And specailly design a low frequency output to connect active subwoofer, very convenient to build 2.0/2.1/4.0/4.1 channel system. Speaker impedance: 4-8. Multiple inputs: besides Bluetooth5.0/stereo RCA/3.5mm AUX inputs, which can be compatible, cellphone, MP3 player, CD player, dataplay, computer, decoder, etc.
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