Headphone amplifier

EE September 1986 HEADPHONE AMPLIFIER Anyone with a keen ear for hi-fi sound reproduction should read this article, which details how the Type TEA2025 chip was revisited once more to make a versatile, yet compact and low component count stereo headphone amplifier Circuit details Already incorporated in Elektor"s portable mixer (see Elektor Elec- tronics, issues of April, May and June 1986) and briefly discussed in the Summer Circuits issue of this maga- zine (Elektor Electronics, July & August 1986, p. 28), the Type TEA2025 stereo amplifier chip is the basis of the present design of a head- phone amplifier circuit, details of which are shown in Fig. 1. The amplifier chip is fed from a 12 V supply which ensures ample output power for use with 30 to 600 ohms impedance headphone sets. Total harmonic distortion at maximum out- put is of the order of 0.1%, although it must be noted that the amplifier then produces a sound pressure level which may be harmful to the ears. The TEA2025 is ...