Here's a link to a demo
http://www.youtube.com/watch?v=1yhapuW413Y
My Roland DAC-15 is over 25 years old... It's had 1 minor functional repair [guitar in jack] and one modification to make the controls easier to see and operate.. It was not designed as an acoustic guitar amp, but I've play my e/a through it and it sounded good to me...
I hope this give you a little help..
good luck and keep on pickin'
Gordon..
