MusicSteve

Also The Rp-250 and RP-5000 the woofer are wired in parallel (8 ohms /2 = 4 ohms total) The Rp-450, Rp-504 - Uses two woofers that are wired in series and the other ones are to (2 inside woofers and 2 outside woofers) so 4 ohms +4 Ohms=8 Ohms per set, so 8 Ohms in parallel w 8 ohms = 4 Ohms total So the woofer are not the same and can not be be switched between speakers even if they are 5 1/4" woofers Note - this example is dc resistance and is not the same as impedance Also the speaker that have one woofer the RP-500m and RP-150 also use the 4 ohm woofer The theory is that w a smaller box you need more energy /less ohm to get the woofer to move so they are the same as the RP-450 and Rp-504.