[FrozenGecko]

I have a HiFiman EF2 and tonight I was noticing a pretty loud white noise even when I wasn't listening to anything. I made sure the connections were good for the USB and headphones, that still didn't fix it. I decided to change the tubes. I have 5 Raytheon 6AK5's I bought off ebay, so I swapped em with some I wasn't using and the noise went away, does this mean that those tubes that I was using were going bad?

 

[BigTony]

Most likely - if the tubes are noisey they 'might' quieten down after a few hours of use - but if that fails then the tubes are headed for the dump.

 

[Skylab]

Those Raytheons are much better than the stock tubes anyway

 

[FrozenGecko]

oh I know skylab

I learned about em through HeadphoneAddict, he bought them from you from what he said =p

I put about 50 hours on em and out of the blue the fuzz started, is it likely it will go away if I use em a bit?

 

[Skylab]

So it's the Raytheons you got from EBay that are noisy? That's a bummer. They might quiet down with use, but they may just be bad.

 

[mrarroyo]

Give them 100 hours and if still noisy, well out they go. Thankfully they do not cost a lot of money.