Actually Griffith you are still only using 100W, but you are now getting 100w for the lower frequencies and 100W for the mids and upper frequencies, it is not a summation of both.
What speakers and avr are you using?
It has been noted on other forums that this simple process has helped some with less efficient speakers and/or less powerfull Amps/Power supplies in their avr's. I myself have not noticed much of a difference with the M80s and Denon 3808, at least when I tried it a few years ago.
Hey Jake I am using a rotel rsx 1560 to power the M60 as fronts QS8 as rears and VP150 as the center. I used to have 1056 which was rated 75 watts all driven and the M60s would strain at the higher levels with it too. It was still doing it with the 1560 at 100 watts all channels driven till I did the bi-amp thing I honestly don't know why it helped but it did.
Griff, you're not crazy, but whatever you've noticed definitely isn't "bi-amping". The procedure that you followed doesn't double the available power, as your PS implies; the actual power increase is zero. A 7.1 receiver has one amplifier with seven channels of output transistors, not seven separate amplifiers, and you didn't have any "unused" amplifiers. The output transistors in each channel have no power of their own; they act only as valves to let in the required amount of voltage from the one power supply section. Using two sets of "valves"(one previously not connected to a speaker)rather than one can't increase the capacity of the power supply section in any way.
I'll throw out a remote possibility that some of the output transistors for the main channels weren't up to spec and were causing distortion at less than the rated power output. When the output transistors in the back surround channels(up to spec?)were put into use they allowed the rated power to be delivered to the section of the speaker to which they were connected, allowing cleaner reproduction of those frequencies. Again, this is highly unlikely speculation, but if you'd like to try using only the back surround output transistors to see if they alone make a difference, this is easily done. Disconnect the speaker wires from the main output terminals(keeping the receiver in "bi-amp" mode, of course)and replace the connecting links on the speaker terminals so that the the back surround channels(now carrying main channel content, of course)drive both the high and low frequency sections of the speaker.
Fairly easy to do I just unplugged one set from the back and installed the metal bars back. listened with both sets back and forth, the M60s strained at the higher volumes with both sets it was extremely loud though
If an amp has a rating of 100w x 2, its not suddenly going to change to 100w x 4 because you add more wires and channels. All the juice still comes from one power supply.
I agree completely but I thought if it was rated 100x7 and you used 2 channels to power 1 speaker it would be equal to 200 watts. I understand how I could be wrong, but for whatever reason it helps me out