The LM3886 is a high-performance audio power amplifier integrated circuit with a maximum output power of 68W. The tone is accurate, noise and distortion are relatively low, and the protection function is perfect and the performance is stable. The LM3886 has received rave reviews and soon became the configuration of large and medium power HIFI audio amplifiers and high-fidelity active monitor speakers. The famous American audio manufacturer Lelin has the expensive machine with LM3886 as the core of amplification. It can be said that LM3886 is one of the audio amplifier ICs that every audiophile must play and often play. The TDA7294 is a high power integrated circuit for field tube output. Quite a bit. It has completely changed the vivid, cold and hard sounds that have been successfully put in the past, and is widely used in the field of HI-FI. The chip is designed with a focus on tone. It is resistant to high voltage, low noise, low distortion, high power, and soft tones. With the new original LM3886 and TDA7294. The front input capacitor and the interstage coupling capacitor use CBB top capacitor 3.3UF, electrolytic capacitor signal The main circuit adopts Taiwan famous brand. The main filter capacitor adopts black diamond capacity of 10000UF/50V*6, the total capacity reaches 6WUF, and the rectification adopts 50A and above flat bridge to ensure strong and continuous power support. The resistor uses a five-ring metal resistor, and the main circuit uses a five-ring metal film resistor with an accuracy of ±1% to ensure a good signal-to-noise ratio. The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of the current. First-class PCB quality. The subwoofer is composed of two new TDA7294 BTL outputs, which is powerful! The other channels are served by five LM3886s, each with a LM3886TF support. The horn protection has a relay independent control for each output, and the performance is more stable. The layout of the entire circuit board is quite rigorous and reasonable, and the overall PCB trace adopts a grounding method. The power amplifier board works stably and reliably, and the output power is large; the sound is beautiful and round, and the sound field is wide. The three-dimensional sense is strong, the low frequency is solid and solid, the signal-to-noise ratio is quite excellent, the dynamic range is wide, the details are clear, the transient response is excellent, and all kinds of music are played comfortably. It has a very good performance in the family’s playback environment. Basic parameters: Supply voltage: AC double 20V-24V, recommended double 24V/400W or more Output power: 50W*5 (4 ohm left and right channel) +160W (8 ohm subwoofer) PCB size: 306*97MM
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