAmp Oxford and the Lovepedal DOV Death Of Vox Handwired. It pairs well with the Swart Space Tone Atomic Jr. Two-Tone and the Divided by 13 JRT 9/15.
Universal Audio Uafx Ruby '63 Top Boost Amplifier
Universal Audio · pedal
The Universal Audio UAFX Ruby '63 Top Boost Amplifier is a Vox AC30 Top Boost amp emulation from Universal Audio (Santa Cruz, California), delivering a DSP-modeled recreation of the 1963 Vox AC30 Top Boost amplifier for the chiming, jangly British clean and light breakup tone used by The Beatles, Brian May, and countless classic British Invasion players. The Ruby '63 Top Boost Amplifier uses Universal Audio DSP-powered analog-modeling to deliver studio-quality vox ac30 top boost amp emulation in a compact pedalboard format.
What stands out
“The Universal Audio UAFX Ruby '63 Top Boost Amplifier is a Vox AC30 Top Boost amp emulation from Universal Audio (Santa Cruz, California), delivering a DSP-modeled recreation of the 1963 Vox AC30 Top Boost amplifier for the chiming, jangly …”
— from the listing
“jangly british clean and light breakup tone used by the beatles”
— from the listing
“The Ruby '63 Top Boost Amplifier uses Universal Audio DSP-powered analog-modeling to deliver studio-quality vox ac30 top boost amp emulation in a compact pedalboard format”
— from the listing
“63 vox ac30 top boost emulation capturing the chiming british clean and sparkle of the definitive beatles-era amplifier at universal audio dsp quality”
— from the community notes
“The UAFX Ruby '63 Top Boost Amplifier delivers Vox AC30 chime and jangle at Universal Audio quality for British Invasion, indie, clean, and jangle pop players who want studio-grade vox ac30 top boost amp emulation from a respected professio…”
— from the community notes
- chiming
- british
- studio
- sparkle
- jangle
- jangly
- chime
- indie
Good for
- Live
- Silent Recording
- Silent Stage
- Studio
Price updated Oct 24, 2026
Genres the Universal Audio Uafx Ruby '63 Top Boost Amplifier is commonly used in
- Indie
Amps that pair well with the Universal Audio Uafx Ruby '63 Top Boost Amplifier
Swart Space Tone Atomic Jr. Two-Tone
Swart
35% matchSwart Space Tone Atomic Jr. Two-Tone leans toward lush, and that's a real, usable character to pair with
Comes later in the signal chain
Divided by 13 JRT 9/15
Divided By 13
34% matchDivided by 13 JRT 9/15's own dynamic character is the real reason this is worth trying
Comes later in the signal chain
Ceriatone HRM 50
Ceriatone
tonal matchComes later in the signal chain
Ceriatone HRM 50 pushes a edge of breakup tone toward mid-forward
Ceriatone Overtone Special HRM Bluesmaster 50
Ceriatone
tonal matchComes later in the signal chain
Stack Ceriatone Overtone Special HRM Bluesmaster 50 on top and a edge of breakup tone tightens toward mid-forward
Roland Cube Street EX
Roland
tonal matchComes later in the signal chain
Feed a edge of breakup signal into Roland Cube Street EX and it comes out closer to mid-forward
Ceriatone JTM45 MkII
Ceriatone
tonal matchComes later in the signal chain
Feed a edge of breakup signal into Ceriatone JTM45 MkII and it comes out closer to low gain
Gallien-Krueger GK Legacy 4x10 Bass Combo Amp
Gallien Krueger
tonal matchComes later in the signal chain
Gallien-Krueger GK Legacy 4x10 Bass Combo Amp takes that edge of breakup character and pushes it toward mid-forward
ENGL E610II Savage 120 MkII Head
Engl
tonal matchComes later in the signal chain
ENGL E610II Savage 120 MkII Head takes that edge of breakup character and pushes it toward mid-forward
Pedals that stack with the Universal Audio Uafx Ruby '63 Top Boost Amplifier
J. Rockett Archer
pedal
18% matchStack J. Rockett Archer on top and a edge of breakup tone tightens toward low gain
Comes later in the signal chain
Greer Southland
Greer
18% matchFeed a edge of breakup signal into Greer Southland and it comes out closer to clean boost
Comes later in the signal chain
TC Electronic Mimiq Doubler
TC Electronic
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Put TC Electronic Mimiq Doubler after Universal Audio Uafx Ruby '63 Top Boost Amplifier in the signal chain, clear of Universal Audio Uafx Ruby '63 Top Boost Amplifier's own gain stage
Comes later in the signal chain
Jackson Audio Bloom EQ Boost Compression
Jackson Audio
10% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.
