Hi,
I've had mine going on 4 years and they just keep on keeping on.
They drive Wilson Audio Sophia series 2 to 100db no problems at all.
Very full and accurate sound...its rubbish in, rubbish out; gold in, gold out with these fellas.
eg. Brown Sugar and Honky Tonk Woman on the The Rolling Stones Rolled Gold CDs (remastered by the sound of them) are rubbish when compared to those songs on the original albums.
Makes you wonder what the producers were listening to.
Can't recommend these highly enough' I'd love to try them on some Avantgeguard horns, but...