MFB
Philips (actual product) and Celestion (experimentally as I understand) both abondoned it, I'd see what I could learn from one of the Philips MFB speakers, or at least a circuit diagram.
MFB I think would be an ideal technology for bass reproduction, if it could be made to work, nothing a little onboard computing power wouldn't be able to handle I would imagine.
I think Noel Keyward of Hi-Fi World magazine dabbled with it as well, albeit in a rather too simplistic fashion as it transpired!
SC
Philips (actual product) and Celestion (experimentally as I understand) both abondoned it, I'd see what I could learn from one of the Philips MFB speakers, or at least a circuit diagram.
MFB I think would be an ideal technology for bass reproduction, if it could be made to work, nothing a little onboard computing power wouldn't be able to handle I would imagine.
I think Noel Keyward of Hi-Fi World magazine dabbled with it as well, albeit in a rather too simplistic fashion as it transpired!
SC
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Keep in mind that the motional feedback won't change the bass loss that arises when you use a driver in an open baffle configuration. This is an acoustic phenomenon.
Motional feedback attempts to make the cone movement follow the (electrical) input signal closely. You will still need to contour or EQ the input signal mirror the acoustic loss at low frequency from the open baffle loading.
Motional feedback attempts to make the cone movement follow the (electrical) input signal closely. You will still need to contour or EQ the input signal mirror the acoustic loss at low frequency from the open baffle loading.
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