🚀 go-pugleaf

In article <1992Aug17.170921.1628@imax.imax.com> dave@imax.imax.com (Dave Martindale) writes:
   >Circuitry to convert 16-bit data at 44.1 kHz to digital data at about
   >1.5 MHz is readily available - that's exactly how the "1-bit" DACs
   >work.  Whether you could build a class-D power amp that would amplify
   >this signal without radiating RF all over the place is another question,
   >but if you could, it would eliminate analog stages entirely.  And it
   >would be efficient.

And you would have a set of large-amplitude rectangular pulses,
which would need to be bandlimited (dare I say, filtered) before
presenting them to the loudspeaker voicecoils.  The output
impedance of this contrivance needs to be quite low or else the
damping factor will suffer.