This is a vintage Sunn alpha 115 amplifier. It's a phantom amp that's rarely seen. There's some crackling when turning the level knob, but the sound comes out clearly. It sounds great with both guitar and bass. I've taken good care of it. I want to pass it on to someone who will continue to cherish it. I'd like to do a final check before shipping, so please comment before purchasing. fender marshall fender bass amp guitar amp effects pedal YAMAHA Sunn loud volume