The treble is very bright in the Siren with good definition and extension. It’s also articulated and nicely separated. But in busy tracks, the treble tends to be a bit mixed and congested. This doesn’t happen usually but happens to depend on the recording.

So the treble is a bit aggressive and forward and it’s the focal point of the Siren. If you like to hear your cymbals in front, then this is your answer. While I think this presentation is a bit over the edge, I think there are people who would like this certain character. Once again, there’s a good resolution and transparency here, a strong suit of the Siren.

Next up, modern pop with “Shallow” by Lady Gaga and Bradley Cooper from the 2018 standout film “A Star Is Born”. I found the GT 220s to have a slight recession in the vocals but remarkable stability and range extending into the upper-midrange. Bradley’s voice was deep and gritty while Stefani’s produced stunning detail as she hit into the upper notes. I would consider the naturalness to be a hair-pin offset from neutral mainly due to the darker tendency of the unit. One area I was hoping for more in would be the energy of the midrange which fell flatter than I was hoping compared to say the Ananda (open back planar). Which speaks volumes to the GT 220 that I’m even bringing up this comparison. 

https://www.whathifi.com/us/reviews/rha-truecontrol-anc

The RHA’s sonic character plays into the hands of such a track: it’s big and full, warm and smooth, with an abundant low-end and rich mids that are able to get stuck into the meaty electric riffs and double-kick drumming. There’s a fair amount of detail in the mix, too.

Switch the noise-cancelling on and it doesn’t affect the sonics as much as we’ve heard with some other earbuds – all in all, it’s pretty satisfying. Their best efforts to reduce background TV noise and everyday road traffic are laudable, although as is to be expected from this kind of design they won’t cloak you in isolation to the extent that heavy traffic or engine noise is completely muted. You’re still likely to be disturbed when playing at low volume or mellow instrumental tracks, too. 

But, what’s really impressive is how natural and inoffensive the FD5 seems to be. Even when I cranked up the volume, or played my usual Techno tracklist, the IEM never threw me back. On this aspect, the FiiO FD5 sounds much more like an open-back headphone, than an IEM: wide soundstage, powerful low kicks, and a very nice layering, that keeps the voice upfront all the time.

Bass especially, feels amazing. It’s deep, clean, and dwells deeply into my eardrum, without overpowering the rest of the spectrum. It’s a cool rumble, one that carries you through your musical journey and leaves you in a better shape than you were when you embarked. Even more, if you can hook up some nice player like the FiiO M11 Pro, 

“The Noble Falcon Pro True Wireless IEMs are a wonder. That they can fit three drivers, transceiver, amplifier, and battery in such a small package that offers over 10 hours of dynamic musical sound is mind-boggling. The sonic profile is what I would call fun, with excellent clarity, strong bass without boominess, and a warm lush detailed midrange, equally at home with pop music and classical.

Noble has definitely made me rethink my attitudes towards Bluetooth, and wireless IEMs in general, producing in the Falcon Pro an IEM that I could happily use for everyday music listening while out and about without having to resort to a heavy DAP and a limiting cord, ideal for streaming music, watching videos, or playing games via a smartphone or tablet.”