[Sanken] SK3875 is a mysterious fever device. There is no official sales on the market, and its parameters are unknown. However, sony's mid-to-high-end audio system is more used, and Sony is looking for a custom. The power is about double that of the LM1875. After the domestic fans use the big call, the author also tries SK3875. After using it, the first feeling is to recommend it to the fans. The low frequency high frequency extension is very good, the low frequency is very powerful, which reflects the three.Power tube characteristics;
Name: SK3875 Two-channel amplifier board
Output power: 50W*2; @8Ω@±35V; @4Ω@±35V
Power amplifier board size: 130mm*87mm;
Printing plate specifications: FR4 2mm thick / 75um thick copper foil,
Electrolytic diameter: The plate supports a large electrolysis 10mm pitch with a diameter of 35mm;
Relay specifications: OMRON G2R-2; 24V
Protection IC :upc1237
Magnification: 23 times;
Input impedance: 22k;
Signal to noise ratio: 102dB;
1: This board adopts the best application circuit and adopts DC servo circuit. The output midpoint of the circuit is always below 1mV, the noise is below 0.4mV, the signal-to-noise ratio of 102db is reached, and the output distortion is below 0.005%. The input capacitor and feedback capacitor are tied to make the SK3875 achieve the best working condition. The sound is super-passible. This board is the best SK3875 power amplifier board on the market.
2. This board integrates rectifier filter and speaker protection to effectively protect your speakers. The board is a purely rear-end design that can be easily matched to many excellent pre-levels on the market.
3, SK3875 original authentic with the same batch! The real-life SK3875 kernel crystal cell diagram is as follows: [Note: the two large tubes above the figure are obvious]
4, the main filter electrolytic capacitor uses: brand new Japan imported P'anasonic UP series audio fever capacitor 50v/12000uF;
5, the use of new fever components: 718 and P-hilips resistance; Nissei / P-hilips / Nikko / AV Ake capacitors; ON regulator tube and rectifier; 25A large rectifier bridge; KEFA copper foot connector, imported Omron relay!
6, the authentic SK3875 power can reach [email protected]Ω. The DC voltage of the power supply can be up to +-42V. (Measured in the S'ONY P909/P707 audio, its working voltage is ±33V) The package size is equal to the high-power plastic tube, 5 pins.