The
Fiio FA19 is a 10 KNOWLES BA IEM.
Very comfortable, easy to drive, with no amplification requirements.
Accessories are fit for a king.
It has 1 tuning switch. In stock form (with the bass switch turned off), the FA19 sounds
warm neutral. Very studio monitor-like, in furnishing a pleasant soundscape. Extremely technical,
massive soundstage beyond the ears, with pinpoint imaging. And this is without needing to resort to a steroid boosted treble to garner "fake clarity".
Bass is nicely
textured and clean with no bleed. Upper mids are only 6 dB - ie
no shout - which was a complaint of the previous FX15 predecessor.
Smooth treble, with minimal sibilance, but still very resolving.
Interestingly, the FA19 has a
vented sub-woofer, so the bass sounds quite close to a DD bass. It isn't exactly 100% similar to a DD bass as there's just a slight lack of decay in the final tail of bass notes, but this improves on the vast majority of unvented BA bass drivers that sound unnatural in terms of movement of air.
For folks that want a bit more "fun" in the signature, toggling the switch converts the FA19 to a bass boost mode, as seen from the graphs. This is a bit warmer than the stock tuning, but the bass is more impactful. Sub-bass extension is even better with the switch on.
The FA19 does have a tinge of BA timbre, but isn't the worst offender in multi BA sets I've tried. Note weight is just right.
The FA19 uses MMCX but the MMCX seem of high quality and snap on and off without issues. BTW I spoke to a custom maker before, and MMCX comes in a variety of grades, from cheap ones seen in ultra budget CHIFI that give a bad rep to the connector type due to being too tight or spinning like a wind-vane, whereas we have higher quality ones that are rated for thousands of swaps.
I bought the FA19 at a discounted price from Fiio, but I think the full retail price is around $1K USD. This pure BA set is well suited for stage monitoring in view of the solid ergonomics and technical chops, and I do think it competes with other TOTL multi driver transducers. Think of something that has good layering and soundstage but not being overly fatiguing.
Will do some A/B testing against other pure BA sets like the Sony M9 etc and report back. Will also test out the QC of the MMCX.