I've only heard the combo once, because one of my employees owned a set of LS3/5as. We ran them on our S-30. The speaker is an effortless load (16 ohms) so it is very tube friendly. I remember being quite surprised at how well they did bass. And the rest of the range was fine. the S-30 is as big an amp as you want to put on them; the LS3/5s don't take a lot of power.
In response to what figore states,there is an extremely brilliant audioguru who works in Excel HiFi in HONG KONG,he matches his LS3/5a with the Futterman OTL monoblocks,and this is a guy with access to any audio gear he wishes to have. Sphere.
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