I think 627 is better, in the electronic circuit, the op amp (operational amplifier) is an important signal amplification and regulation device. 627 and 827 are operational amplifier models, respectively LM627 and LM827. When comparing their sound quality, we need to consider the following aspects:
1. Frequency response: The frequency response of the op amp has a great impact on the sound quality. The wide frequency response of the LM627 makes it suitable for a variety of audio applications. The LM827, however, has a narrower frequency response and is more suitable for processing high-frequency signals.
2. Signal-to-noise ratio: Signal-to-noise ratio is an important indicator to measure the performance of the op amp. The relatively low signal-to-noise ratio of LM627 may result in poor sound quality. The LM827 has a high signal-to-noise ratio and can provide better sound quality.
3. Gain bandwidth product: The gain bandwidth product reflects the relationship between the gain and bandwidth operating at a specific frequency. The low gain-bandwidth product of LM627 makes it suitable for general audio applications. The higher gain-bandwidth product of LM827 makes it more suitable for processing demanding audio signals.
4. Distortion degree: Distortion degree is another important indicator to measure the performance of the op amp. The distortion degree of LM627 is high, which may lead to the deterioration of sound quality. The LM827 has relatively low distortion and can provide better sound quality.
Based on the above factors, LM827 has certain advantages compared with LM627 in terms of sound quality. However, the specific sound quality performance is also subject to circuit design and power supply
1. Compared with 827, 627 has better sound quality. This is because the 627 operation design pays more attention to sound quality performance, adopts higher quality components and circuit design, can provide lower distortion and higher signal-to-noise ratio, making the audio signal restoration more accurate and clearer. 3. In addition, the 627 has a wider frequency response range and lower output impedance, which can better drive a variety of audio devices, resulting in more delicate sound quality and a wider dynamic range.
Therefore, if the pursuit of higher sound quality needs, choose 627 op amp will be a better choice.
Compared with 827 op amp, 627 op amp has a larger output voltage, which belongs to high-power and low-power op amp. Compared with 827 op amp, the sound quality is better due to its high output pressure.