Originally Posted By: Gardemark


Btw, both of our old power amps (Crown 600W) has a DC protection circuit cutting the output to protect the speakers. I think that the latest technology in these EV also has such system.

Aulis G


The EVs have DC protection circuitry as well.

A clipped waveform cannot always be detected by the DC protection circuitry though, because it is not in the ON state long enough to be detected as DC. If we design the protection stage such that it is that sensitive, it would be kicking in during the music performance and thus cutting out the sound.

I think you should contact EV directly on this as an unsatisfied customer, politely, without accusation, explain concisely the situation and ask them what they can do to alleviate your situation, perhaps reimbursement, of course, these issues also depend upon the laws concerning warranty and those do differ from country to country. I am really only familiar with the US warranty regulations.

There can indeed be circuit fault situations that could lead to the observation of a burned tweeter coil and a technician could make the erroneous assumption that the situation could be due to abuse when it in reality was due to circuit fault.

Here in the US, working at the test bench for various mfr's, we typically have to give the customer the benefit of the doubt, replacing components under warranty regardless of what we lowly repair technicians think may have been the reason for failure. That is in large part due to the Moss-Magnuson Act, which is a Federal Law situation, passed back in the 70s as Consumer Protection. Check the legal situation in your country about such things before contacting manufacturers for redress possibilities.


--Mac

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