Those speakers could be replaced with modern ones (more efficient) from Polk, Klishch, Zu Audio, Focal, Wilson Audio, Martin Logan, KEF, Golden Ears.... McInstosh makes the best amplifiers in the world!
@@KhoaAudio62 Here in the USA, the amplifier alone costs more than 148 mil. dong (and the AMP is made in the USA). Your price is very good, if sold new.