Stagg 20AAR 20w Acoustic Guitar Amp
This 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 it has 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.
Here's what Stagg say about the 20AAR Amp
1 x 6" speaker
3 band eq + separate parametric mid control
Volume & gain controls
Stereo input for tape/cd/mp3 player
size (h x w x d): 33.8 x 35 x 20 cm