Hello all, I recently got an F serial 8000S from eBay, but only yesterday powered it up to check the functionality out of curiosity/boredom (haven't bought the speakers yet). Anyway.... is the volume motor on all these Amps audible, or do I have a faulty unit? I have vaguely heard of a fault on some of these models - 'crackling' volume change, but this does not seem to be the same, as I said I didn't have any speakers connected. So, is this normal? My only limited experience prior to this has been with AV Amps, and all their volume motors were totally silent. Many thanks in advance for any info.