I believe that Hafler was also part of Acrosound before Dynaco. The little Acrosound 20/20 is still highly sought after as is the ulralinear monoblocks. I think that this was his company before Dynaco.
The passing of another legend...
I don't know if this thread has already started somewhere else, but I just read that on 5/25/03, David Hafler passed away. I am sad. The Hafler DH200 was my first venture into high-end and since Hafler catered to the "budget-minded", this little amplifier carried me through tough times in college and beyond. This little amplifier, mated with my Vandersteen 2B's, gave me many, many hours of pleasurable listening. Thank you David Hafler for giving all the poor folks (like myself back then) a little taste of high end. You will be missed.