Universal Audio UAFX Flow Vintage Tremolo – Classic Tube Tremolo in Three Flavors

The Universal Audio UAFX Flow Vintage Tremolo packs the warm, musical movement of classic tube-driven tremolo circuits into a compact, rugged pedal. Borrowing its algorithms from UA’s top-tier Astra Modulation Machine, Flow delivers three beautifully modeled tremolo styles — each infused with the rich tone of a vintage tube preamp.

Key Features

• Three iconic tremolo voices: DHARMA for lush harmonic tremolo, 65 for smooth optical sway, and SQUARE for bold, choppy pulses.
• Authentic tube feel: Includes emulated tube preamp coloration for added warmth, grit, and musical depth.
• Easy tempo control: Tap tempo for syncing tremolo speed to your playing in real time.
• Flexible signal path: Switchable true or buffered bypass for optimal integration on any pedalboard.
• Intuitive performance layout: Speed, Depth, and Volume controls with an LED that flashes at the tremolo rate.

Why Musicians Love It

Flow Vintage Tremolo delivers everything players love about vintage tube tremolo — warmth, movement, and musical character — without the unpredictability of aging hardware. Its trio of tremolo modes makes it extremely versatile, offering everything from subtle shimmer to stuttering rhythmic motion. With reliable construction and a compact footprint, it’s a stage-ready modulation tool built to inspire.

Quick Specs

• Modes: DHARMA (harmonic), 65 (opto), SQUARE (square wave)
• Controls: Speed, Depth, Volume, Tap Tempo
• Bypass: Selectable true or buffered
• Power: 9 VDC (not included)

What’s in the Box

• Universal Audio UAFX Flow Vintage Tremolo Pedal
• Documentation

Ideal For

Guitarists, keyboardists, and vintage-tone lovers seeking warm, expressive tremolo with tube-like richness and flexible sonic character.

Pros & Cons

✅ Pros:

• Three distinct tremolo styles in one pedal
• Tube-style coloration adds warmth and realism
• Tap tempo for live timing accuracy

⚠️ Cons:

• Mono operation only
• Requires external power supply

Universal Audio’s Flow Vintage Tremolo brings classic, tube-driven tremolo effects into a modern, reliable format — a timeless modulation pedal for expressive players.