My set up for now

I switched to the AQ Dragon for the interconnects and found a noticeable improvement

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I have never seen it on a msb produkt or other produkts in the Nordic but there is a first time for all.

Best

Henrik

Peter
Thanks looking forward to mine arriving later this week!

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Daniel
I have a video of what is happening via stromtank. Please confirm that it is you described and not a concern. Thanks!

Will remove after you see it

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Henrik
Thx, this only happens on the Msb s500 not my last 2 amps

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Most amps will not care if the mains voltage overvoltages and damages them. We ship amps all over the world with sometimes outrageous electrical grid conditions and we were getting many blown up amps. So I designed the S500 to have many ways to protect itself. First it automatically senses mains voltage and selects the correct range(105-130V or 210-260V). Next it senses the mains voltage and disconnects if the mains is out of spec. Then if the mains is out of spec for too long, or too many times in a short period of time, it turns off. As a further backup all internal power rails are monitored and will turn off the amp before the caps overvoltage, this is a slow way to sense a fault however so it’s only used as a last resort. I personally love it because it has saved the amps in our listening room many times while I was using them. In California here we get many electrical grid events that blow up equipment and the amps simply shut off without any damage. Some customers have even gotten their utilities to fix major errors (and pay for blown up equipment) in their local grid after our amps kept shutting down prompting them to monitor their mains power.

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HI Dustin,

That’s incredibly thorough!

I assume that the M500 has the same power protection. Is that correct?

Thanks,
Dan

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Yes, S202, M205, S500 and M500 all share the same protection circuitry.

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@Dustin_Symanski I can’t say thank you enough for the attention to details!

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Dustin
Thanks, sounds like what I observe is intentional as part of the extensive protections built in and i should not worry about it right?

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It’s very likely that the Stromtank is not nice to the the power when it is switching and is putting a huge spike on it, possibly aggravated by wiring in your house and the amp is seeing that and saying “hey I should protect myself”, but the fault was not long enough (probably just a single spike) for the amp to turn off completely. Without monitoring your power directly this is not conclusive but is highly likely (90%+).

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I second what @Dustin_Symanski is saying. Unless other symptoms start showing, I would not worry in the slightest.

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Thx guys!!!

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When you start the Stromtank up it have to be on the grid and then you can go over to the battery mode-

Best
Henrik