Hello crack heads,
Just purchased a very clean bottlehead with the speedball upgrade, it worked beautifully with my beyer t1 and hd650, well if you forget the fact that it took roughly 10 minutes to warm up and get rid of the hummming sound in the right cup (which I'm not sure if its normal). Anyway, and then I decided to turn it off. Waited a couple hours and turned it back on (Forgot to unplug my hp during power on-off process as stated by the seller but nothing about this seem to be necessary from what I gather with my research) Anyhow, now after the hummming process I only get sound in the right cup, or in both if I don't plug the 1/4 inch all the way down but with poor quality...
The crack was built in 2013 by an engineer and I tried moving all the wires and every joints are rock solid. Does it have something to do with the tubes?
much love, and thanks, I did not have much time with it yet but it seemed a massive upgrade from my objective2
edit: I just noticed the input tube (2a07a) is not on the list
https://bottlehead.com/smf/index.php?topic=663.0 [nofollow]