Hey   I have been having trouble with my C5 amp using a iphone as source and HE-400 phones. When i am listening at relatively low volumes it is fine but as soon as i turn the amp up to medium to higher volumes (source is at 100%) it will start to get louder but then immediately after one notch...

Hey everyone,   I recently got the momentums and like them a lot so far. My major issue is with the mic/control cord. I have seen others speak of degraded sq with it but my experience is specifically with using it with my JDS O2/ODAC hooked up to my computer.   When I plug in the phones to...