Hi everyone, I'm totally new here.
I just recently bought a Bottlehead Crack + Speedball installed from this ad:
https://www.head-fi.org/t/667725/bottlehead-crack-amp-sold-but-extras-availableI've been waiting for almost two weeks because of shipping, because I'm not in the USA. I received this this morning. And I noticed some issues with this Crack.
When I plugged the HD650 in right after plugging the power cord in, I heard no hum, noise. But as soon as the tubes are burnt and become hot, I heard pretty loud hum on the right channel, this hum does not change if you turn up or down volume. And when I played music, the sound coming from right channel was somehow louder than the left channel, and this leads to the overall sound is unbalanced ( the vocals are at 1 o' clock direction instead of 12 o' clock ) . I don't know anything about the DIY at all. So please tell me what's wrong with my Crack? Attached here is the build of my Crack, which is built by the seller I bought it from.
Thanks in advance! Looking forward to hearing from you.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2Fe%2Fe2%2F900x900px-LL-e25d0edc_e911bf3a_DSC_09951_01.jpeg&hash=0a662fb35a1159fb58685e2376ed255ecf9a6eb9)