I have a recently purchased db500(mint). If youve never tried one you should. Its an awesome combo amp. Check out any of the reviews online. They are now extremely rare and hard to find. If anyone wants it you can make me an offer. I will take cash or trade for a gk mb150. Some Reviews: http://www.epinions.com/content_89410539140 http://www.activebass.com/resources/review.asp?i=1873 http://www.bgra.net/reviews/roland-db500-1-rvw.html email me: [email protected]