The World's Most Natural Spring Reverb for Nylon-String Guitars

With the ASPRI Clip-On Reverb, enjoy authentic reverb straight from your guitar, completely unplugged—no batteries, cables, pickups, modifications, or installations. 

Inspire your creativity with every note, wherever you play.

Bring Your Guitar to Life

The ASPRI Clip-On Reverb captures your guitar’s natural vibrations at the saddle and blends them with rich reverb. It resonates through the sound hole, surrounding you with warmth and adding depth to every note.

It’s the only reverb tool for nylon-string guitars that requires no batteries, cables, pickups, or installations. Simply clip it on and play!

Click to compare the sound. Hear the difference without and with the ASPRI Clip-On Reverb—carefully synced for an almost seamless comparison. All audio is raw and unprocessed.

Bossa Nova Demo
Strum & Tap Demo

Without ASPRI: Dry vibrations pass through the saddle, leaving the tone flat and lacking depth.

With ASPRI: Vibrations pass through the saddle & into the reverb tank, blending with rich reverb to add warmth and depth.

Acclaimed by World-Renowned Artists

Zakk Wylde
Zakk WyldeGuitar legend & founder of Black Label Society
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Having a blast with the Aspri reverb unit. Super cool little invention. Like playing your acoustic in the studio with headphones on and all the great sounding. Inspiring reverb… Definitely cool for songwriting.
Andy Grammer
Andy GrammerMulti-platinum singer-songwriter
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The Aspri Reverb is awesome because it gives you reverb just live… It totally creates a mood for live performance. Love this thing!
Vernon Reid
Vernon ReidGuitar legend & founder of Living Colour
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Aspri, the pocket spring reverb for acoustic guitar is a fantastic PHYSICAL effect. No Bluetooth. No batteries!
Brendan Benson
Brendan BensonSinger-songwriter, producer & co-founder of The Raconteurs
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I’m stunned! It’s so simple, and so genius and subtle at the same time!
Eren Cannata
Eren CannataSongwriter, producer & co-owner of Cove City Sound Studios
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The best analog spring reverb I have heard in a long time & best of all I can bring it with me anywhere!
Mario Guini
Mario Guini4x Latin Grammy "Multi Platinum Winner" & guitar player for Marc Anthony
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Not only does it sound amazing but it inspires and truly captivates you.
Matthew & Gunnar Nelson
Matthew & Gunnar NelsonSinger-songwriters & founders of the band Nelson
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Our Aspris allow us to sound richer, fuller, and more inspired in even the most intimate and revealing venues. What a stroke of genius- a spring reverb on your acoustic guitar.
Chris Henderson
Chris HendersonLead guitar player for 3 Doors Down
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Where has this thing been all my life. Instant inspiration guys!
Andy Vargas
Andy VargasLead singer for Santana
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I felt an immediate inspiration and wanted to play more.
Jessica Lynn
Jessica LynnBillboard-charting singer-songwriter
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This was amazing. Playing guitar felt like a whole new experience. The guitar sounded incredible.
Sandy Beales
Sandy BealesBass guitar player for One Direction
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Playing around with my Aspri Reverb for acoustic guitars, they are insane, guitarists and musicians check them out.
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Andy Grammer, multi-platinum singer-songwriter

Chris Henderson, lead guitar player for 3 Doors Down

Zakk Wylde, guitar legend & founder of Black Label Society

Mario Guini, 4x Latin Grammy "Multi Platinum Winner"

Your Personal Concert Hall

Imagine the feel of a concert hall at your fingertips.

With every pluck or strum, the ASPRI Clip-On Reverb surrounds you in lush, immersive sound, letting your guitar sing with fullness and expression.

Whether you're at home, on the beach, in a studio, or around a campfire, ASPRI turns any setting into your personal stage, filling it with resonant, inspiring sound wherever you play.

Take ASPRI on Stage

You don’t need a pickup or amp to play ASPRI, but if you do, its natural reverb seamlessly enhances your amplified sound.

