Yes, I the Paradigms are 8 ohm speakers and are fairly efficient. However, I still maintain that you would get the most out of your Paradigms if you gave them a dedicated amp. If you can't afford a nice big 5 or 7 channel amp, you can always opt for a 2 channel or 3 channel amp for the fronts and let your reciever power the surrounds. They can handle 500 watt amps, so you're not going to fry them. And speakers at the quality levels of the Signatures really show their true colors when they have a beefy amp driving them.