Heat heat and more heat??

These amps date back quite a few years. It might be prudent albeit difficult to get them looked at for new capacitors etc.

Have you checked your electrical service? What's the voltage? What's the power factor?

I had Rowlands that got warm but never hot...never the less, if there was anything really wrong with your equipment, there are protection circuits that would shut it down.

I believe that your Rowland amp is fully balanced, and it appears that you may have a REL sub in the system which uses that amp. If so, are you connecting the sub at speaker level, and if so are you making the mistake (that is not uncommon when connecting a sub to amps that are balanced or bridged) of connecting the ground (black) wire from the sub to one of the amp's negative output terminals?

If so, I can envision a technical scenario in which that would be responsible for the problem, even if the amp didn't used to get hot under the same circumstances.

In any event, good luck with the problem. Regards,
-- Al

Al, that is very interesting. I think the amp is balanced,and I do connect the subwoofer (REL) as suggested. I will experiment with removing the sub...hopefully this will solve the heat issue. In order to connect the sub, do you know what is the correct way to do this? Thanks.