I'm not sure if I phrased that correctly, apologies.
I've been enjoying the Emberton for 3 months and have recently noticed that whenever I turn the volume up above 50-60% the lows fall behind and are almost not audible. It effectively sounds like I've applied a high pass filter regardless of the mobile device or media App used. This was not initially the case.
Any advice is welcome, seems like a software thing. I've been careful with it.