sony xa9000es problems

my 9000 makes a loud feedback type sound when hooked up to my rotel 1098 but not when hooked to my mf preamp. the rotel has no problems with an arcam 7se or a sony ce775. my cables are good jps and tara labs. so what is the problem.
Doubt that the problem stems from your Sony player if it only crops up with the Rotel.