Problem with Ref 5SE


I recently purchased a 5se and took delivery the other day. Did not get a chance to open it up until last night. Upon installing it into system I switched it on and after it warmed up, I was very much interested in hearing how it sounded against my current 27. After listening to several tracks with the 27 I switched pre's and after a couple of minutes playing a CD I got some noise, almost a loud static sound coming from the right channel. It was not effected by changing volume controls or input selector. It went away after 10-15 seconds and then returned. At that point, as it was late, I shut everything down and figured I would take another look in the morning.

This morning I removed the top cover and pulled and reset the output tubes and then the power tubes. I fired it back up and still had the 'static' sound but now it also had a humm, like an impedance type hum and constant. I do not believe that the humm was present last night as it is quite noticeable. 

The static type load noise seemed to have abated after the unit warmed up after maybe 15-30 minutes.

Can I assume that perhaps a tube was damaged during shipping? Do you ARC guys think a new set of tubes will fix this issue or am I looking at something more severe? Any additional suggestions to try and pin this down?

I rerouted the IC going to the amps to get them further away from source IC's and no help...

I am a little bummed, as my initial impression it that it is a leap from the LS27, my current...
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Showing 5 responses by testpilot

I assume that you bough the 5SE used.  Did you contact the previous owner and ask him if he had the same issues?  There will always be a bit of tube rush noise coming from speakers, but nothing should be heard from the listening position. 
Can you take the 5SE to a friends or a dealer (call first) and see if you can duplicate the problem.
You think the plastic top would be cooler. I'm not shure, Anybody else got a theory?
An aluminum top will cool will dissipate the internal heat MUCH better than a plastic top.  All you need to do is look up the thermal conductivity coefficient of the material use.  Plastic acts more like an insulator whereas metal will act more like a heat sink.  If you want to increase the cooling capability of an item, build it out of copper
Send the amp back to the seller.  
Did the shipping box show signs of obvious damage?  Did you take pictures of the damage before opening the package?  Did you report the damage to the courier company ASAP?  If the answers are no to the previous questions, I’m afraid your claim will be denied.  Right now, you think that damage occurred during shipping but no physical damage can be seen. Hopefully, it will be an easy and quick fix.