I’ve used the KRK-KNS-8400s for a year and a half now and they sound pristine. They’re like perfect for surgical edits. They feel like there’s nothing hanging on your head and ears compared to some others I’ve used (due to the foam technology and shape I guess). Now, think conectors: those are robust. But just in case you start banging your head so hard because your tune rocks so much and end up forcing the cables out of their jacks into the wall so they break apart, you can easily replace them.
They’re great when you decide to go out into the wild with a sound recorder like Tascam DR-05 in order to capture the sound of a bee landing onto branches full of leeves in case the picnic gets boring.
For mixing, I use them to monitor and check glueness among synth leads, pads and the snare drum. The highs are as high as they should.
For low end though, they’ll “fail” you. That’s why I have speaker monitors and spectrum analyzers always at reach. Not that they don’t represent lows finely for that matter. They do, but they don’t hype the lows, so you might think “Hey, where are the lows that’ll make hips bounce?!” and end up cranking lows louder than necessary and end up booming your car door windows out later.
I absolutely recommend them for their pristine audio quality but severely recommend the taming of the beast.
I mean “leaves”.