Just bought and installed a Marantz SR7015, replacing my Onkyo TX-NR616, with no other system set up changes. Immediately, during initial AVR setup, I could hear some kind of music coming through the speakers. I listened carefully to hear what it was and eventually worked out that it's "Lyca Radio on 1458AM and DAB".....(a London based radio station, I've since discovered). I never had this type of radio interference before on the old Onkyo AVR. Neither have I experienced this on an Onkyo TX-NR656 in another room in the house, nor with a DENON AVR in the cinema room.
For reference though, I have heard this same radio station being picked up on my PC Logitech speakers much more faintly, which are in a completely different part of the house.
I've disconnected all of the inputs to the Marantz AVR (HDMI) and the output to the TV (HDMI), but nothing stops this radio station coming through all 5 of the surround system speakers (my sub has stopped working, so can't judge if it's interfering with that). This radio station being picked up is loud enough to be heard even when playing an input source through the speakers, to the point where I can't use this AVR.
Ordinarily, I wouldn't blame the amp, but given the previous one (Onkyo) didn't suffer from this, nor the other two AVRs in the house, I am wondering if it could be faulty?
I moved the mains plug to a different wall socket about a meter away from the original, but no change. Only powering off the AVR stops the radio station playing through the speakers.
I could buy a ferrite core to put around the mains lead, but is that really likely to be effective?
Appreciate any thoughts on this.
For reference though, I have heard this same radio station being picked up on my PC Logitech speakers much more faintly, which are in a completely different part of the house.
I've disconnected all of the inputs to the Marantz AVR (HDMI) and the output to the TV (HDMI), but nothing stops this radio station coming through all 5 of the surround system speakers (my sub has stopped working, so can't judge if it's interfering with that). This radio station being picked up is loud enough to be heard even when playing an input source through the speakers, to the point where I can't use this AVR.
Ordinarily, I wouldn't blame the amp, but given the previous one (Onkyo) didn't suffer from this, nor the other two AVRs in the house, I am wondering if it could be faulty?
I moved the mains plug to a different wall socket about a meter away from the original, but no change. Only powering off the AVR stops the radio station playing through the speakers.
I could buy a ferrite core to put around the mains lead, but is that really likely to be effective?
Appreciate any thoughts on this.