Yeah you will be hard pressed to get better sound out of an inline equalizer changing caps or power supplies etc.. I use a more costly unit than the behringer by DBX, it is smooth as glass and does not add anything when on or off in the sound, so its very transparent already, also it is a pro unit used with pro measurments for live venues, however I don't use it for anything in the midrange and hi's only bass correction so who knows maybe it could be improved in the more criticle frequencies.. Again I don't think the money of mods to such a unit would be justified, or render much better results that you can't electronically adjust within such a tool on its own anyway, maybe, but I feel it would be minimal improvement at best and money better spent elsewhere.