About 3 weeks ago my Right Front Polk Audio R50 took a great tumble and was knocked over rather hard. AT first it was working fine and everything. However, it started to be spotty and work sometimes, and other times not at all. I attributed it could be the fall. But today my Left Front Polk Audio R50 stopped working. I thought it was weird, and since the wife was the one who knocked over the Right one, I thought she may have switched them so I wouldn't notice the right side not working sometimes. Well, WHen I tried with the connections on the back, it turned off my Onkyo 876. I use Banana plugs for my connections, and have an idea it may be one problem. And now my Onkyo is blinking the Standby light on the front, and won't stay on.
Any ideas?
Also, last night my fuse box got tripped and had to reset the fuse for that section, could that be a possibility? I have a surge protector for the Stereo and rest of the equipment
It is completely normal for a speaker rated for 8 ohms to read resistance of 4 ohms or less. Impedance is a much more complex value, composed of the resistance, inductive reactance, and capacitive reactance of the speaker system. Impedance is not one value, but changes across frequency.
Your problem was likely that you had the amp set for higher impedance and had it bridged at the same time. Over time you likely just cooked it. I have never been a fan of bridging most products anyway, and in a receiver, it is likely a bad idea.
Just use it without bridging, give it better ventilation, and note the temperature. If it gets too hot to comfortably put your hand on the top and keep it there, you likely have a problem. Be very careful about your connections to the speakers and be sure that you have no strands misplaced that might cause a short. I doubt that this last suggestion was a problem because you did not trigger the protection in the amp. The fact that it cooked the board indicates operating the unit just below where the thermal protection would activate for a long time, i.e. a marginal application.
Thanks for the help. Gonna try hooking it up this weekend again.
Guess i have to realize that the days are long gone where things were built tough and simple. These things are just more complex and fragile. Growing up i remember messing around with my dads Sansui receiver trying to get many speakers connected to it. It would just shut off and you could turn it back on without a problem. The thing still works after 30yrs.
I also have to realize that car audio stuff is a little different also. Bridging in car audio is almost common place.
Well, i finally got around to hooking this thing up. After more research i'm guessing it could have been a ventiallation problem. Ended up getting a new stand to help with it.
Before i had a little over 2 inches on the top. The back of the cabinet was open. The side had very little room. I guessed it would be okay because my previous receiver i had in their had a little more room and had been in their for about 6 yrs without a problem.
These things get hot. My new cabinet is not even a cabinet anymore. It is a rack where i have it mounted on a glass shelf with openings all around. The shelf on top if it is about 4" away. The manual specifies 8":yikes:. Why don't these guys put a fan in these things.
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