Slaphead
500+ Head-Fier
I'm still not sure about the T20, I am however keeping it as it's got such a unique sound signature which really brings a good dose of kick and life into some music, but equally can be painful to listen to on other tracks. Overall I find these have the best balance with the bass filter, as this brings out the midrange. Unfortunately using any of the other filters causes the treble to become overly dominant to my ears.