TOPPING A90 Full Balanced Headphone Amplifier with with XLR/4.4mm/6.35mm Headphone outputs Stereo Audio Preamplifier for D90 Dac (Black)

【24 Hours Service】If you have any problems in using the product,please feel free to contact the DILVSHI HIFI service team.Using a newly developed NFCA circuit, using voltage and current mixed feedback architecture and UHGF super gain feedback technology, provides excellent DC performance and extremely low distortion. Headphone Amplifier: TOPPING A90 supports XLR/4.4mm balanced headphone output and 6.35 single-ended headphone output. Meet the needs of different headphones. At the same time, it supports single-ended 25Vpp / balanced 49Vpp high output voltage, balanced output up to 7600mW output power, and low output internal resistance of less than 0.1 ohm. Both low-impedance headphones and high-impedance headphones can be used together. 3 step gain: TOPPING A90 has three levels of gain to choose from. 6.35mm single-ended headphone output: -9.5dB, 0dB, 9.5dB. Balanced headphone output: -3.5dB, 6.0dB, 15.5dB. The noise floor is only 0.2uVrms. Pre-Amplifier: A90 is not only an excellent headphone amplifier, but also a good pre-amplifier. As a pre-amplifier, the single-ended output impedance is only 20 ohms, and the balanced output impedance is only 40 ohms. It can be widely adapted to various post-stage output impedance. A90+D90： TOPPING A90 as pre-application.It is an excellent partner for the decoder TOPPING D90.