Thanks for all your replies!
Yes I made sure all the media volume was at full.
So if I use the SoundAlive option which type would be aimed for an external speaker source does anyone know if there is one? Tube amp effect or Virtual 7.1 ch perhaps?
If this doesn't surfice I will probably go down the rooted road of the links below but I would rather not and shouldn't have to really.
DroidViews | How to Increase Speaker Volume on Your Rooted Samsung Galaxy S4
[MOD] Galaxy S4 Sound Boost
When you're down the beach or in a park you really want to be able to have a speaker to be at it's loudest at times and not have iPhone owners laughing at a volume level that should be standardised for a top of the range phone...