Today I received a 332C which I purchased from one of the members here. I bought it because it was available locally thinking that I could use it with some of my lessor headphones but certainly that it would not drive my HE-500's. I was wrong. It not only drives the HE-500's but it does so effortlessly and with such beautiful liquid sounds that I feel I have heard these HP's again for the first time. The 332C has far more than enough gain to drive these HP's and still maintains a tight and detailed bass foundation. The mid's are to die for especially with female vocals (absolutely spooky at times). Highs are pure silk. I know from experience that there can be a synergy between components that just lock onto musicality. Well, the HE-500 with the La Figero 332C is a match made in audio heaven. Just wanted to share this for anyone thinking, like I did, that class A tube gear won't drive the HE-500's. At least this one piece of gear can do it.