Suitable for portable players, if you want to use it in the amplifier, please check it whether it is matched with the transformation equipment, | otherwise it may cause the damage to equipment or make the equipment cannot be used. Cable is 8 shares, 3.8mm (8 x 0.9mm) 19 x 0.12mm cores silver-plated cable weaved Cable length is about 9cm - 10cm Silver Plated High resolving power, smooth sound transparent, clear and full of layered detail; IF moist, magnetic voice; full of powerful low frequency.