Revive Retro Vibes with the Universal Audio Flow Vintage Tremolo Effects Pedal

Guitar effects pedal with three flavors of tube-driven tremolo effects, tap tempo, perfectly emulated preamp circuit, volume boost, and true/buffered bypass, all in a compact stompbox. Evolved from our flagship Astra Modulation Machine, Flow Vintage Tremolo gives you three flavors of tube-driven wiggle and shake — from old school to modern — in a dapper, compact package.

• Authentic emulations of three tube-driven tremolo effects, captured in a compact stompbox
• Perfectly captured tube preamp for fat, three-dimensional tremolo tones
• Three tremolo modes - Dharma (harmonic tremolo), 65 (round, sine wave), and Square (choppier, square wave)
• Onboard tap tempo for syncing trem effects
• Volume control and true/buffered bypass
• Timeless UA design and craftsmanship, built for decades of dependable performance

Dharma - Experience Thick Harmonic Tremolo

Immerse yourself in the chewy throb of early '60s American "brown" amps, and add a syrupy mix of volume fluctuation and phase shifting — far beyond the original circuit — that's perfect for vintage soul, surf, and even Uni-Vibe textures.

65 - Indulge in Perfect Tube Amp Tremolo

Play through an exhaustive end-to-end emulation of a classic 1965 American tube amp's optical tremolo circuit, and get the pulsating shimmer of the most famous "vibrato" ever created. Sounds just like your favorite old record.

Square - Add Modern, Choppy Textures

Built from the ground up using our own virtual optical photocell, get the rippling beauty of square waveforms and dive into rhythmic trem effects that enhance any genre, from modern pop and R&B to blues and indie rock.

Get the Authentic Tone of a Tube Preamp

Flow gives you the warm, complex sounds of a tube preamp — in this case from early and mid-'60s American combos — so your tremolo effects are more present, three-dimensional, and musical.

Paint the Town with a Rugged, Compact Stompbox

Built for years of trustworthy performance, Flow Vintage Tremolo gives you switchable true/trails bypass, tap tempo, and "make up gain" Volume control to ensure your tremolo effects are heard loud and proud for years to come.

SPECIFICATIONS

• Power requirements: Isolated 9VDC, center-negative, 250mA minimum (sold separately)
• Inputs: 1 x 1/4” TS unbalanced
• Outputs: 1 x 1/4” TS unbalanced
• USB Type-C for updates via computer
• Height: 5.81 cm, 2.29 inches
• Width: 6.55 cm, 2.58 inches
• Depth: 12.07 cm, 4.75 inches
• Weight: 0.659 lbs (0.299 kg)

Manufacturer: Universal Audio
Model: GPS-FLOW
SKU: I758172-N-2-WHXX
UPC: 819937003905

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.