Quick answer: The Flow Vintage Tremolo is an authentic Universal Audio UAFX product. Priced at $169.00, sold brand-new by Victory Musical Instruments, a veteran-owned authorized UA dealer in Miami, FL. Questions? Call 844-687-4208.

Three flavors of vintage tube-driven tremolo, in a compact stompbox. The Universal Audio UAFX Flow Vintage Tremolo offers three voices drawn from the flagship Astra Modulation Machine — Dharma harmonic tremolo, 65 sine-wave tremolo, and Square choppy tremolo — for everything from chewy '60s "brown" amp tones to choppy modern square-wave pulses.

At a Glance

Overview

Tremolo is the volume-pulsation effect built into many classic tube amps, and the specific character changes dramatically based on the underlying circuit. Flow captures three of the most coveted vintage tremolo flavors: Dharma is a harmonic tremolo similar to the early '60s American "brown" amps (think Beach Boys, surf, soul) with phase-shifting depth beyond the original circuit; 65 emulates the smooth sine-wave optical tremolo of a 1965 Fender amp (the most famous "vibrato" sound ever); and Square delivers choppy on-off pulses for choppy modern textures.

Key Features

• Three Tremolo Voices — Dharma (harmonic), 65 (sine-wave), Square (choppy).
• Captured Vintage Preamp — Adds tube-driven warmth even with tremolo bypassed.
• Tap Tempo — Built-in tap tempo via the footswitch.
• Volume Boost — Boost the output level to compensate for tremolo's perceived volume drop.
• Switchable True/Buffered Bypass — Configure via UAFX Control app.
• Five Top-Panel Knobs — Standard UAFX compact controls.

Specifications

• Format — Compact UAFX single-footswitch pedal with 5 knobs and 3-way mode switch.
• Power — Isolated 9V DC, center-negative (sold separately).
• Inputs — 1 x 1/4" TS (mono).
• Outputs — 1 x 1/4" TS (mono).
• Bypass — Switchable true/buffered bypass.
• Top-mounted jacks — Compact, pedalboard-friendly layout.

What's in the Box

• UAFX Flow Vintage Tremolo pedal
• Quick start guide
• Note: 9V isolated power supply sold separately

Frequently Asked Questions

What power supply does this UAFX pedal need?

It runs on a standard 9V DC center-negative power supply (larger UAFX models need a higher-current supply). Check the box contents listed above to see whether a power supply is included with this model.

Is it true bypass, and does it work in stereo?

UAFX pedals offer switchable true or buffered bypass via the free UAFX Control app, and stereo-capable models accept and output stereo through their TRS or dual jacks.

Do I need the UAFX Control app to use it?

No, the pedal works standalone right out of the box. The free UAFX Control app (mobile and desktop) is optional and unlocks extra presets, alternate models, and deeper settings.

What's included in the box?

Your purchase includes: UAFX Flow Vintage Tremolo pedal, Quick start guide.

Is the Flow Vintage Tremolo a genuine Universal Audio product?

Yes. Victory Musical Instruments is a veteran-owned, authorized Universal Audio dealer based in Miami, FL. Every unit is brand-new, factory-sealed, and covered by the full UA manufacturer warranty.

Can I get help choosing or setting it up?

Absolutely. You'll talk to real people, not a call center. Call us at 844-687-4208 and we'll help you spec the right gear and get it running.

Why Buy from Victory Musical Instruments

Victory Musical Instruments is a veteran-owned authorized UA dealer based in Miami, FL. We back every sale with real human support, fast shipping, and the kind of follow-through that only comes from a small dedicated team. Active duty, veterans, reservists, and eligible family save through our ID.me military discount program.