Just hooked up my new Ampeg pr-410 hlf to my svt 4-pro. Wow what a combo! It has the deepest warmest sound that I have ever heard imo. With the horn turned up about half way, it has all the high end I would ever need or want. Both my jazz and my Spector sound phenominal, with minor volume and db padding for the Spector. I would highly recommend the combo. Any comments?