One thing at HE2006, regarding bass: Every room had the same "bass note." Maybe I should say node. The dreaded hotel room sound was in abundance but particularly, bass sound was uniformly compromised in the same way, and loading any of those rooms with high SPL disproportionately made the bass problems more acute.
There wasn't a single system at the show that could be considered heard optimally. But some vendors were careful to find the best possible placements in their rooms and overall I think this was the best sounding *in-hotel* exposition in a long time. Particularly good were the Verity/Nagra/Audion, and Verity/Audion/Sonic Euphoria systems in that multi-vendor room, and Zu's Definitions system, especially Sunday after further refinement of their setup mitigated a room node.
Another thing driving SPLs is that vendors are starting to use real music again, instead of audiophile dross/gloss. Rock is inching its way back in to demos. Johnny Cash was on in multiple rooms. Blues, 'Trane, John Lee Hooker, Bill Frisell, Miles, the Chets, Wilco, etc. When people are having fun, SPL tends to go up. More feeling, less analysis. How much can you analyze in a hotel room acoustic environment anyway?
Phil