I don’t push the ZEROs because of the Maggies
You started this Ralph with your second post.
Didn’t say you pushed Zero’s because of the Magie’s, just any speaker that are hard to drive. Read a bit more carefully.
What I did ask.
" https://www.stereophile.com/images/217MagS52fig1.jpg
But what I will ask you Ralph, is one of your production OTL amps going to stay flat in frequency at a reasonable loudness level and envelope of +& - 1,2 or even 3db, into this load without the band-aid use of any external Auto-transformers (Zero’s)?? BTW, this is a yes or no question..."
BTW: here’s Stereophiles test take on the Merlin VSM
" The speaker itself was quite sensitive, at an estimated 88.5dB(B)/2.83V/m, which, in conjunction with its moderate impedance (fig.5), will make it an easy load for the partnering amplifier."
As I said " In other words easy to drive speakers that are as close as possible to a pure resistive load,"
Cheers George

