Signal to noise ratio

Refers to the ratio of the normal sound signal played back by the speaker to the noise signal (power) when there is no signal. Expressed in dB. For example, the signal-to-noise ratio of a speaker is 80dB, that is, the output signal power is 80dB greater than the noise power. The higher the SNR value, the lower the noise.

The minimum requirement for the SNR of the International Electrotechnical Commission is that the preamplifier is 63dB or greater, the postamplifier is greater than or equal to 86dB, and the integrated amplifier is greater than or equal to 63dB. The best value of the signal-to-noise ratio of the integrated amplifier should be greater than 90dB. The noise ratio can reach more than 90dB, and the high-end can reach more than l10dB. When the signal-to-noise ratio is low, the noise is serious when the small signal is input, and the sound of the entire range is obviously murky. Therefore, the speaker whose SNR is lower than 80dB is not recommended to purchase, and the subwoofer 70dB subwoofer is not recommended for the same reason.