Can 2 bpa300 or pa300 boards be linked by a DRV for a bpa600? Also does anyone have a good negative for the opamp biased 150 or other solid designs for this chip? My printer isn't large enough for a 300 as it takes 2 pages and I'm not so good with computers to where I can print it on an angle to fit. I have a bunch of these chips and power needs of all sorts of designs that are sonically pleasing would be great. How is JIms audio boards?