LDR Optocoupler Hi-Fi Attenuator - Technical Data & Laboratory Tests

THD & Noise @ 6 kHz

THD & noise at maximum volume for 6 kHz input, bear in mind that LDRs cannot achieve a full 0 dB attenuation (lossless) because the LDR possess a minimal resistance even when fully lit, in this case, the maximum volume is of -1.9 dB. The noise is below the 100-105 dB of the testing device, while the effective THD is below 0.02 % 

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