Whether performing for an intimate crowd or a packed venue, ASPRI delivers pure, authentic reverb—completely feedback-free—connecting you with your audience.

Watch Mario Guini perform with ASPRI live at the Latin Billboard Awards!

Play Video about Mario Guini performing with the Aspri Clip-On Reverb on his guitar on-stage at Latin Billboard Awards
Play Video about Mario Guini performing with the Aspri Clip-On Reverb on his guitar on-stage at Latin Billboard Awards

Clip It On in Just 2 Simple Steps

Step 1: Attach

Slide your ASPRI under the strings, ensuring it makes contact with the saddle. The padded back rests against your guitar, securing it in place.

Step 2: Adjust & Play

Adjust the tension until part of the captor bar becomes visible. Then, align the ASPRI for a snug fit and optimal sound quality.
Roberto Aspri inventor with Aspri Clip-On Reverb for acoustic guitar circa 1988

Roberto Aspri, inventor & founder of ASPRI, pictured in the late 1980s

The Original and Still Unrivaled

Invented in 1968 from a deep love for music and a desire to inspire, ASPRI became the world’s first fully mechanical spring reverb for acoustic guitars. With guidance from virtuosos like Liona Boyd and Alexandre Lagoya, ASPRI was crafted through relentless experimentation—giving musicians a tool to elevate their sound naturally.

Perfected over 55 years, ASPRI continues to deliver unmatched natural reverb and timeless design, trusted by world-renowned artists to bring warmth and depth to every performance.

Proudly made in Canada, ASPRI isn’t just a reverb tool—it’s a legacy of passion and creativity, designed to inspire musicians with every note.

Reviewed by:

“When you play, the vibrations from your saddle will trigger the springs inside the Aspri’s reverb tank, giving you completely real, live reverb… I had a ton of fun checking this out.”

See How ASPRI Inspires Musicians

David "Sawlon" Lawson
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I purchased my first Aspri Reverb in 1988 after seeing it advertised in Guitar Player Magazine. That was back when they had the little Soundpage flexible records inside. Al Di Meola was demonstrating it and I was blown away! I still have that unit and also the new one which I have on my guitar all the time. Thank you Aspri for this wonderful product!
“Flamenco Chuck” Keyser
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I am VERY impressed with the new version; the redesign is highly successful. It sounds great (like a spring “cathedral” reverb, but the spring sound is not overdone; the effect is very smooth…Bottom line: this is not a toy, and does exactly what it is supposed to do. Check out the videos on their website, they don’t lie… I am really impressed with this thing. No electricity, and a very, very nice reverb sound…
Corneille Driezen
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I just bought an ASPRI UNIT – used it on my Blueridge acoustic guitar and… I could hear “heaven”…. Please believe me and try it yourself – you feel like playing in a concert hall ….Great stuff! Thanks a lot for changing my musical life!
Bil Andersen
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The ASPRI is a great accessory! I was very pleased with how dramatically it improved the tonal response and volume of my Yamaha FG-400A. It is an OK guitar but doesn’t have much sustain or response to light fingering/touch. The ASPRI has given it a much better voice and touch response, so I’m very pleased with it. Made a dull guitar sound super! Highly recommended.
Dan Skapinsky
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I just got my Aspri Reverb and I want to tell you that I absolutely LOVE IT! Thanks so much for this awesome product. Your product is unbelievable!
Maximilian Weitenhillinger
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After the installation of the Unit on my guitar, I could not believe my ears it simply blows me away.
John Hasbrouck
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I absolutely love it! The reverb sound is better than ever. … It sounds absolutely magical!
Nattachart Manasirisuk
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It is very easy to install and sounds wonderful! Thank you so much for making such a quality product. I’ll recommend this to all my friends.
Vic Von Gemmingen
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I have applied it to a sort of classical hybrid by Ibanez. It sounds quite amazing, and actually brightens up the guitar’s tone without sacrificing the warmth of the classical aspects of this guitar. I do appreciate very much the engineering that must have gone into getting this right, where right is basically perfection.
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ASPRI Clip-On Reverb

Original price was: $149.95.Current price is: $129.95.

