Probably a bit naff quoting myself but hey-ho...
Returned the device, and the new one arrived today, still the same problem, for example select a notification tone for Whatsapp and it's quiet-ish but okay (i'm quite deaf so need a louder than normal notification) then when someone sends a message its super quiet and sort of muffled. I had every intention at some point to root and de-brand it but thought the stock rom was the probelm, so after many hours I finally flashed ARC5, flashed TWRP and rooted with SuperSU ( that lot was a mission on its own) but I've still got VERY quiet notifications...
Very Very annoying.
Anyone developing a volume mod?