Universal Audio Uafx Ruby '63 Top Boost Amplifier leans toward airy, and that's a real, usable character to pair with
Comes earlier in the signal chain
Malekko Electro-Harmonix Memory Toy Analog Delay
Electro-Harmonix
6% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Malekko Electro-Harmonix Memory Toy Analog Delay's modulated voice goes after Universal Audio Uafx Ruby '63 Top Boost Amplifier in the signal chain — it's not there to compete with Universal Audio Uafx Ruby '63 Top Boost Amplifier's own airy character — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Strymon BigSky
Strymon
6% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep Universal Audio Uafx Ruby '63 Top Boost Amplifier's airy voice out front: Strymon BigSky goes after Universal Audio Uafx Ruby '63 Top Boost Amplifier in the signal chain so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Cry Baby Dunlop Cry Baby 535Q Multi-Wah
Cry Baby
tonal matchComes earlier in the signal chain
Cry Baby Dunlop Cry Baby 535Q Multi-Wah belongs in front of Universal Audio Uafx Ruby '63 Top Boost Amplifier, since a wah tracks picking dynamics best on the raw signal
Source Audio Toolblox Programmable EQ
Source Audio
tonal matchComes later in the signal chain
Put Source Audio Toolblox Programmable EQ after Universal Audio Uafx Ruby '63 Top Boost Amplifier
Cheaper alternatives
Mooer Micro Preamp 004 Day Tripper
Mooer
61% similarityShared character: gold sparkle
TC Electronic Ampworx Vintage Series DC30
TC Electronic
58% similaritySimilar voicing: harmonically rich, bright
Vox Valvenergy Mystic Edge
Vox
58% similarityShared character: gold sparkle
Carl Martin AC-Tone
Carl Martin
54% similarityShared character: gold sparkle
Free The Tone Crunchy Chime CC-1B
Free The Tone
48% similarityShared character: gold sparkle
Mooer Micro Preamp 013 Matchbox
Mooer
47% similaritySimilar voicing: airy, glassy
Similar character
See all alternatives to the Universal Audio Uafx Ruby '63 Top Boost Amplifier (cheaper + boutique) →
Questions people ask
What are good alternatives to the Universal Audio Uafx Ruby '63 Top Boost Amplifier?+
The closest matches in character are the Tech 21 SansAmp Oxford, the Lovepedal DOV Death Of Vox Handwired, the Mooer Micro Preamp 004 Day Tripper. Budget picks: Mooer Micro Preamp 004 Day Tripper, TC Electronic Ampworx Vintage Series DC30, Vox Valvenergy Mystic Edge.
What pairs well with the Universal Audio Uafx Ruby '63 Top Boost Amplifier?+
Strong matches from rig and tone-complementarity evidence: Swart Space Tone Atomic Jr. Two-Tone, Divided by 13 JRT 9/15, Ceriatone HRM 50 — Swart Space Tone Atomic Jr. Two-Tone leans toward lush, and that's a real, usable character to pair with.
How much does the Universal Audio Uafx Ruby '63 Top Boost Amplifier cost?+
Around $399 (live listing price, updated Oct 24, 2026).