"The Presonus ADL 600 is a hand-made, high voltage Class A, two channel tube microphone preamplifier designed by world-renown tube circuit designer Anthony DeMaria."
Well, the first problem is that Anthony did not design the ADL 1000 nor did he design the version of their tube DI that was so popular. The second problem, as far as I'm concerned, is that my experience with Presonus gear so far has left them firmly in the 'prosumer' category. I don't expect to see this popping up in serious recording studios, if the quality of the eight channel pre I used is any indication.