In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. Designed especially for acoustic guitarists, Yamaha's Magicstomp Acoustic delivers a wide variety of powerful sounds and effects for studio and stage. Featuring 99 custom factory and artist presets, an automatic feedback eliminator, and a chromatic tuner, the Magicstomp Acoustic also boasts microphone and speaker simulations, a headphone jack for private monitoring, and an interactive software based editor.