When you think about it, nothing has surpassed the original designs. Of course tweaks to improve on originals, but that's progress. You want that, to get it as great as you can get, tweaking capacitors, inductor's, newer smoother drivers, but really a clean 50 watt amp that can stand up, or surpass a 500 watt b&w 801 speaker combo, for live sound, that's pretty amazing in this day and age. You guys/girls that own them know what I mean! Sent from my N9131 using Tapatalk