This is a classic Roland DAC-15XD guitar amplifier - a very distinctive and stylish model, with unusual four speaker setup. Released in 1987, I think this was an early attempt at integrating digital effects into an amp. All still functional and sounding good.
Cosmetically it's in pretty good shape - some minor marks and scratches, and the the orange top of one of the knobs is missing, but otherwise nothing significant to note.
You get some of the crackling when turning the knobs that's typical of older amps, so it would benefit from a light refurbish.