Any high resolution Rush. Solar Wind, Mix it Up, Chick Correa Trio, among others. I will try to add them as I listen to them. People talk about the hd650s being so warm, but I think they are really quite a neutral on the Bottlehead Crack.
I mostly listen to binaural plus recordings, people like Amber Rubarth and Noah Wall but one of my favorite standard recordings is Warren Zevon's Nighttime at the Switching Yard and Brubeck's Time Out album. Another binaural favorite is Rebecca Pigeon's Spanish Harlem. I recently discovered Tidal so through there I often play The Beast in Me by Nick Lowe and Lake Street Dive's I want you Back.
I generally have two amps hooked up with different headphones, the Crack with HD 650's and a balanced setup using two solid state amps with another set of headphones, the warmth of the Crack always draws me back and I spend more time listening to it.
Guys, you have this backwards. If you tap on the tube and it rings, that is microphonics. If the tube starts to sing without any mechanical impulse like tapping - and tapping it stops the singing - that is not microphonics, it is an oscillation due to something electrical. First thing to try is thoroughly cleaning the tube pins.
Guys, you have this backwards. If you tap on the tube and it rings, that is microphonics. If the tube starts to sing without any mechanical impulse like tapping - and tapping it stops the singing - that is not microphonics, it is an oscillation due to something electrical. First thing to try is thoroughly cleaning the tube pins.
I'm saying clean the pins on the tube. The tube socket contacts are probably fine. Sometimes you can clear up oscillation by simply inserting and removing the tube from the socket a few times, which scrapes the pins a little bit. But I usually clean them with DeOxit or even a little fine sandpaper. To really do them up you can chuck up half a Q-tip in a Dremel tool and buff the pins with some metal polish. That's what I do with critical stuff like recording gear.
I'm saying clean the pins on the tube. The tube socket contacts are probably fine. Sometimes you can clear up oscillation by simply inserting and removing the tube from the socket a few times, which scrapes the pins a little bit. But I usually clean them with DeOxit or even a little fine sandpaper. To really do them up you can chuck up half a Q-tip in a Dremel tool and buff the pins with some metal polish. That's what I do with critical stuff like recording gear.
On my RCA 12AU7A, there is a dark circle inside the glass surrounded with a lighter colored charcoal/white color. Could this have anything to do with low-level ring?
*****UPDATE***** I cleaned the pins with wet/dry sandpaper, 1500 fine grit until they shined and it seems like any ringing is probably just my ears. Actually, now there isn't any ringing. I was also able to get a mini cleaning pick into the sockets for the output tube and they were pure black dirty.
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