Hmmm, I guess I feel into hearsay tonight, but I have an audiophile buddy who swears it's the fastest, cleanest music sub he's heard. Again, haven't heard it, but he swears by it. He's auditioned a lot of high-end subs, but not the ones I'm familiar with. NHT Evolution and Genesis are good ones too. I like acoustic suspension and/or servo. The Thunderbolt is neither, but it comes well-recommended.