I'm doing my first whole house audio install for a friend. He has Impedance matching volume controls already installed in the house. FWIW they're Atlas Sound DWS-8's. We've got four pairs of speakers that we want to power with an stereo receiver capable of driving an 8 ohm load. The IM volume controls are all set to 4X.
My question is this. Should I expect to see an 8 ohm load when testing with an ohm-meter prior to hooking this up to the receiver? The reason I ask is that I'm currently seeing about a 1.8 ohm load with my meter. This would be roughly consistent with what I'd expect to see if the IM controls were not doing any Impedance matching at all.
Do the L-stops alter impedance only when an oscilating signal is present? I suppose that might make sense but I'd hate to burn up an amp to find out.