The FD5 is a complicated earphone. I am guilty of listening to stuff out of the box. I mean who wouldnt right? But if I based my judgement on out of the box sound I would have gotten rid of most of my IEMs and probably not happy with any of them.
FD5 does require burn in. It is finicky of sources, It is finicky of tips, it is finicky of cables. Some earphones are easy as far as plug n play goes, FD5 is not easy.
If your coming from a hyper clear all BA set up. Ya they arent gonna sound like that. If your coming from more neutral tuned sound the FD5 is gonna have a lot of bass and is gonna sound colored to you. ( News flash, earphones are all tuned differently)
After a good amount of burn in. It took me a while in trial and error to nail down the sound from the FD5 I was looking for. It does take a bit of an effort even more so than most IEMs. Look at it as a puzzle you gotta solve. Try this and try that. They are worth the effort, they just need a bit more attention than most IEMs thats all.
Synergy is a real thing with the FD5. Your quest, if your up to the challenge, is to find that synergy.
All true. I have bunch of different tips and cables laying around, and as for source I'm sticking with V50, ES100, BTR5, and planning to buy Q5K later this year, so no fancy DAPs or bulky sandwiches for me. I'm confidant ill find combo that works.