I am new to Head-Fi (2 weeks and counting) so forgive me if my question is not appropriate in this forum.
I am trying to understand as to why a typical SET audio amp cannot be use to power headphones as I have not read people using one. For example, I see headphone amps with max power of 1.5W, transformer coupled. If I use a preamp and an SET amp AC or DC heated with volume control also(say 71A at 750mW or a 45 at 1.5 W max output), why can't I use it as a headphone amp? Let say if I use an auto former to make 4/8/16 ohms output of the amp to 30 ohms for example, will it work? If the headphone is say an LCD-2 at 91dB/mW, 133dB at 15W, why can't it work?
Thank you very much for your inputs!