Krk, KNS 6402 Headphones For Discriminating Ears offer precise sound reproduction in an affordable, extremely robust design that works well for a range of applications. Up to 26 dBA of isolation is provided by the closed-back, circumaural ("around the ear") design, which greatly lessens headphone "bleed" into the microphones during recording. Their outstanding isolation capability also eliminates outside noise interference so you can concentrate on the music. They can provide all the levels you'll ever need with very little distortion and a beautiful, precise sound thanks to their maximum SPL of 122 dB. You may trust KRK headphones as a reference. They are reliable for even the most demanding listening situations because of their precise frequency response, superb stereo imaging, and steady KRK voicing.