Hello there.   As the title indicates, I'm looking to replace my Sennheiser HD-555 headphones. They have served me well, but due to a change in living arrangement (+1) the fact that they're open headphones just doesn't work anymore.   What are my criteria for new cans?   I'm using my...

My apologies if the uDAC isn't considered portable and I have posted in the wrong forum...     Okay then. I have some intermittent problems with my Nuforce uDAC. The problems occur very often. 1. Sometimes the volume is reduced and the left channel is barely working. The sound is also...