[Cristian135]

I have replaced the front speakers with focal es100k, the center speaker by eton b100xcn and the front has much improved and the treble do not disturb as before, on the back and put a morel coaxial 4 "speakers have a sensitivity of 85db, sound less than the original harman kardon but they sound much softer and less annoying, they are a good filling in the back part.