An earlier post on "SDA SRS 4.1TL Upgrade" mentioned something about recessed vocals but maybe I misunderstood. I'm not sure if I want to bring the soundstage forward but the additional clarity and bass response sounds tempting. The crossover mod associated with this sounds easy but I'd have to buy $100 of tweeters to replace the $100 of tweeters I just bought. At least there's only two!!