Yes those my sound cube EL84 are really musical with them. The other ones I like are the 211s made by the guy who owns the uni here, he has voiced his 211 on them, and he is also a distributor for Ming Da as was known for DIY upgrades here. His 211 were better than all other SETs mentioned in my write up plus thoress hybrids and silvercore 833c 20w on the uni. They are voiced with KR 211 but will sound much better with Amperex 211.