How to protect my amp without changing the sound?

Here is an interesting video on SPD protection presented by Current Technology.

Part one

Part two

Disclaimer, I am not associated in anyway with Current Technology and do not have any first hand experience with their products.

I do know MOVs can and do fail under the conditions represented in the video presentation by Current Technology.
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Jim

Thankyou Kijanki, very helpful and interesting, do you get any better sound with your system useing this siemens surge arrester with this ground scheme?

No, I could not detect any difference with arrester. Furman with its tight, strong, non-sacrificial under/overvoltage protection and build in circuit breaker is probably enough but double protection sounds better. In addition I've already lost garage door opener (Chamberlain) due to the voltage spike. Chamberlain service lady explained to me, that during winter spikes are very common, recommended local Chamberlain protector and sent me brand new circuit board under warranty. This event proved that voltage spikes are common and dangerous even without thunderstorm.

You may want to do some research on Environmental Potentials products. I ended up purchasing a EP-2500 Waveform Corrector and a EP-2775 Ground Filter. These items are not cheap and require an electrician to install. However, when comparing the risk of loosing nearly $200,000 of equipment, what's another couple thousand?

Check the Audiogon archives and you will find quite a bit of discussion on their products. After I had the EP-2500 & EP-2775 installed, I could not detect any difference in the sound of my audio system, or in the picture quality of the projection system (thank God!).

Here's an interesting youtube link you may want to watch:

https://video.search.yahoo.com/video/play;_ylt=AwrTcdU5mpNUVbEACUUPxQt.;_ylu=X3oDMTBsOXB2YTRjBHNlYwNzYwRjb2xvA2dxMQR2dGlkAw--?p=ENVIRONMENTAL+POTENTIALS+youtube&tnr=21&vid=EBCBFAE3D09161E52A29EBCBFAE3D09161E52A29&l=272&turl=http%3A%2F%2Fts4.mm.bing.net%2Fth%3Fid%3DUN.608056142745044051%26pid%3D15.1&rurl=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D7SnyGCeju34&sigr=11aupo1lk&tt=b&tit=Environmental+Potentials+|+An+overview+from+Border+States&sigt=11plqnl22&back=https%3A%2F%2Fsearch.yahoo.com%2Fyhs%2Fsearch%3Fp%3DENVIRONMENTAL%2BPOTENTIALS%2Butube%26ei%3DUTF-8%26hsimp%3Dyhs-001%26hspart%3Dmozilla&sigb=13a16vl3h&hspart=mozilla&hsimp=yhs-001

Good luck on your search!
Ken G.

KiJanki, Do you mind me asking where you live?, I do not get power spikes like that here in Mobile,Al U.S.A., once in awhile, we may loose power on a sunny day, nothing has ever been damaged though, likly because I keep my equipment un-pluged when not in use, once the dropped power happened when my system was on, when the power come right back on, my amp simply was on stand-by instead of full power on, digital was simply off, all turned out good.