I really like most Roland gear. But I had problems with their KC-300 keyboard amp. The cabinet had a very noticable buzz with any sound that had even moderate low end content. I even swapped it for another thinking I must have had a bad one but the second was identical. That of course may not be true of all their keyboard amps but after 2 of them I was tired of trying and simply got a powered cabinet that didn't have that problem.