The world’s most natural spring reverb, crafted for nylon-string guitars. The ASPRI Clip-On Reverb captures your guitar’s pure vibrations, enriching your sound with authentic, unplugged reverb—no batteries, cables, or modifications needed. Just clip it on and play, anywhere. Includes Elegant ASPRI Gift Box.

Nylon-string
Steel-string (last chance!)
Matte
Glossy
SKU: 6 27843 30735 8 Category:
Description








Elevate Your Guitar’s Sound with Natural Reverb

Unlock the full depth of your nylon-string guitar with the ASPRI Clip-On Reverb. Completely unplugged and powered by your guitar’s own natural string vibrations—no batteries, no cables, no pickups needed, just pure sound. Whether you’re playing at home, in the studio, or on stage, ASPRI brings concert-hall acoustics wherever you play. Feel inspired by every note.

Why Choose ASPRI?

Without ASPRI: Dry vibrations pass through the saddle, leaving the tone flat and lacking depth.

With ASPRI: Vibrations pass through the saddle & into the reverb tank, blending with rich reverb to add warmth and depth.

  • Unplugged Sound: No batteries, no cables, no pickups needed—ASPRI uses your guitar’s natural vibrations for pure resonance.
  • Quick & Simple Setup: Clip it on in seconds and start playing—no modifications, no hassle.
  • Inspire Creativity Anywhere: Instantly add warmth and depth, bringing your music to life wherever you play.
  • Built to Last: For over 55 years, ASPRI’s award-winning, durable design ensures long-lasting performance.
  • Try It Risk-Free: If it’s not perfect for you, return within 60 days for a full refund—no questions asked.

Hear the Difference for Yourself

Don’t just take our word for it—experience the ASPRI difference firsthand. Click below to hear how ASPRI enhances your guitar’s natural resonance and gives it the depth it deserves:

Bossa Nova Demo

Strum & Tap Demo

Give Your Guitar a New Dimension

Take an entry-level guitar and make it sound mid-range, or take a mid-range guitar and make it sound high-end. The ASPRI Clip-On Reverb enhances your guitar’s natural tone, adding warmth, depth, and richness, no matter what kind of instrument you’re playing. Whether you’re a beginner discovering your sound or a seasoned professional fine-tuning your craft, ASPRI gives you the power to play with more passion, expression, and confidence.

Made in Canada with precision-engineered springs, the ASPRI Clip-On Reverb is built to inspire and crafted to last for decades. Each unit is meticulously assembled and tested, backed by a 5-year warranty and a 60-day satisfaction guarantee.

Don’t wait to fully immerse yourself in your music—discover new dimensions of sound and creativity with warm, natural reverb, instantly and effortlessly.

Additional information
Weight 0.800 kg
Dimensions 25 × 15 × 14 cm
Product Weight

0.263 kg

Product Dimensions

14.2 x 8.3 x 3.6 cm (min.)
21.6 x 8.3 x 8.7 cm (max.)

Brand

Aspri

Model

Nylon-string

,

Steel-string (last chance!)

Cover Finish

Matte

,

Glossy

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About Aspri
Aspri Logo no background

Founded in 1988, ASPRI revolutionized guitar sound enhancement with the ASPRI Clip-On Reverb. Perfected over the years, it effortlessly improves sound quality for guitarists of all levels, without the need for electronic equipment.

Redesigned in 2024, the ASPRI Clip-On Reverb continues to inspire guitarists worldwide, reflecting our commitment to excellence and innovation.

ASPRI Clip-On Reverb

Original price was: $149.95.Current price is: $129.95.
Select options This product has multiple variants. The options may be chosen on the product page
Shipping & Delivery

At ASPRI, we strive to ensure a smooth and reliable shipping experience for all our customers.

Delivery Times

We use ChitChats for all domestic (U.S./Canada) and international shipments to guarantee fast and efficient delivery. Orders ship within 2 business days.

  • Domestic Shipments: 2-8 estimated business days.
  • International Shipments: 5-22 estimated business days.

