Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Material: Plastic _x005f_x000D_ Working voltage: Recommended dual DC 10-45V dual DC 35V _x005f_x000D_ Rated output power: 100W (4 ohms ± 35V) _x005f_x000D_ Maximum output power: 150W (4 ohms ± 45V) The heat generation is huge, not recommended _x005f_x000D_ Size: 80x50x35mm/3.35x1.97x1.38inch _x005f_x000D_ Pitch: 5.08mm _x005f_x000D_ The hole distance between the two power tubes: 47mm2SC5200+ZSA1943 is a disassembled part, but in good condition. _x005f_x000D_ The PCB board is changed to black, but the function is the same. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ The for Toshiba control of this product is a second-hand original chip that has been disassembled! ! ! _x005f_x000D_ Please pay attention to the distinction! ! ! _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x Tube Power Amplifiers 1. Low Noise Switch: The switch produces minimal noise, ensuring it does not interfere with the speaker's performance. We recommend adding a speaker protection circuit. This tube power amplifier not only eliminates the impact noise during power on/off but also prevents damage to the speakers by blocking any DC output in case of amplifier malfunction. 2. Minimal Background Noise: The speaker has extremely low background noise, allowing you to place your ear close to the speaker without hearing any unwanted sounds. This feature ensures an immersive audio experience. 3. Negligible Drift: Once installed, there is no need for any adjustments or tuning. The output voltage drift is typically less than 50mV and remains stable over time, providing you with a reliable and worry-free usage experience. 4. Classic Circuit Design: The use of a classic circuit design guarantees stable and reliable performance. Even if there are some unintended errors during production, the components remain protected, resulting in a high durability rate. You can trust in this hifi audio amplifier board's long-lasting quality. 5. Plug-and-Play: No need for any additional tuning or adjustments. As long as you correctly connect the power amplifier board without any human errors, it is highly likely to work flawlessly from the first attempt. This user-friendly feature makes it ideal even for beginners, who will have a high success rate right from the start.