The AIC-10 is a hybrid amp, pure “A” class, employing a triode valve (ECC82/12AU7 type) in the pre-amp section. It has two headphones outputs (unbalanced 6.35 and balanced 4 pin). Due to the amplifier design these two outputs will sound identical but it is nice to have the choice to match our headphones cables’ termination. On the back it has 3 line inputs and speaker outputs.