For a while, until I got things tuned in, "Fear Of A Blank Planet" by Porcupine Tree fell flat in the dynamics department on my new OHM Walsh F5 speakers compared to my 35 year old custom modded OHm L bookshelf speakers (on stands), which were filling in prior to the arrival of the new speakers. Turns out the amp (and pre-amp) I had at the time was up to snuff for the smaller Ls but not the big F5s. An amp upgrade to my current BEl Canto Ref1000m monoblocks after an earlier pre-amp upgrade to my current ARC tube pre-amp solved the problem.