Pros: value for money, BA, sound signature, fitment
Cons: cable, size
The prices on these IEMs vary so my rating is based on value as a major rating...I purchased mine for $200USD.
You would buy these because you want a fun signature...you would buy these because you are an individual that tweaks with the EQ...
The first impression is the bass and sub-bass. Nothing on the short across the spectrum, it just gives me very fulfilling sensation. It comes to my favourite aspect of this IEM is its separation of sound! This is what 4 BA was meant to do! Wack on any tunes from Disclosure or Clean Bandit and this IEM just blitz every track with the rich detail and the well articulated bass and a breath of vocals.
Throw into any tunes with high complexity and overlays, the XBA40 takes it for a piss...*too easy*, notably many of the acoustics from Zedd...and the separation is excellent!
I say all of this purely from someone who enjoys his music and the ultimate rating is not based on its design or its natural signature but purely based on my enjoyment...