Join Date: Sep 2014
Location: Crooked River Ranch, Oregon
Trying to keep it simple and basic, paralleling your speakers halves the resistance, so a pair of 4ohm speakers paralleled presents 2 ohms resistance to the amplifier. Depending on amp design, this usually results in a doubling of the output power from the amp. You will not be getting 100 watts to each speaker, but 200 watts to each pair. Sound is exponentially logarithmic. Doubling your power generally only adds a 3dB increase in sound, which would generally be considered only a "perceptible" increase in sound. You may get a bit more than that, as paralleling speakers generally gives a very slight increase in efficiency also. If you want to double you volume level, you will need 10 times the amount of power.
Rest in Peace Michael Wade