You can just use a software EQ. I don't use EQ's anyway, you'd have to change it for every song you listen to.
I've used a software EQ (primarily my X-Fi EQ) for over 10 years and this is not the case, couldn't be more from the truth in-fact.
Sure if you MUST find the most BASS or best tuning for each and every song...well there's no other choice anyways...a DAC won't get them all right if you're that picky. So really you either tune it more to your liking after your sound card, dac, amp purchases or deal with what those bring to the table. I'd prefer to tune it even more to my liking and have a quick and easy setting should I need to make a change. But every song? Not even close! That's laughable should you choose not to tune your EQ to one song or genre or media type. But even then, having an EQ tuning for rock, rap, movies, youtube, gaming, etc. isn't a bad idea either...for those too lazy or becoming lazy, can very easily use one setting and be done with it. That's how I roll primarily anymore..keeps it simple and sounds damn amazing no matter what I throw at my sound system...all that really matters is if to does sound good to the listener, that's what it's all about.
I set it and forget it...and I have one EQ that works for my 2.1 hi-fi setup and my headphones. And another EQ setting if I feel I need more bass on the headphones too...which I rarely use anymore.
There's some pretty good EQ's out there if you don't have the X-Fi EQ, which I find to have the greatest effect with it's tuning to my ears, without distorting to hell and back..especially in the bass department...I haven't found an EQ that can match it on the low end yet.
But if you need an EQ and don't have a creative/X-Fi card...check out EQ APO:
http://sourceforge.net/projects/equalizerapo/
It'll EQ everything on your sound output. Or you can choose a media player should you want to only EQ your media, etc. This makes even using DAC's for some nicer should they get one bass-light and want more bass. Food for thought.
