go to www.anomalousrecords.com and get any of the following: helmir bjorgulfsson "the opposite" (3" cd) or "discreet journey" (same artist) or toshio tsunoda's "field recordings". Mind you, this is strange, experimental, electronic music (in the 1st 2) and oddball recordings of standing waves - but the stuff goes down to the bottom of subwoofer territory. My whole house shakes when I play it!