I have a iPhone 4 and listen on headphones to my music - but it doesn't seem to get very loud.... I have gone in settings and removed the "volume limit" - I have "sound check" off... and the EQ is off.. Is there a another way to boost output into my earphones? I am not deaf - I do like loud music - I am using a pair of ultimate ears 700 dual driver noise isolating IED's. Thanks!!