Can't find a manual for the beta 600, but based on the pictures it looks like it is capable of doing nearly everything. There are two processor loops. The big questions is how extensive the switching is. If you don't use the ATD-1 or the equalizer for recording, it looks like you can run them both through the processor loops. If you use them to record, the switching may not work correctly - depends on whether or not the processor loop can be inserted before the tape monitor switching. It looks like putting the processor on source will process the signal before the tape circuits, but not clear if that is for both. (if it is only one, normal usage is to put the EQ in that processor slot). And it's not clear which processor it goes through first, if both processors are selected, but that is what the manual is for. Time for some experimenting, (and some patience). FWIW if you only using one tape deck, I would hook up the EQ through the second set of tape inputs, and the ATD through one of the processor loops. Then use the dubbing function to either eq the recording or EQ the playback. A lot depends on how exactly the processor loops are switched and wired. Good luck with it.