Tracking & insurance

  • All shipments include insurance for your peace of mind.
  • You will receive an email with your tracking information once the shipment is created and again when it is in transit, allowing you to monitor your package every step of the way.

Adjustable Length

142-216 mm

Weight

263 g

Made in Canada with precision-engineered springs, the ASPRI Clip-On Reverb offers top-notch quality and durability. Each unit is meticulously assembled, tested, and backed by a 5-year warranty.

Enjoy 100% satisfaction with our 60-day money-back guarantee, no questions asked.

Frequently Asked Questions

Do I need to modify my guitar or use batteries or external power to use the ASPRI Clip-On Reverb?

No, unlike other products that require internal modifications, attachments, or power sources like batteries or pickups, the ASPRI Clip-On Reverb works without any of that. Just clip it on (like a capo) and instantly enhance your guitar’s natural sound—simple, fast, and hassle-free.

How does the ASPRI Clip-On Reverb stay in place without using glue, screws, or magnets?

The ASPRI stays securely in place thanks to the gentle tension of its internal springs, which connect to a front bar with three captors. Each captor holds two strings at the saddle, while the padded back piece grips your guitar snugly. This tension keeps it steady without causing any damage—no glue, screws, or magnets needed. Just clip it on and enjoy playing!

Will the springs in the ASPRI Clip-On Reverb wear out over time?

The ASPRI Clip-On Reverb is built to last. The high-quality springs are designed to maintain consistent tension and performance, even after decades of use. The even distribution of tension when clipping the ASPRI onto your guitar ensures that neither the springs nor your guitar experience undue strain. With proper care, your ASPRI will continue to provide authentic reverb for many years.

Do I need a piezo pickup or an electro-acoustic guitar?

No, you don’t need one. However, if you have a piezo pickup or an electro-acoustic nylon-string guitar, you can amplify the ASPRI Clip-On Reverb’s beautiful, natural reverb through your amp. It’s been used on stage by top artists during major performances and concerts, delivering a rich, natural sound that enhances any performance.

Will it fit on any nylon-string guitar? Can it easily be switched between guitars?

Yes, the ASPRI Clip-On Reverb is designed to fit all six-string classical and flamenco guitars. It clips on and off in seconds, making it effortless to switch between guitars whenever you need.

How can I tell if I’ve clipped it on correctly?

For step-by-step instructions to ensure optimal setup and sound, visit our Clip-On Guide and follow the simple process to get the best out of your ASPRI Clip-On Reverb quickly and easily.

Can it cause any damage to my guitar?

No, the ASPRI Clip-On Reverb uses mark-free pads designed to leave no residue or scratches. When clipped on properly, it keeps your guitar’s finish in pristine condition.

Will it affect my guitar's tuning?

The ASPRI Clip-On Reverb slightly shortens the string length by about 2mm, so a quick retune is recommended after clipping on to maintain perfect harmony. It’s a simple step that ensures your guitar sounds its best!

Will it make my guitar sound louder?

No, the ASPRI Clip-On Reverb isn’t an amplifier. Instead, it adds a beautiful, natural reverb that makes your sound last longer and feel richer, creating a fuller and more immersive playing experience.

Is there a way to control the amount of reverb?

The ASPRI Clip-On Reverb adjusts dynamically to your playing style, meaning there's no need for manual controls. After extensive testing and collaboration over many years with renowned guitarists like Alexandre Lagoya and Liona Boyd, we’ve fine-tuned the reverb to deliver a rich, balanced sound that most guitarists love—no adjustments needed!

How is this new model different from the older ones?

The new ASPRI Clip-On Reverb model offers two finish options: a sleek matte with elegant wood-grain designs or a glossy jet-black. It also features improved springs for a more secure fit and clips on more easily, enhancing both style and ease for a smoother playing experience.

What happened to the steel-string ASPRI model?

We’re focusing on the nylon-string version, where the ASPRI Clip-On Reverb enhances sound the most. However, the steel-string model is still available for a limited time! Check our Product page for more information.

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