Svedkadrpepper Posted August 5, 2023 Share Posted August 5, 2023 I have a pair of RF-7-III with an RC-64-III for my front sound stage, I forget exactly what my side and rear surrounds are. Anyway, yesterday I was watching the dark night and the receiver displayed check speaker cable and shut off. I turned it back on, and it did not do it again and I didn't change anything else. Looking online makes it sound like a short circuit somewhere , but there is no damaged part of wire and I'm using banana plugs, so no wires are touching. I was watching at reference volume though and I've heard that the RF 73 have a very low impedance dip at certain frequencies and volumes. Could this be the issue? The receiver is a Yamaha a 2080. Quote Link to comment Share on other sites More sharing options...
Zen Traveler Posted August 5, 2023 Share Posted August 5, 2023 20 minutes ago, Svedkadrpepper said: I was watching at reference volume though and I've heard that the RF 73 have a very low impedance dip at certain frequencies and volumes. Could this be the issue? The receiver is a Yamaha a 2080. It could be. Check your service manual where it tells you how to connect your speakers and see if it says if you can connect 4ohm speakers ( on Denon models it's where that info is). Quote Link to comment Share on other sites More sharing options...
Peter P. Posted August 5, 2023 Share Posted August 5, 2023 I'll hazard a guess and suggest one of your channels' output transistors is beginning to short out. Or, if your speaker cables are running in an attic or wall, something has chewed on the wiring. If it were an open circuit issue it would be easy to prove; just disconnect one speaker and see if any message displays. What you can do is turn off your system and disconnect each speaker one at a time so you don't lose track of which wire goes where. Using a volt meter, measure the resistance of each pair of wires with the speaker attached. You should read something close to the speaker's rated impedance (4, 6, or 8 ohms perhaps), plus a little bit for the wire resistance. By comparing all the speakers' readings, you might find one unusually low or high. 1 Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted August 5, 2023 Share Posted August 5, 2023 Try using bare wire instead of the banana plugs. They offer the best signal path anyway. 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted August 5, 2023 Share Posted August 5, 2023 4 hours ago, Svedkadrpepper said: the receiver displayed check speaker cable and shut off. check the banana plugs , tighten all screws Quote Link to comment Share on other sites More sharing options...
billybob Posted August 6, 2023 Share Posted August 6, 2023 Thing is, If you come back to read this @Svedkadrpepper ... alert may not happen again. If so. Would clean plugs with contact spray cleaner or a touch of alcohol, while wet run it into speaker plug connector. Just abit of invisible to the eye corrosion could cause anomaly. Welcome... cool. Quote Link to comment Share on other sites More sharing options...
Svedkadrpepper Posted August 6, 2023 Author Share Posted August 6, 2023 On 8/5/2023 at 2:14 PM, Zen Traveler said: It could be. Check your service manual where it tells you how to connect your speakers and see if it says if you can connect 4ohm speakers ( on Denon models it's where that info is). I don't have the manual anymore but a little google fu brought me to the owners thread for the avr on avsforum, and I'm 99% sure now this was a case of asking an amplifier to do too much. 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted August 6, 2023 Share Posted August 6, 2023 1 hour ago, Svedkadrpepper said: I'm 99% sure now this was a case of asking an amplifier to do too much. the RF-7 III's have a 250 wpc rating @8 Ohms , in Stereo . 2ch driven the RX-A2080 only delivers 140 wpc @8 Ohms , Quote Link to comment Share on other sites More sharing options...
Ceptorman Posted August 6, 2023 Share Posted August 6, 2023 Even hi powered AVRs will run out of steam pushing power hungry speakers. Be careful, clipping can damage your speakers. Quote Link to comment Share on other sites More sharing options...
opnly bafld Posted August 7, 2023 Share Posted August 7, 2023 3 hours ago, Svedkadrpepper said: I don't have the manual anymore Available on Yamaha.com and Crutchfield. Quote Link to comment Share on other sites More sharing options...
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