Hello all I bought the audeze sine based on the reviews. I also got them on sale for 299$. They sound good but lack bass IMO. I bought a jds labs c5s amp for them but it just seemed to make the sound quality demish and the bass it added wasn't that good. So I returned that. Any suggestions on alternative headphones that have similar sound quality that don't lack bass. I will be using them strictly for traveling connected to a surface book for movies and music.