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This machine adopts attenuated tone circuit + NE5532 preamplifier compensation. When the power is supplied, the amplifying part of the NE5532 works for compensation, and the gain is 0db, that is, the input and output signals are equal.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.