TonewoodAmp
A compact acoustic-guitar amplifier and effects processor that uses the instrument’s body to project processed sound.
Last updated August 25, 2026
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Overview
TonewoodAmp is a musical-instrument accessory designed to give acoustic guitarists amplified effects without requiring a conventional external amplifier and speaker setup. The device combines a compact amplifier with digital signal processing and is installed on an acoustic guitar through a magnetic internal brace known as the X-brace component. A pickup captures the guitar signal, while the external controller processes it with effects such as reverb, delay, echo, and tremolo. The processed vibration is then directed back into the guitar body, allowing the instrument itself to act as part of the sound-producing system. The product was conceived and prototyped by Ofer Webman. After the initial working prototype, engineers were involved in refining the design for practical use with acoustic guitars. TonewoodAmp entered the market in 2014 and became informally known among some users as the “Twamp.” Its principal proposition was portability and simplicity: guitarists could obtain ambient and modulation effects from an acoustic instrument without carrying a traditional amplifier and effects-pedal chain. The product was positioned in reference coverage as an innovative and relatively affordable solution for acoustic players. The system requires users to determine a suitable position for the internal magnetic brace and calibrate the unit to the particular guitar. Reviews have noted that installation and positioning can require patience, and that additional tape or adhesive may help secure the internal component in some guitars. The device has also been described as sensitive to battery choice and setup. An iOS connection cable was offered separately for users who wanted to connect the unit to Apple devices. TonewoodAmp’s technology occupies a distinct space between acoustic-guitar accessories, miniature amplification, and onboard effects. Its approach has also been followed by guitar manufacturers that introduced related body-resonance technologies integrated into particular guitar models, whereas TonewoodAmp is sold as an accessory that can be fitted to compatible instruments. The brand’s known users include Andy McKee, Mike Dawes, Becky Langan, Larry Mitchell, Ben Lacy, Guy Buttery, Karla Davis, Cory Batten, Dayna Manning, Steve Katz, Jerry Douglas, and George Benson. In 2024, the company introduced TonewoodAmp 2. The second-generation system added Bluetooth connectivity and a companion mixing application for iOS and Android. It can run four effects simultaneously, uses a rechargeable battery, and has a smaller external controller. Its revised attachment mechanism is intended to accommodate guitars with curved backs. These changes extended the original concept while addressing portability, compatibility, and modern mobile-device integration. Publicly available reference material does not establish the company’s headquarters, ownership structure, revenue, or listing status.
History
TonewoodAmp originated from Ofer Webman’s effort to create a compact system that could produce amplified effects from an acoustic guitar without depending on a conventional amplifier. Webman developed a working prototype, after which engineers helped refine the design. The resulting product combined a pickup-driven signal path, digital effects processing, and a magnetic internal brace that transferred processed vibration into the guitar’s body. Introduced in 2014, TonewoodAmp was designed as an accessory rather than as a guitar-specific factory installation. Its external controller could be mounted to the instrument while the magnetic X-brace component was positioned inside the guitar. In operation, the guitar’s pickup supplied the source signal, the unit applied effects, and the guitar body contributed to the projection of the processed sound. The available effects included reverb, delay, echo, and tremolo, giving players access to sounds more commonly associated with an amplifier and effects pedals. The product’s installation method was central to both its flexibility and its learning curve. Users needed to experiment with the location of the internal brace and calibrate the system to their guitar. Published reviews reported that the setup instructions were extensive and that optimal placement could vary between instruments. Review commentary also suggested reinforcing the internal component with tape or adhesive in some circumstances. Early practical observations included occasional signal cutouts that could be addressed by following the recommended AA-battery specifications. Connectivity with Apple devices was possible through a separately sold iOS cable. During the decade following its launch, the product became known informally as the “Twamp.” Its body-resonance concept existed alongside related technologies introduced by guitar makers such as Yamaha and LAVA, although those alternatives were associated with purchasing particular guitars rather than adding an independent accessory to an existing instrument. TonewoodAmp therefore retained a differentiated position for players seeking an add-on solution. The brand’s visibility was also supported by use among professional and prominent guitarists, including Andy McKee, Mike Dawes, Becky Langan, Larry Mitchell, Ben Lacy, Guy Buttery, Karla Davis, Cory Batten, Dayna Manning, Steve Katz, Jerry Douglas, and George Benson. In 2024, TonewoodAmp introduced TonewoodAmp 2. The new model brought Bluetooth connectivity and a companion mixing app for both iOS and Android. It expanded the effects architecture to permit four effects at once, replaced the earlier battery arrangement with a rechargeable battery, reduced the size of the external controller, and added an attachment mechanism intended for guitars with curved backs. These changes represented the brand’s principal documented product-generation update. Public reference material does not provide reliable details about corporate incorporation, headquarters, ownership, financial performance, or distribution scale.
- 2024
TonewoodAmp 2 released
[1]The second generation added Bluetooth, an iOS and Android mixing app, four simultaneous effects, a rechargeable battery, a smaller controller, and curved-back guitar compatibility features.
- 2014
Original TonewoodAmp introduced
[1]TonewoodAmp entered the market as an acoustic-guitar accessory combining amplification, digital effects, and a magnetic internal brace that used the guitar body to project processed sound.
Products and positioning
Portable, affordable acoustic-guitar amplification and effects that use the guitar body as part of the sound projection system.
Acoustic guitar amplifier and effects accessory · 2014
TonewoodAmp
The original TonewoodAmp is a compact amplifier and digital signal processor for acoustic guitars. It receives the instrument signal from a pickup and applies effects such as reverb, delay, echo, and tremolo. A magnetic X-brace component is placed inside the guitar, while the external portion controls the system and transfers processed vibration into the guitar body. Installation and positioning are adjusted to the individual instrument, and an iOS connection cable was available separately.
Second-generation acoustic guitar amplifier and effects system · 2024
TonewoodAmp 2
TonewoodAmp 2 updates the original body-resonance accessory with Bluetooth connectivity and a companion mixing application for iOS and Android. The system supports four effects at the same time and uses a rechargeable battery. Its external controller is smaller than the earlier design, and its attachment mechanism is intended to work with guitars that have curved backs.
Brand decisions
2024
Development of TonewoodAmp 2Generation changeBackground
The first-generation system established the brand’s accessory-based approach but required manual positioning and used replaceable batteries. The second generation addressed additional connectivity, portability, battery, and guitar-shape requirements.
Action taken
TonewoodAmp launched a smaller controller with Bluetooth, mobile-app integration, simultaneous four-effect operation, a rechargeable battery, and a curved-back attachment mechanism.
Aftermath
The update expanded the system’s mobile-device functionality and compatibility while preserving its use of the acoustic guitar body for sound projection.
Sources2 sources
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