Hi everyone, As you can see from my signature i only own wireless headphones/earphones and im about to buy my first wired IEMs. I commute a lot via airplane and trains therefore my primary concern is to find an IEM with good passive isolation (no ANC without bluetooth, right?). Can someone...

Hi everyone, First I’d like to inform you that I’m new in the forum and also in the field of audio, therefore i apologise in advance if my question doesn’t make sense. Im about to buy either the new release of Audio 64 which is the U4S or the Sennheiser ie 900. Could any of you differentiate...