1-IN-2-OUT passive amplifier-speaker switcher: convenient to compare the sound quality of 2 pairs of different speakers, switch bass or treble, and switch between main speaker and tweeter/woofer without plugging in and out cables repeatedly to avoid wearing the contact point of the sockets. Purely mechanical passive circuit: no impact on the sound quality, no need to worry about audio rendering or electromagnetic interference(so-called digital sound), providing HiFi lossless audio without distortion.
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