My old PowerBook G4 12" actually has better speakers (to my ears) with more bass than my MacBook Pro 15.4".  What gives?  That, in my opinion, is one of Apple's greatest failings.  Built-in speaker quality should be near the top of the list pf priorities during the design process for a company so focused on aubible media.

For the record, I hated the iMac Rev. B speakers.
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Cheers! :-)
- JediJoker

Current:
- "ProBook:" 15.4" MacBook Pro Core 2 Duo 2.33 GHz
- Mac Classic II
- Old PowerBook

Moved On:
- "The Book of Power:" 12.1" PowerBook G4 Aluminum 1.33 GHz
- Purple iMac