The Pro Formance 20AA R is a great value amp designed to be used with an acoustic guitar. It can have a guitar and a mic plugged in simultaneously and has an EQ & reverb FX built in. At 20 watts it's only really designed for home use. It can also have a CD/MP3 player plugged into it, so that you can jam along with a backing track.
The Pro Formance/Stagg 20AA R main features,* 1 x 6.5'' speaker
* Instrument input
* Microphone Input
* 3 band eq + separate parametric mid control
* Volume & gain controls
* Headphone output
* Stereo input for tape/cd/mp3 player
* Size (H x W x D): 33.8 x 35 x 20 cm/ 13,3 x 13,7 x 7,9 inches