Originally Posted by
David Analog
Not a good idea to run six coaxials off of the four highpass channels of the HD900/5. That amplifier should be restricted to four symmetrical 4-ohm loads. Unlike the HD600/4, the HD900/5 has one power supply for the front and rear channels. A lower impedance on two channels will bias the power supply rail voltage of all four channels and yield LESS overall power. Note that the 4 X 100 2 4-ohms power drops to 4 X 75 with a 2-ohm load. That's a bit misleading but using asymmetrical front and rear loads is a definite No No.