How does it fare against a ER$?

@seanwee this is more emotional er4pt is reference flat

They sound like another level of my recently purchased Heaven VII's. Enjoy!

@rebbi  will do! i like heaven vi too

Great review!

@Pastapipo  thanks mate!

Sounds like something I would be into... Though, I'm not sure what do you mean by too little bass... If it's really too little, that would break the heart, but hearing about over extended top end gives me a thrill, I need something with more and more top end!

@Dobrescu George its wont suffice a basshead (im not a basshead btw)

I get why people like the sound of these, but after my short listen I found that they had a midcentric sound with warm bass. Their extension on both highs and lows is good,which is impressive for a single balanced armature, but the soundstage is quite lacking in depth.
 
There are a lot better headphones at lower prices. I haven't had a long listen, so take my view with a grain of salt. I'd easily choose a good set of Polish customs over these, as the price on the FiBASS is inflated.

Indeed Glass, not to mention the thing looks like an ear suppository! Glad you like them 123.

but @glassmonkey i can safely say no iem can replicate the rawness of the fibass.
 
thank you @Podster !