I have a used Digital Designs M2b amp for sale. Only reason I am selling this is because I recently purchased a new car. I'm enjoying having a trunk again so I'm keeping my new car factory. Amp works perfectly and never had any problems out of it. There is a couple minor scratches and slightly bent mounting brackets. I would rate it 10/10 mechanically and 8/10 cosmetically. Comes with original box, papers and bass control knob. The cord for the bass control knob will NOT be included, one of the clips that holds the cord in place is broken and it's just not worth the trouble taking it out my old car. Asking $475 shipped.