I know this isn't the kind of Speakers you're talking about...
...but when I found out that The Marine Band is giving us the opportunity to burn our own copies of their performances, I thought I'd share the link here.
OK, now who's bringing their CD players with big speakers? I'll burn copies of the CD so we can have a line of them along the parade route of the Socialist Workers Party/IWW/North Korea Defense League/Communist Party, USA/American Muslim Jihadis/ yadayadayada...
Maybe some bullhorns.