Originally Posted by xkonfuzed
DT770 has tons of bass, not sure if it will rattle your head though.
The Problem with the DT770 Pro 80ohm is that they need an amp to sound the best, an iPhone just isn't made to power 40-50mm 80ohm drivers.
I used the old Klipsch Image ONE's and S4's with a Sony S-series player and bass boost for huge bass but strait from an iPod/iPhone they don't have that much bass (similar to the Sol republics but better I think).
I will try to cater to what you want but I'm just going to say this. In my opinion and my experience you should keep the Sol Track's HD's and either get a Sony player for music and jack up the "Sony clear bass" (your iPhone battery would last longer?) or a ZO2 amp to use with them but I understand you just want to carry your iPhone so another option is to get (the best ones cast a couple buck's $1-$3) EQ app for you iPhone like eqU to boost the bass, I just found the apps hard to use and they use more battery power than just running from "music".
If you just want, iPhone strait to your headphones the only ones I can think of with enough bass are the Audio-technica Pro700 MKII or for IEM's the Monster Turbine's Pro gold.
Some headphones can put out bass (like the DT770's, Klipsch, Beat by dre, V-moda's, B&W P5's, Denon D2k and 5k, Audez LCD-2 etc) and some headphones just can't like the Shure SRH440 and 840's, etymotic and more analytic tunes balance armature IEM's, AKG K701's and stuff like that but in order to get truly skull crushing impactful bass from what I have experienced you need a headphone that can produce deep impactful bass with some degree of bass boost, even a little goes a long way with already bass heavy headphone's.