My Sony receiver keeps displaying "Protect" whenever I turn the volume louder than 45. The speakers I have are very big and can support much louder sound than my receiver is putting out. What do I do?

I got "protect" when configuring my Sony. I'd hooked up one of the speakers wrong polarity.

You don't say which Sony you have, but there may be an option in the menu system to customize your speaker settings. It might think your speakers are small if you also have a sub. A quick search of the online PDF manual for my receiver says that Protector is activated when it detects a short circuit in one or more speaker. I would double check all your speaker cables/hookups.

need info

what speakers and how many?

what recvr?

sounds like either a blown driver or dying power supply in the rcvr OR stray wires shorting at either the rcvr end or spkr end

make sure the speakers you are using are 8 ohm...also Sony receivers have always been known to be limited on power output compared to their ratings...it is also highly likely that a frayed wire somewhere is shorting out when you get x (45) level of power running though it (the wires may not be touching, but once enough power is being run it creates an arch and shorts out causing the amp to go into protect).

and as always list the model numbers you are working with.

Lemme see here...hmmmm.

Sony "Protect." Yes, likely due to a speaker wire short.

Are you the same person who has bought equipment to run 1800 watts of audio out to one pair of speakers to cover some 15,000 square feet? If so, I humbly suggest that if a Sony amp goes into Protect mode under your care, you hire a pro for that job, as several people have recommended.

Hey Mike, How many watts per channel does your Sony have? What is the brand & model number of your speakers? How old? Are they 8 ohm speakers?What kind of wire are you using? How long? What is the gauge? Sorry for all the questions, but its important to narrowing it down.
If your Speakers are 4 ohm, this could be the problem. Of course, wiring problems or shorts could certainly cause it. Are your Speakers efficient? ( how much power is necessary to drive them?). When you crank it to +45, you are in he upper range of what power your receiver can put out. More speakers are damaged by amps that do not have enough power then too much power. When the amp runs out of power (at peak nano seconds;) especially bass, the amp goes into clipping. Clipping causes speakers to blow, amps to blow, etc.

my reciver did the same thing with out the speakers pluged in, and its a sony STR-K660P i need to know how to fix it myself.

It's not a good thing to bring up a 7 y/o post and then start a new thread with the exact same thing.

Also, see your other post.