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In Reply to: Requesting MMG crossover advice posted by 40for60 on April 20, 2007 at 17:14:32:
I recently tried some .1uf Mundorf silver in oils as bypass or add ons to my MMG external xovers, they added air to the treble and brings out more detail in the mids.I was in the process of doing some cap roll in my preamp in another system. So I was tring to put some burn in time on them.
After I did the swap, I tried the Audio Note copper in oil .1uf that came out the preamp, in the MMGs.
They were much smoother with less tizzyness in the top end.
So stay away from the silve rin oils.Your bass might get better as things burn in more, if not double check you polarity. That can be very tricky, as carefull as you may think you were.
You have done good so far, this is just the beginning.
Follow Ups:
Another member used a paper-in-oil shunt cap (from Allied) on his MMG's and he reported that the bass quality improved.If you don't want to try the Allied paper-in-oil cap, they're kinda big, try a pair of better quality 12uF caps. Multiple smaller caps should out do a single large one.
Thanks for the suggestions.I think I was pretty careful about the polarity, and I'm pretty sure I got it right. However, to check it, which wires do I switch? The midbass +/- on one speaker, see if it is better, if not the other one? Same with the tweeter +/- ?
Reverse one mid/bass first, see how that sounds, then reverse the other mid/bass to match the first one. See how that sounds.
See, its not just the polarity betweem the mid/bass drivers that have to be right, polarity between the tweeters and the mid/bass driver has to be right too.When I did mine I was very carefull to keep everything as straight as it was. However I guess because I went from the new crossover design back to the older one, when I first powered them up everything sounded confused. So I had to make the polarity changes.
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