As far as I know Nelson doesn't design anything with BJT outputs.Suggest you look at nearly all the bigger Thresholds amongst others he designed.
Cheers George
Devialet for Wilson Audio Sasha 2 Speakers
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Even so this sort of impedance and -phase angle load that the Sasha presents in the bass needs a lot of current to drive, and BJT’s do that better than Mosfets can. https://www.stereophile.com/images/archivesart/710Wilfig1.jpg Cheers George |
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Device for device a BJT will out current a Mosfet. Given powersupply conditions are right for both. Sure 10 complimentary pairs of Mosfets, will do a certain "current job". But 10 complimentry pairs of BJT’s will do a far better "current job". That is why Krell and Agostino and others use BJT’s, as they want to be able to almost double the wattage for each halving of impedance load all the way down to 2 or even 1ohm, to drive things like Sasha's and Alexia's Cheers George |