Actually, they would still be OTLs, because the Zeros are not output transformers but auto transformers, seen as part of the speaker, instead of the amp.
Someone more technical than I can explain it better: http://www.zeroimpedance.com/faq.html#12 Questions #12,13.
Someone more technical than I can explain it better: http://www.zeroimpedance.com/faq.html#12 Questions #12,13.