I have run 150w into my dx1600 from my 2990DX with no problems, has toshibas in it, just keep it cool.
When well known builder/operators tell me they have never hit their 16 pill toshiba amps with more than a 100w dk theres good reasons and I paid attention.I’m sure a lot of folks do. For me the juice isn’t worth the squeeze; you know how the saying goes. They do what I need to do driven at baby levels and do it quite well. Of course...I’m not lucky enough to have Toshibas, at least in this amp.
I’d love to see someone do an power in/power out chart, say from 40-150 watts, for the 1600. I know there’s a point of very diminishing returns in there somewhere, and I tend to think it would be well south of 150w.
The squeeze is definitely not worth the juice.