mušle otevřené náušníky supraaural, molitan kmitočtový rozsah 15 - 25.000 Hz zkreslení < 0,2 % citlivost 103 dB SPL (1 mW) impedance 60 Ohm hmotnost 80 g kabel 1,25 m do obou mušlí konektor 3,5 Jack (někdy zlacený) redukce 6,3 Jack (někdy zlacená) Koss SportaPro Stereophone Sporty Portable Delivers High Quality Sound for Active Listeners The SportaPro is the perfect stereo headphone for music lovers who need to move from the boardroom to the locker room without ever missing a beat. Combining the same amazing sound reproduction capability of the Koss Porta Pro with a flexible headband design that permits the listener to wear it on top of or behind the head, the Sporta Pro is the perfect accessory for music lovers on the go. Dynamic elements deliver deep bass and a wide frequency response from 15-25,000 Hz. Extremely rigid mylar elements ensure accurate sound reproduction and minimize mechanical distortion. The SportaPro features computer-optimized neodymium iron boron rare earth magnet structures to deliver great volume so you can hear every detail in your favorite movie or tune even with low-voltage DVD and MP3 players. Oxygen free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. Perfect for the active listener, the SportaPro's unique headband design pivots backward at its base, easily converting from over-the-head style to a behind-the-head style that won't interfere with hairstyles or headgear like helmets or baseball caps. Foam earcushions rest comfortably on the ear and provide an open, hear-through sound that keeps you in touch with your surroundings. Cushioned pads at the temporal bone diffuse pressure away from the ear for a uniquely comfortable fit. The adjustable headband with multi-pivoting earplates accommodates all head shapes and sizes and stays in place even during rigorous activities. At a mere 2 ounces, the Sporta Pro feels practically weightless even after hours of listening. When not in use, the Sporta Pro collapses into a compact protective package that tucks neatly in a briefcase, gym bag, or backpack. For maximum portability, a carrying case with drawstring is included. The Sporta Pro includes a straight single-entry four-foot cord. A gold-flashed 3.5mm (1/8") plug, L-shaped to minimize cord stress, is included. The Sporta Pro is ideal for active music lovers motivated by an excellent sound performance with deep, rich bass.