Aune X7S 2021 Version Class A Balanced Hi-Fi Headphone Amplifier - Silver

Powerful Amplifier. Equipped with 8 pcs power transistors that split into 4 groups for true balance output, along with 15V regulated power supply result in a powerful driving ability. Class A is also named as A class. Two pcs of (or two groups of) crystal tubes of class A amplifier output stage are always in conductive state, that is to say, no matter whether there is input signal or not, they would keep conducting current all the time and make these two currents equal to peak value of AC power. At this time AC flows into load under condition of its large signal. Because of super-low infidelity of its open-loop, it is regarded as the most idealistic amplifying design of sound. Class A has merits of fullness and clearness in sound and makes triode work within linear area forever, so infidelity hardly happen to class A. CLASS-A Function. X7s was set in Class-A mode at 38mA static current of each output transistor, it results in a full bodied, wide sound-stage and warm sound character. Excellent Measurement Results. Frequency response: 20-200K0.3dB, noise: 3uV, THD+N: 0.00013%-truly dark background. Sound Tuning. Both nature and musical, according to the real musical instruments and based on the understanding of music connotation. Various renowned headphones ware used in listening tests, such as T1,HD650,TK701,IE80,IE800,HD800,HD600,DT880,K240. Multifunction. With three gears of gain adjust; X7s can drive most of headphones and earphones on the market. Technical Specification : Product type : Headphone amplifier Class : A Frequency response : 20Hz-200kHz @ -0.3dB Noise level : 3V THD : 0.00013% Inter-modulation distotion (CCIF protocol) : RCA : 0.000036% + XLR 0.00057% Output power : RCA : 250mW @ 300 Ohm / 1000mW @ 32 Ohm, XLR : 1000mW @ 300 Ohm / 1700mW @ 32 Ohm SNR : Jack 6.35mm : 117dB XLR : 125dB Input : 1x Stereo RCA Outputs : 1x Variable stereo RCA, 1x Jack 6.35mm, 1x XLR 4 polesbalanced