Older AMT S25B with preamp. This mic has been well used (and it shows, the gooseneck is a little limp and cable is a little worse for wear) but sounds good and was always reliable when I was using it. When I was using it regularly I had considered having it refurbished by AMT (which is quite reasonable), but never got around to it. It's been sitting around unused for a while so I'm going to let it go.