I've heard several of Hirsch's pairs on several occasions. Multiple serial numbers.
I pretty much could not get them off my head fast enough. I really dislike them. They may be fine for detail freaks, but for a rocker like me, they suck. Pretty much. Out and out suck. I like my HP-2's for that better.
EDIT: okay, that's not true, I do remember once or twice liking them long enough to listen to them for a whole song or more -- 5 minutes or so. And the bass isn't gone, it's just...well, I would compare them to my Spendor S3/5's -- the bass extends, there's just a gradual roll-off. Which, now that I think about it, I loved those speakers. I don't know, maybe I ought to give them another chance...