I had a custom Matamp made for me, so if you ever see a GTV-TC which was green and red, that was mine, haha. I didn't like the sound of it, but it was well made. I got it years ago, delivery and build time was longer then they said, but I would expect that with anything custom. I can't remember the 2 blokes names, but to tell the truth, the one who seemed to do the actual amp building (not cabinets) always put me off calling as he would always be pretty moody, but, they definitely know what they are doing and like I said build quality was very good. I think with the bass amp it will be easier to know what you will actually get.