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I have feed back thru speakers when volume is turned up on my 1967 rock olla ultra juke box

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Hi, you may adjust the treble control it cause feed back to the speakers.



hope it may help you,


regards

Posted on Sep 11, 2008

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This indicates an output load problem, turn receiver off! remove speaker wires from the back of the unit, power on and turn the volume right down, if the word protect stays off it means there is a short in the speaker wires or one or more of the speakers. Now! if the word protect comes back on with "speakers and wires dis-connected" it indicates a short in the audio output ic's, this will require a tech to find out how many channels have been compromised and cost involved.

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Are you trying to kill it? A device has only so many emergency shut-offs it can withstand.

How are the spaces around the top, underside and back for ventilation?

0 dB isn't normally 'normal' volume.

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Hi . I have a Kenwood receiver V-3080 that on start up it comes on for a few sec. the turns off like you switched it off then after several time it stays on without any further problems.


The wiring of a speaker has back feed to a safety shut off because a wire is touching or the polarity has been switched. The volume may be turned up to high to and will cause it to do the same. It is an overload feature, so that you don't blow your speakers with a 100 watts of power surging to it. Changing positive to negitive of the speakerswire to speaker may help.

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The most common problem found on FixYa for Audio Video2_bing.gif Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

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try this site very hepfull if you can find all the speakers spec's.http://www.ajdesigner.com/speaker/ajvented.php . if you have the latest pioneer speakers they were designed for small enclosures if you imput speaker code in to google search you should find all the details you need .

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When the level of the music gets over 40db the unit stops playing so i have to turn the volume button at a very low level to avoid kicking off. the problem started when my little sister managed to reach...


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Firstly i would disconnect all speakers and turn amp up if still does it then there is an overload in amplifier anbd needs to be repaired..

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Need help


Have you connected an extra pair of speakers?. (Thereby loading the amp stage beyond it's capacity)
Are the speakers connected to the unit the original ones the system came with or different? ( Speaker impedance, usually displayed at the back of the speaker cabinet must not be less than amp's specifications....6 ohms, 8 ohms)
If you're driving the unit excessively you're lucky this piece is equipped with protect mode, else your speakers and amp would have been fried by now.
One last possibility comes to mind: High volume causes vibration causing loosely fitted mains plug to rattle in wall socket calling "protect" due to improper feed voltage. Move the unit to another wall socket and ensure a tight fit into mains receptacle.

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