Output DC cable plug type: default 5.5 2.5mm (Polarity: Internal + / outside - ). 2 × Oxygen-free copper output DC cable. (The default DC plug size is 5.5 2.5mm. we also can provide 5.5 2.1mm or other size).
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Bluetooth 5.0 & Stereo RCA & MM Phono inputs: MM phono input, converts phono signal to line level signal and amplify it, with low-noise integrated circuits and high-quality components to ensure clear and clean sound. Bluetooth&RCA input, amplify the low level audio signal from your phone, tablet, MP3 etc. and provide enough output power for passive speaker, greatly improve the sound quality. JAN5725 vacuum tube & HiFi Sound: default with JAN5725 tubes, improves everything associated with your music such as detail, transparency, immediacy, richness, dynamic, tone etc., much better than 6J1 series especially in human voice. Pluggable tube socket for tube rolling and sound-shaping, easy to pick from and alter the sound signature to one's preference. .
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DC5V 7V 9V 12V 15V 16V 18V 24V For choose. High speed low resistance HIFI electrolytic capacitor. Very low noise TL431 with excellent performance. Output DC cable plug type: default 5.5 2.5mm (Polarity: Internal + / outside - ) （ pin 1 + / pin 2 - ）.
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The rectifier adopts a high-current Schottky 30CPQ150, and each group of positive and negative power supplies share 4, and the entire board has 8 high-current Schottky tubes. The current capacity is very abundant!
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Power output: 50 watts per channel into 8Ω (stereo). Signal to noise ratio: 98dB (line). Input sensitivity: 300mV (line).
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Pcb size:100 x 92mm. This is diy pcb ，not included any parts ！. DC7V-28V (MAX 2A).
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Preamp tube model： 6922 x 4. ARC SP-10 preamp board pcb x 1. Preamp board pcb size：210 x 175mm.
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Use double 6Z4 tube rectifier bridge. Assembled board for reference：. Use of FET combined with regulator.
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