In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. 100 Watt Acoustic Combo w/12" & tweeter. The Shenandoah series of acoustic guitar amps have been designed with professional appointments and quality to reproduce the warmth and woody tone of a quality acoustic instrument. The rich full-range response is further enhanced by a 24-bit ALESIS digital effects processor that produces studio quality lush reverbs and chorus effects.