KRK KNS-8402 Over-Ear HeadphonesExperience great sound with the KRK KNS 8402, a pair of circumaural, closed back headphones that won't break the bank. With 40mm neodymium drivers that deliver a 5 Hz to 23 kHz frequency response, these headphones give you an accurate accounting of your music across the frequency response. Use them to block out annoying sound too: they're good for up to 30 dB of passive noise reduction. An impact resistant plastic construction renders the headphones