What is it?
When recommending headphones we tend to advise using open-back designs for critical listening and closed-back designs for recording. This is solid advice as the former tend to be lighter and more comfortable to wear, delivering better overall sonics. Meanwhile the latter offer better passive attenuation and prevent bleed, so you can turn them up nice and loud when recording. That said, well-designed closed-back headphones can potentially be used for all tasks. Lensys Professional from Focal is a headphone that aims to do just this.
