Hi, I bought M-Audios AV30 A couple of years ago.Must say I was pleases with the product but recently they started to make a rustling sound, mostly coming from the left speaker. How can this be fixed? or is it a default with the product.

Could I get a free replacement

Please some one help I feel lost with out my monitors.

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I've fixed more power monitors than I care to think about. The rustling sound you described can have several sources...power resistors at the output, the chip-amp itself beginning to fail, bad capacitors in the voltage regulator circuit (or bad decoupling at the chip-amp), or, in one case I remember, a section of the circuit trace itself that had become resistive...the noise went away when I bypassed it with a wire!

How comfortable are you with troubleshooting? I don't know if you can get a free replacement, but a competent tech ought to be able to bust this noise with a little scope-work.

 

(Also, you can just open it and visually inspect the electrolytic capacitors...if they're bulging, leaking, or blown to bits, you've probably found the problem!)

 

Failing solder joints. Check with a strong light and good magnifier any solder joints on the PCB that carry power (larger tracks and power components) or show signs of heat and discolouring.

Then re-solder.