I have a Coustic Power Logic 460 amplifier that's probably about ten years old, and I can't find technical specifications for it anywhere. Coustic doesn't even have the manual anymore! I'm specifically looking for power and impedance ratings. I know that it produces 98Wx2 and 250W bridged, but I don't know the impedance.

Coustic manufactured the Power Logic u Series (actually it's the Greek letter mu, not a regular u), as well. That manual is available online. The 160u, for example, operates at 2 or 4 ohms. Coustic was able to find information for the regular 160; it operates at 4 and 8 ohms.

I'm beginning to think that the u Series increased the wattage and shifted the impedance levels; however, I still don't know how the numbers on the front of the case are rated. Any ideas? Is this something that I can check with a multimeter?