Music Gear Review: Keeler Sound ReWave Natural Preamps

ReWaveis an acoustic amplifier and feedback reducer for acoustic guitars. ReWave is made of maple and brass and fits exactly into the sound hole of an acoustic guitar. Called a natural acoustic pre-amp, ReWave is handmade, uses no batteries and requires no special tools for its installation. We did have to loosen the strings completely on a Taylor 655C 12-string acoustic guitar to pop it in.

Its clever design features four silicon mounts located around ReWave’s circumference. By adjusting these, you can custom-fit the device into your guitar’s sound hole tightly but without damage to the finish.

Once installed, ReWave enhances the guitar’s sound projection with a tighter bass and mid-range clarity. There is an internal reflector plate that is adjustable. The reflector plate slides back and forth on two brass rods and offers a way to tune the guitar’s body--its resonant chamber. Not only to reduce possible feedback but also to achieve a more compressed overall sound with tighter low frequencies. This will produce a louder amplified sound with a mic out front.

In our testing, my guitar player found the guitar’s sound to have a crisper sound with less lows with the reflector all the way forward toward the sound hole. Moving the reflector plate farther back—there is about 1 ½-inches of travel possible—returns more of the instrument’s original tone but at the expense of less stage volume before feedback.

There are Keeler Sound ReWave Natural Preamps for bass, ukulele and of course most acoustic guitars. The Keeler Sound ReWave sells for $279 MSRP.


Barry Rudolph is a recording engineer/mixer who has worked on over 30 gold and platinum records. He has recorded and/or mixed Lynyrd Skynyrd, Hall & Oates, Pat Benatar, Rod Stewart, the Corrs, and more. Barry has his own futuristic music mixing facility and loves teaching audio engineering at Musician’s Institute, Hollywood, CA. He is a lifetime Grammy-voting member of NARAS and a contributing editor for Mix Magazine. barryrudolph.com