Almost fifty years have passed since John Koss and Martin Lange Jr. developed the world’s first pair of stereophones, the Koss SP3. With more than forty models, including the astounding ESP950 electrostatic stereophones, and the value-priced Koss Porta Pro; long considered one of the best headphone options below fifty dollars, Koss has the market covered. Studio professionals looking for a pair of durable and accurate headphones now have two options from Koss including the MV1 and PRO4AAAT. Koss also offers a unique “lifetime warranty” for their stereophones, only charging a nominal fee for shipping and handling. Koss offers a complete selection of over 40 different models of stereophones, ranging from their top-of-the-line electrostatic stereophones, noise reduction systems, Bluetooth, and infrared stereophones to our line of lightweight, portables.  Whether you are looking for lightweight portable headphones for the daily commute with your iPod or for something that will remain in place during a workout, Koss offers products of real value.