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Amazon.com: AKG K240 Studio Semi-Open Over-Ear Professional Studio Headphones with Knox Gear Headphone Amplifier : Electronics
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Amazon.com: AKG Acoustics K240 Studio Over-Ear Semi-Open Pro Headphones, 15-25000 Hz Frequency Bandwidth, 55 Ohms Impedance, Screw-on Jack Combo - with H&A Clamp On Headphone Holder for Mic Stand : Musical Instruments
![Amazon.com: AKG K240 Studio Semi-Open Over-Ear Professional Studio Headphones with Knox Gear Headphone Amplifier : Electronics Amazon.com: AKG K240 Studio Semi-Open Over-Ear Professional Studio Headphones with Knox Gear Headphone Amplifier : Electronics](https://m.media-amazon.com/images/I/51nsuf3B7gL._AC_.jpg)