[nayf]

Hi All,
 
I recently purchased some Atomic Floyd Minidarts. Super clear sound.
I have done some research on these buds and portable amp/DAC's though I have (what may seem) a rudimentary question.
 
The specs are these:
Atomic Floyd Minidarts-
-Sensitivity (1 kHz): 107dB SPL/mW
-Impedance (1 kHz): 17Ω
-Frequency range: 20 - 18,000Hz
 
iPhone 5s for iPod.
 
 
For some of my music I would like more bass depth.
 
Now this may sound like a ridiculous question but I am out of my depth here. I am wondering what benefit I would gain from adding an amp or amp/DAC to my setup based on the Frequency range of 20 - 18,000Hz on the Minidarts.
 
1. Can I get deeper bass out of these earbuds that give this frequency range?
 
2. Will I just get distortion because they're not built for those lower frequencies?
 
3. What would be a recommendation for a portable amp or amp/DAC (towards the mid-budget end of the scale) that would benefit my setup?
 
 
Thanks in advance