- Theinventiondisclosesanenergy-savingsmokeexhausterwithswitchableleftandrightairinlets.Youcanalsoplugaguitarorbassdirectlyintochannelone'sswitchablehigh-impedanceinput.Eachchannelhasabalancedinputandconvenientlyswitchableinsert,MuteandSoloswitches,ma...
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