I've had this receiver since my high school days... it has been my trusty workhorse for over 30 years, and now I've gone and done something I don't know how to undo!
Recently I picked up a Polk Audio PSW505 powered subwoofer. Since this receiver has no "sub-out" connection in back but does have A and speaker B outputs, I tried hooking up the sub using the two channel speaker option, per the sub's owner's manual (attached photo) but using "front" speakers only, since I don't have rear speakers.
After setting this up, the stereo started shutting itself off within a few seconds of trying to play music. When I powered it on, it would shut off again.
So then I disconnected the sub and went back to my earlier configuration, just using the R/L speaker A connections, and the problem persists. Only now, it shuts itself off after a few seconds of play time, then shuts back on again, etc.
What have I done to my beloved old receiver?
Any suggestions to remedy the situation?
Thanks in advance!
Rear Panel - Yamaha RX-700U Owner's Manual [Page 8] | ManualsLib
Eric
Recently I picked up a Polk Audio PSW505 powered subwoofer. Since this receiver has no "sub-out" connection in back but does have A and speaker B outputs, I tried hooking up the sub using the two channel speaker option, per the sub's owner's manual (attached photo) but using "front" speakers only, since I don't have rear speakers.
After setting this up, the stereo started shutting itself off within a few seconds of trying to play music. When I powered it on, it would shut off again.
So then I disconnected the sub and went back to my earlier configuration, just using the R/L speaker A connections, and the problem persists. Only now, it shuts itself off after a few seconds of play time, then shuts back on again, etc.
What have I done to my beloved old receiver?
Any suggestions to remedy the situation?
Thanks in advance!
Rear Panel - Yamaha RX-700U Owner's Manual [Page 8] | ManualsLib
Eric
An externally hosted image should be here but it was not working when we last tested it.
Difficult to say without some diagnosis on the unit.
Did find the manual for the sub, strange it shows the receiver connects to "speaker level output" and the speakers connect to "speaker level input" which seems back to front.
Is this the first time you have changed connections to the Yamaha unit for a while?
It is old so maybe it was heading towards this fault before and moving it/changing connections just pushed it over the edge.
Did find the manual for the sub, strange it shows the receiver connects to "speaker level output" and the speakers connect to "speaker level input" which seems back to front.
Is this the first time you have changed connections to the Yamaha unit for a while?
It is old so maybe it was heading towards this fault before and moving it/changing connections just pushed it over the edge.
Thanks for responding!
Yes, I simply undid the speaker setup using the sub and reconnected the same pair of speakers to A left/right in the rear of the unit.
Perhaps the 65 wstts RMS supplied by the Yamaha were insufficient to power the polk sub unit and, once it tripped something inside the Yamaha it needs to be reset?
Shoot, I don't know. I'm so bummed, since this is my first stereo unit!
Yes, I simply undid the speaker setup using the sub and reconnected the same pair of speakers to A left/right in the rear of the unit.
Perhaps the 65 wstts RMS supplied by the Yamaha were insufficient to power the polk sub unit and, once it tripped something inside the Yamaha it needs to be reset?
Shoot, I don't know. I'm so bummed, since this is my first stereo unit!
The Yamaha needs some servicing after 30+ years, they all do.
Don't be "bummed", you certainly wouldn't expect a car to run for 30 years without some kind of service, would you.
Same applies to vintage stereo, though most people seem to foolishly think otherwise.
Don't be "bummed", you certainly wouldn't expect a car to run for 30 years without some kind of service, would you.
Same applies to vintage stereo, though most people seem to foolishly think otherwise.
Well that makes sense. But the timing of this issue leads me to believe it was the connection to the sub that was the trigger. Oh well, no crying over spilled milk. I'll reach out to Yamaha, and/or look for a repairman.
If I got this right you connected the receiver,s power amp speaker output to the powered subwoofer,s LINE LEVEL input --correct ?
I am looking at the subs instruction manual and it does say---LINE level input and you are wondering why it blew ?
Please tell me I am wrong ?
I am looking at the subs instruction manual and it does say---LINE level input and you are wondering why it blew ?
Please tell me I am wrong ?
I connected using speaker level inputs/outputs, shown in the per option 2 from the polk audio psw505 manual. But I only had one pair of speakers to route through the sub.
An externally hosted image should be here but it was not working when we last tested it.
The diagram is incorrect. That's okay because the back of the woofer doesn't look like the manual shows anyway. Do it the way it tells in the description. That is the correct way.
Also, attach your pics directly to the forum or some will not be able to open them. After hitting Post Reply, go down to Manage Attachments. After you have attached them, expand the window until you see Upload and after that hit Post Reply or Save Changes.
Also, attach your pics directly to the forum or some will not be able to open them. After hitting Post Reply, go down to Manage Attachments. After you have attached them, expand the window until you see Upload and after that hit Post Reply or Save Changes.