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    Quantum Amplifier Impedance Mix

    Good day Friends of Caraudio, today I am upset because I have a question with the audio of my car, I have a QE2400.4 Quantum Amplifier, it is a 4-channel amplifier, I am currently using it with 2 speakers 6x9 pioneer 230W max @ 4 Ω and I was thinking about acquiring a pair of Pionner subwoofers...