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Old 4th March 2016, 02:27 AM   #1
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Default 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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File Type: jpg 24dBoutput.jpg (117.5 KB, 186 views)
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Old 4th March 2016, 12:30 PM   #2
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New and improved? A bit more gain direct coupling and slight adjustment of first stage f3.

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Green=Input
Red=1st Stage Output
Blue=Output
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File Type: jpg 24dBoutputDC.jpg (143.0 KB, 74 views)
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Old 4th March 2016, 09:38 PM   #3
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Where is your Grid bias on the first stage?
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Old 4th March 2016, 10:38 PM   #4
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Missed it on those drawings (posted wrong ones). When I get back on the laptop I will post the right one which has the grid resistor. [Insert embarassed grin].
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