Adding a resistor in a parallel wiring system

As I interpret the information provided at zeroimpedance.com, if the Zero is being used to increase the load impedance seen by the amplifier (as opposed to decreasing it) there is one and only one pair of output wires on the Zero that can be connected to the speaker drivers. The choice of 2x, 3x, or 4x impedance multiplication is made based on which pair of input wires on the Zero is connected to the amplifier. So it appears that you would not be able to connect the 4 ohm driver (plus any resistor you may place in series with it) to the Zero any differently than the 8 ohm drivers.

Regards,
-- Al

I see, I wonder whether it can be wired backwards. I'll test them tomorrow when I get them thanks

No, you definitely don't want to wire them backwards. That will LOWER the impedance seen by the amp, by 2x or 3x or 4x depending on the connections. So the 1.6 ohm combination of the four drivers would be seen by the amp as well under an ohm. See this paragraph in their FAQ.

Good luck. Regards,
-- Al

I see. Thanks. I think the increased damping factor as a result of the zeros could help. I'll add the resistor to see how it goes thanks!

Hi Al,

Thanks for all your inputs and help. The zeros are installed yesterday and they are great. To take care of the 8 ohm vs 4 ohm problem, I think I've found the ultimate solution. The 3 ohm resistor would reduce 50 watts of power (directly only to this speaker) to reduce to about 16 watts, which is not what I want. If all the other 8 ohm drives receives 25 watts, I want this 4 ohm to receive 25 watts also. Therefore, I will install a 1.5 ohm resistor which increases the power transfer to about 25-27.5 watt given the error tolerance of 5% on the resistor, which is reasonably close.

The new damping factor for this drive will be 2.5 and with the zero's 4x setting, this damping factor should go up to 10 or so, which is again, reasonably acceptable.

Is my analysis correct?

Thanks,
Ryan