My system exhibits two low frequency problems, and I'm not sure what's causing them or who to turn to for assistance. (The setup: Mac Mini > Ayre QB-9 > Bel Canto S300iu > Revel Studio2)
First and foremost, the sound is quite lean, as if there were small monitors instead of full range speakers. I'm not sure if this is an issue with the speakers themselves (they were demos), the room (always an influence, often major), or the amp (great, but underpowered for the application -- I can afford to upgrade in stages only).
In addition, at moderate volumes, test tones (e.g. from Stereophile's Test CD) below 30Hz or so cause an audible rattle from the speakers. I can't hear it while playing music, but this still worries me.
I got these components over time, from different locations, so there's no one dealer in the picture. Should I call a local store and ask them for an in house consulation (for a fee, of course), or look for a repair shop to do the same? Or should I ask some local audiophiles for their thoughts first (for beer/wine/liquor/eternal thanks)?