Well, here I am responding to my own post, correcting an error...

I looked at my TSR-8, and it *does* have Accessory 1. So the ES50/51
should work fine, provided you can make the cable. Try TASCAM tech
support for help on that, they're really good about this sort of
thing. Failing that, maybe someone more in the know than I can help.

Good luck!

-GRW