I bought this amp on Ebay many years ago. It was a well know kit at the time. I have no idea now who’s design. Very intricate and very expensive. Works great. 500 watts at 8 ohms and it is 4 ohm stable. No definate wattage given. I would use this as an audiophile amp with a 10 or 12 Dayton Reference woofer. I did both.
$175.
This has well over $500 in parts.