... it might look like this. Here it is at last, my DIY amp rig. Bear in mind that this is strictly experimental at this point. I will share the intimate design details soon. What you see is: 1. Homemade battery powered preamp, of my own design. Two channels, gain & phase on each input, bass & treble, mute switch, master volume, main and direct outputs. 2. Semi-homemade switching power amp. Started with an AMP1 kit from 41 Hz Audio (www.41hz.com), added a conventional power supply. This puts out roughly 130 Watts. 3. Typical DIY speaker, 12" Eminence 121895 driver from Madisound (www.madisound.com) in a small rear-ported box. I have gigged with the preamp and speaker for several months. The power amp is the last piece of the puzzle. I have run it at fairly high power into a dummy load, but tomorrow at a big band rehearsal will be its first real test.