I need some time to get use with this baby first. Yes, I'll try to give you some of my opinion.
- 1,631 Posts. Joined 12/2011
- Location: Sunny, California
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Haven't managed to get a tester yet. But it is on my To Do list. :)
And no, not even one silver shield.... :( However, one of the grays does have closed plates, which I thought was interesting....
Bad things are happening. First of all I warn off a Grado owner from the Lyr because mine has a hum which becomes epic with the low impedance Grados - and folks chime in to say 'Hum? What hum? Our Lyrs are silent." Someone suggested that it might be the tubes - so I tube-roll (the hum is still there) and when I pick one of my preferred go-to tubes I find this:
Which should look like this:
And has been carefully kept in this:
What's going on? Some enemy hath done this.
And my Lyr hums.
Since my amp (not a Lyr) uses only one double triode as a driver, this makes me think I should try to compare the gray '75 SWP with closed plates to the open-plate version. Plus I am still working on a adapter for the Sylvania sub-minature 7963. And I recently picked up a pinched-waist E80CC and a pair of C3g/s - all ultra-linear with frame grids... An "embarrassment of riches".... . :)
I shall look up the funeral services for tubes. The hum - I've tried different interconnect and no interconnect and the hum is still there. I've also tried a different mains cable. Thank you for your question regarding the channels - I hadn't thought to check. It's more prominent in the right channel. Faint in the left channel.
I have tried the Shure EC4-N IEMs at your suggestion. Same hum. The hum is negligible with HD650 and the HD800, but too pronounced with SR-60i and the RS1i. In all HUMility, I must say that I find this far from HUMorous. As we say in the UK, I have got the HUMp. It is still there when I try the unit without socket savers. I will try it in another house, and then start looking at ground loops. Then maybe exorcism. Or voodoo. Or both.
Or I could mail Schiit.