I don't know if this is useful in your situation but I used to have a pair of older Monitor Audio 4-ohm speakers that worked quite well with a Parasound amp. When I switched speakers I sold the Monitor Audio's to a friend who planned to use them in his new house.
When he hooked them up to his inexpensive multichannel receiver it almost immediately shut down every time he turned it on. Fortunately, the receiver had an overload protection circuit. I went over to have a look and noticed he was using 18 gauge lamp cord for speaker cable. When we replaced it with the same 12 gauge cable I had been using it worked fine and he's still using the combination several years later. The speakers were just pulling too much juice through too small a wire and the resistance was causing major overheating.
When he hooked them up to his inexpensive multichannel receiver it almost immediately shut down every time he turned it on. Fortunately, the receiver had an overload protection circuit. I went over to have a look and noticed he was using 18 gauge lamp cord for speaker cable. When we replaced it with the same 12 gauge cable I had been using it worked fine and he's still using the combination several years later. The speakers were just pulling too much juice through too small a wire and the resistance was causing major overheating.