The information age: where everyone can have an opinion, and everyone is divided, and so the progress made is less than you'd think.

Since reading the Audioquest report on the relationship between warm-up and jitter reduction, I'm curious how I can take advantage of this when using portable DACs. Audioquest inform me that warm-up requires active audio throughput to be achieved. Is there a consensus on this? Additionally...

My AKG Y50 headphones are less than 5 months old and the uPVC leather headband is beginning to peel away to reveal the foam.  I'm disappointed, considering this is similar to what happened to the AKG 451s I owned, only with those it was the uPVC on the earpads.   My seller has offered me a...