We designed a special transformer for this purpose with a very wide bandwidth of 10-70 KHz. The bandwidth of the transformer defines also that of the amplifier.
The output stage uses components of the same polarity (N-channel), working in the same topology. The power supply for each side is floating in respect to the ground using power supply chokes for smooth filtering.
The output stage is self-stable, eliminating the need to use servo circuits for adjusting dc offset.
Both outputs ,plus and minus carry signal in opposite phase.
Aelius is most certainly a revolutionary product…….