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I have a konzert amplifier av-502 that has two burnt resistor r130r and r130l. could you please let me know the value of the said resistor thank you very much.

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  • Anonymous Mar 14, 2014

    distorted left chanel

  • Anonymous Mar 15, 2014

    no audio and sound humming

  • Anonymous Mar 15, 2014

    no audio but thiers a sound humming

  • Anonymous Mar 28, 2014

    no mic voice



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Is it the resistors near the relay? that would be 10 ohms. You may replace it with a higher wattage (like say 5 watts)

Posted on Oct 05, 2010

  • 2 more comments 
  • bryan Sep 01, 2013

    yes that would be 10 ohms and it is printed in the PCB beneath those resistors..the original wattage rating is 1/2 watt, but you can replace with a higher wattage rating.

  • arjay bangayan
    arjay bangayan Nov 19, 2013

    the resistor near the relay 2 resistor are the value the same

  • edgardo fabricante
    edgardo fabricante Dec 18, 2013

    thanks sir for your giving me a chance to solve my problem about pre amps.

  • Cristopher Bunyi Jul 31, 2018

    What is the use of this 2 resistors? Is it for microphones audio?



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SIR,,i have konzert av 302 no sond but there is power please help thanks

There can many causes. You may have an amplifier damaged, power supply issue, on and on. If you are interested in having your Konzert repaired, please visit my website at You may contact me there.

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How to upgrade konzert av 502 av

poor soldering is the likely cause of your problem

forget trying to get more power out of it - it is built to a design,, if you want more power, upgrade to a more powerful unit

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Konzert amplifier av 502 schematic

If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts. Surf the site with patience.

Apr 11, 2014 | Audio Players & Recorders

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What would be the probable cause of my konzert amplifier av-502 after replacing 2 power transistors npn & pnp in the left channel, the sound is distorted. i'ved checked the voltage across the spea

Check the bias resistors. They can burn out when power amp transistors fail. They will be very near to those two replacements. You can compare any parts using the right channel as a good. Readings and voltage measurements should be the same for both channels. Also the look of the parts. If a resistor is off-colour in the left, but not in the right you know something is up.

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Konzert 502

Change pre drivers and drivers also change outputs emitter resistors, 0.33, 0.22, or 0.47 ect

Jul 01, 2013 | Audio Players & Recorders

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pls check burnt resistors, if ceramic it's value is .25 0hms 5 watts, if big carbon film resistor it's value is 10 ohms 3 watts. check also power transistors A1941 & C5198. also check driver transistor A940 & C2073

Jan 06, 2013 | Car Audio & Video

1 Answer

I have a konzert 302, just the other day I was wondering why the left speaker sound is disorted and very scratchy. I Thought it was only my speakers but I check and found out it was from the left chan

If you intend to DIY , check for possible cold solder joints,

leaky transistors , changed-value resistor.

Upgrade to 502 it is better than the one you have.

Aug 02, 2012 | Audio Players & Recorders

1 Answer

What is the specs of konzert av-502 amplifier

input voltage: 220vac
500 watts /channel
5 channel output
pro logic surround decoder
single output digital delay
w/ karaoke function

Aug 08, 2011 | Car Audio & Video

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How can i upgrade my av 302 to becomes best as konzert av-502

upgrade your 302 to 502 need to replaced the toroid transformer, set of output amplifier, set of electrolytic capacitor.
Purchasing of these parts one-by-one is much expensive rather that you buy a brad new Konzert AV-502. Also upgrading the unit is quite tech and need a lot of experienced in electronics.
Hope that it may help you.
Have a nice day.

Jan 31, 2011 | Audio Players & Recorders

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