60W Tube Amplifier Preamplifier Switch Power Supply Board Transformer Power Cow Audio Tube Preamp Radio AMP AC100V-265V 1PC Tips： This product is very complicated to use .Do not buy without an electronic foundation. This product is a special switching power supply developed by professional R&D switching power supply engineers and more than 30 years of amplifier technicians. For the power supply system and audio quality of the amplifier, the final analysis and comparison are made, the quality is very reliable, and all the resistors are used. High-precision, non-inductive high-quality chip resistors, high-frequency, low-resistance and high-quality output capacitors ensure stable switching power supply.
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