The THR5A from Yamaha is a desktop modeling guitar amp that simulates four different microphone types and is specifically designed for use with electric-acoustic and silent guitars. In contrast to normal stage amplifiers, the THR5A is intended for off-stage uses such as recording and practicing. Equipped with a USB port, the amp is capable of being used in conjunction with your computer for advanced editing of guitar sounds, recording and playback using the included software package. The THR5A i