Galaxy S6 :: Low Speaker Output / Volume

I have a gsm galaxy s6 in the UK. To me the loudspeaker output volume is low, certainly lower than the first one i had and im wondering if its anything to do with a recent update.

To explain further, when the s6 was first released i had one of each (s6 and s6 edge) and the handset was on 5.0.1

I was not entirely convinced by the handset and decided to return them and go back to my iphone 6. One of the things i was really impressed with on the handset though was the speaker output. I remember this particularly as it really stood out and i can remember that when playing music or watching youtube that even on 1/2 volume it seemed as loud as any other phone i had used with plenty in the bank to go higher.

Anyway, after a couple of weeks i decided to leave the iphone and get another s6. This phone was purchased sim free and came to me fully updated to 5.0.2 (no further updates available)

I find now that with this phone the volume seems really low and find myself playing it often above the 3/4 mark and not far off full. I know that these type of things are quite subjective but i am certain the earlier ones i had were much louder.