If ever you want to try some earplugs, these are a great value
http://www.crutchfield.com/S-7TbQH3OwqHJ...rch=sony+earbud
and these are as close to high end sound as we mortals can afford, short of going to custom molded pro tier transducers
http://www.etymotic.com/ephp/er6i.aspx
And if you want some more SPL, and the ability to mix multiple inputs, like a radar detector and GPS audio in with your music signals...
http://www.tesseractcorp.com/
