M9 audio signal input terminal can be directly connected to a computer with a USB cable, which can be upgraded to a high-end USB external sound card, and can also be wired to a computer, CD, lossless music player and other audio sources. Various smart phones can also be connected via Bluetooth.The audio output terminal can be connected to various digital amplifiers, active multimedia speakers and other audio equipment, so that the sound quality of your audio equipment is warm and detailed, enhancing the sense of heaviness and presence, and the expressive power of the sound field is very good. Treble and bass can be adjusted freely according to the parameters of the respective audio equipment to achieve HiFi sound quality! The electronic tube adopts the classic 6K4, the sound quality is greatly improved compared with other low-end electronic tubes on the market.
The sound is warm and charming, very atmospheric and balanced, the sound is clear and delicate, and the dynamic is sharp. Specifications: - Audio input terminal: USB-PC audio input 1 group, 3.5 stereo input 1 group, wireless Bluetooth input 1 group - Audio output terminal: RCA output1 group, 3.5 headphone output Package Included: - 1 x Set of Tube Preamplifier. Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days.