I have both Rawson F 5 mono blacks and a Real FirstWatt F5 from Nelson Pass. The sound very similar in all areas! As to the intellectual property, that is a personal choice that individuals make with the possibility of being held accountable. It would be better to dig your hands in and do your own diy amp with the use of official Nelson Pass boards, avail on there website. Is this what China does? I have had great luck with TR amps and with the cost of parts, he did not make much if anything, but still the question. I have found soldering not so hard thus built a B1 and am working on some chip amps for practice. diypass.com and firstwatt.com. Notice, official Firstwatt buyers got free upgrades last month...
