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Hi, Just installed a new RTP202 amplifier connected to a Pioneer 10 inch TS-SW104D speaker that is rated at 250 Watts nominal/1000 Watts Max music power. (4 ohm) The only noise coming from the speaker, regardless of the head unit or amp gains settings, is a low rumble. -Measured 12 V to amp -Zero ohms from amp ground to battery negative terminal -Remote turn on voltage is around 10 V from the Alpine CDE-9981 receiver but amp light turns on. -RCA connectors from head unit to amp are correct polarity. Thanks, Gary King -

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Possibly low on supply or it was not compatible amp for the device.

Posted on Mar 09, 2008

  • micromaster
    micromaster Mar 09, 2008

    Have you try switching all the wires from others?



    Did you try to test other speaker?

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  • Master
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HELLO SIR

Posted on Mar 09, 2008

  • dewan nafees ahmed Mar 09, 2008

    THERE IS A SHORTING BETWEEN TWO WIRES SOMEWHERE IN THE UNIT OR THE SET UP

    THIS IS TO CLEARED TO REMOVE THE PROBLEM

    THANK YOU SIR

    GOOD LUCK

    DONT FORGET TO RATE THE SOLUTION

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hi,
First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the overload (protect) show or not . if not, then any of the speaker is damaged or you have to check the impedence of your receiver and speakers. It will be written on the rear side of both receiver and speakers in ohms. PIONEER recommend to connect 8 ohms speakers in to this AV receiver. If you are using 6 ohms speakers you have to do some setting in the AV receiver.For that do the following

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You have to check the amplifier.
for that you need digital multimeter,soledring iron screwdrivers etc
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after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
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After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
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I know that this post is long outdated, but I came across it and had to post.  Sorry, but the solution posted by nfanres is not correct.  Just because the KLH speakers are rated at 250W does NOT mean that they will always pull that much from the receiver.  That is just a manufacturer rating saying that they recommend supplying a max of 250W to the speakers.  The reason your receiver says "Overload" is most likely due to the subwoofer being an improper impedance for the receiver, causing the receiver to see a lower resistance in the load, and thus outputting too much power.  I could go into a detailed explanation as to why with Ohm's Law, but just suffice it to say that if you decrease the resistance, current will increase, thus the overloading (too much current draw for the receiver).
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