To be fair to my friend, the I2A3 is a very good amp. The build quality and looks are top notch. It is a great sounding amp also. The difference was mostly in the bass area. The A318B is hard to beat in bass for a S.E.T..
Also, he listens at low level volumes at night while his family is sleeping. The volume attenuator was not sensitive enough for his listening style. The A318B has a linear volume that is much more sensitive to low volume listening. He no longer has the I2A3 amp. He went with a Ayon amp with remote control that is suited to his listening style. The Ayon amp is a very nice amp, but more money also.
Also, he listens at low level volumes at night while his family is sleeping. The volume attenuator was not sensitive enough for his listening style. The A318B has a linear volume that is much more sensitive to low volume listening. He no longer has the I2A3 amp. He went with a Ayon amp with remote control that is suited to his listening style. The Ayon amp is a very nice amp, but more money also.