• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

a sub crossover idea

final slope 24dB 1st order boost in the pass band to counter driver roll off.

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I wonder how much of the phase and slope change above 1.2kHz is real and how much it matters given we are down well over 100dB at that point. Green trace is input Red trace is output.
 

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