natu-reverb AC-1 MAX for acoustic guitar

Sale price¥22,500

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Shipping within Japan : 890JPY
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■ natu-reverb AC-1 series

✔ Want to enjoy better sound at home
✔ Want to make the most of the original acoustic sound
✔ Don't want to bother with complicated equipment setup.
✔ Want to experience rich sound easily.


We have created a new item that will fulfill all these wishes.
The "natu-reverb" is a new type of reverb that creates a pleasant reverberation from within the instrument without using electricity.

Anyone can easily attach it with magnets, and no modification of the instrument or installation of pickups is required.


Differences from the AC-1n for regular acoustic guitars

The AC-1 MAX has 9 springs, whereas the regular AC-1n natu-reverb for acoustic guitar has 6 springs, resulting in a denser and higher-resolution reverb.

Although the regular AC-1n provides sufficient reverb, some customers wanted a richer reverb, depending on their playing style and preferences. The AC-1 MAX was born from this background.

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[Compatible instruments]
Compatible with general acoustic guitars.
However, it may not be able to be installed on guitars with a sound hole diameter of 7 cm or less, or with side height of 8 cm or less.

[body size, weight]
Size: 13.3 cm × 5.3 cm × 5.8 cm (length, width and height)
Body weight: approx. 135 g
Shipping weight: about 500g

[What is included in the product]
AC-1 MAX, magnet parts set, instruction manual, special case

Pleasant sound comes from within

The natu-reverb is a patented spring reverb that adds richness to acoustic guitars, classical guitars and ukuleles.

A natural analog reverb is generated from inside the instrument , so you can enjoy a pleasant performance from the moment you pick up the instrument.​

natu-reverb is an item for those who want to cherish the raw sound of acoustic instruments.

Which is more important, the amp sound or the raw sound?

The sound coming out of the amplifier and the raw sound from the instrument body.

Of course, both are important, but since it's an acoustic instrument, I still want to enjoy the live sound. Also, at home, you probably spend a lot of time listening to live sounds .

Would you like to enjoy your usual performance more by upgrading the live sound ?

And analog, not digital, reverb is best for live acoustic instruments.

Feel free to enjoy the sound of the stage at home

Unlike digital reverb that adds reverberation to the sound picked up by the pickup, the natu-reverb adds reverberation to the instrument itself , resulting in an overwhelmingly natural reverb.

Would you like to experience the sound of a concert hall in your usual room?

From beginners to advanced players, this is the simplest and most familiar item for those who want to enjoy the sound of wood on acoustic instruments.

Harmony of tradition and innovation

The natu-reverb is the world's only patented analog reverb that can be installed inside a musical instrument.

Combining various ideas and layering more than 50 prototypes, we realized what was thought to be impossible.

The lightweight aluminum construction, magnetic fixing system, and three-point leg support are all important elements, as are the springs.

In addition, the special springs developed jointly with a long-established factory that has been in business for 66 years are different one by one , and are the optimum combination derived from numerous experiments.


*Patent No. 7174457

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