I think the word your looking for is Boogie!! I heard these fine speakers powered by Audio Research equipment at a dealer and yes,the boogie factor was indeed high.
Can the Harbeth 40.1's boggie ?????
I am not looking for ear shattering volume - but everything I have read ( and no, where I live I cannot listen to them )but I am considering them. But, can they play some rock and roll and get out of their own way ???? Reviewers and owners have noted that they sound great at low volume levels - and they have an '' organic natural sound '' - that's great but can they play Lynard Skynard, some Allman Brothers and god forbid some Grateful Dead that well - like they advertise -sounds like real music ??? I also listen to Eva Cassidy, The Eagles, Jackson Browne, Pat Methany, JJ Cale and most of all The Beatles ....and why do see so many of them for sale ??? Ummmmm.....