YAMAHA J-100B Bass Amplifier Head by Yamaha [Product Condition] There are scratches from normal use, but there is no damage that affects use, and it can still be used. It has the character of a vintage amplifier. I connected a bass and checked the volume and equalizer functions. There is some crackling, but there are no operational problems. This is the only one available for purchase, so please consider it. Please check the photos carefully and understand that this is a used item before purchasing.