Originally Posted by JCH-19
Thanks for the advice! I saw in your review that you said the FX101 has a vent under the X. Does this make them bleed sound to the outside? I ask as I spend a lot of time listening in quiet places with other people. Also by sibilance with them, does that mean harsh treble? I really dislike listening to harsh treble, but is it overly prominent with the FX101?
Wow, I actually went ahead and tested this. I remember being concerned about the same thing when I noticed the vents. At my loudness threshold (which is very, very loud; here the FX101 bass already cracks) and with the earbuds sealed with my fingertips an arm's length away, they bleed a muffled sound that is not louder than my PC fans. Which can be problematic because PC fan noise is comfortable noise whereas music can be distracting. Now, about a meter away, I can barely hear them even if I concentrate. I guess you can use it in a library if you can find a seat with noone around in a meter radius haha. You may have a problem in plane rides if you crank it loud and you're sitting next to someone trying to sleep. The sound leakage is definitely not at the level of open-back cans where you can hear them playing across rooms (I stopped using my Grado SR60 because of this and switched to IEM's for the first time).
And yeah, I only noticed the treble is harsh when I listened to black metal. If you listen to a song with already harsh high frequencies such as extreme metal or noisecore it's unbearable without EQing the treble down. So yeah, this might be the biggest deal-breaker for you. As for me, I bought a CX870 prior to the FX101, and the CX870 has harsh treble. Because I didn't want to accept that I wasted money, I trained myself to LOVE the sound lol, convincing myself that the highs are boosted because the headphones want to emphasize its capabilities on higher frequencies. When I got the FX101, I didn't think they have harsh treble at all until I tried extreme music. You should ask around a bit more about this; there are many FX101 owners in here. I don't want to recommend the FX101 without an accurate estimate of your noise and pain thresholds.
BTW, I read that you have the Sony XB500. I wish to try that as well so that's one reason I want you to try the FX101 so you can tell how they compare with a basshead IEM.