Traynor AMSTUDIO 2-Channel Compact Stereo 65W Acoustic Guitar AmpAcoustic Master Series Characteristics Effective simplicity and precise reproduction are two of the design criteria Yorkville Sound set for this new line of Traynor Acoustic Master amplifiers. Acoustic electric guitarists and others will be pleased at the "neutral" response available with minimal control adjustments. Active filtering circuits allow effective tonal shaping with fewer knobs and switches so you get the sound you want quickly and easily.