Quote:
Originally Posted by DonH50 
As I said, the difference lies in this statement in their instructions:
"Connect your subwoofer to the left/right preamp outputs of your receiver or processor."
This sums the L/R into a mono channel to drive the (single) subwoofer. The rest of your statements I agree with. I'll try again: there are two differences in my setup:
1. I use two subwoofers, left and right. This keep stereo separation through the bass region. This does not really matter for the deep bass below 50 Hz, and reduces localization of the subs above that. Ages ago I found I could localize a sub somewhere between 50 and 60 Hz; others at different frequencies. With a steep crossover this is less an issue; with a gentler slope even crossed over at 50 Hz there is still signiificant content in the sub at 100 Hz as the sound does not instantly drop to zero on either side of the crossover frequency.
2. I use an active crossover so the panels do not see the deep bass. Their distortion gets very high when presented with high-level very LF sound, and limits their linearity and dynamic range for the rest of their frequency range.
If you have two subs but no external crossover you can easily implement (1) if you wish. I found in the past sending deep bass to my MG-IIIa's was not something they really liked (this was with music, long before the HT days).
I attached a picture showing the two schemes. I did not show the amplifiers nor distinguish between preamp and amplifier outputs of the AVR (should be obvious).
HTH - Don

As I said, the difference lies in this statement in their instructions:
"Connect your subwoofer to the left/right preamp outputs of your receiver or processor."
This sums the L/R into a mono channel to drive the (single) subwoofer. The rest of your statements I agree with. I'll try again: there are two differences in my setup:
1. I use two subwoofers, left and right. This keep stereo separation through the bass region. This does not really matter for the deep bass below 50 Hz, and reduces localization of the subs above that. Ages ago I found I could localize a sub somewhere between 50 and 60 Hz; others at different frequencies. With a steep crossover this is less an issue; with a gentler slope even crossed over at 50 Hz there is still signiificant content in the sub at 100 Hz as the sound does not instantly drop to zero on either side of the crossover frequency.
2. I use an active crossover so the panels do not see the deep bass. Their distortion gets very high when presented with high-level very LF sound, and limits their linearity and dynamic range for the rest of their frequency range.
If you have two subs but no external crossover you can easily implement (1) if you wish. I found in the past sending deep bass to my MG-IIIa's was not something they really liked (this was with music, long before the HT days).
I attached a picture showing the two schemes. I did not show the amplifiers nor distinguish between preamp and amplifier outputs of the AVR (should be obvious).
HTH - Don
Don,
I understand your setup but the forest view is
Run the mid bass from the center channel to the fronts
That is the big picture view
Ideally bass management in receivers would handle this properly but they don't
Magnepan is just giving you an idea on how to work around avr limitations, it is not the ONE way to do it
Using one or two subwoofers, active crossovers, external amps is a detail unique to your configuration
Two subs don't matter, if the bass sent to it is suitably low
Sending deep bass to the fronts is not ideal So you could do as you have done,external crossover
Or run the speaker wires to the sub and use its crossover
Or simply send the bass to both fronts and sub and see what it does
At suitably low levels it is not an issue, the Maggie's cant spit out really low suff anyway and attenuated the other stuff
On the other hand what you have done is implement the method in the optimum way with the cost of external components


































