OPEN BOX. Authorized Dealer. ATH-CKR9Featuring the world’s first dual phase push-pull driver system, the ATH-CKR9 in-ear headphones deliver amazingly clear, high-resolution audio. The unique push-pull system incorporates two 13 mm drivers that face each other, but are wired out of phase, providing lower harmonic distortion and improved damping and bass frequency control. Machined aluminum housings reduce unwanted resonance for crisp mid- and high-range audio, while a stainless steel acoustic resister and a bass acoustic resister provide accurate high-frequency and low-frequency response, respectively. The ATH-CKR9 in-ear headphones also come with four sizes of interchangeable eartips for a customized fit and outstanding sound isolation – another measure to help deliver audio reproduction that rivals the original sound.Key FeaturesDelivers amazing, high-resolution reproduction of the original soundWorld’s first dual phase push-pull drivers (13 mm x 2) provide extended frequency response by reducing intermodulation distortionMachined aluminum housings greatly reduce unwanted resonance for crisp mid- and high-range reproductionStainless steel acoustic resister provides improved high-frequency response, while bass acoustic resister delivers accurate low-frequency responseIn The BoxATH-CKR9Silicone eartips (XS/S/M/L)Protective carrying caseSpecificationsTypeDynamicDriver Diameter13 mm x2Frequency Response5-35,000 HzMaximum Input Power200 mWSensitivity109 dB/mWImpedance12 ohmsWeight12 gCable1.2 m, Y-typeConnector3.5 mm gold-plated stereo mini plug, L-shaped