I give you DBX Subharmonic Synthesizer , or as a friend put it , " I want to splater the neibors cat against the wall , thru the wall !!!!!"
The ONLY stereo component that I have EVER seen with a health warning sticker , I beleve it went something like this " If you have a heart condition , This stereo component can cause your heart to match beats with the music !!!!" or sum such
http://www.dbxpro.com/120A.htm