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RE: How many people are NOT upgrading their crossover in the Maggie 1.6s

Pix, not that I use the speaker-level xover anymore but hoping to perhaps save you aggravation.

Since I had lost the old sweeps, several weeks ago I ran a sequence of tests to create some charts to share with someone with stock MMGs. What I did was to locate the original parts that came with my MMGs (original model). There were enough for one channel only. I also found other parts, including the inductors that I upgraded to in the early tweak days.

Both the original design MMGs and the newer MMGs use the same 2.2mH inductor.

I thought I remebered -- from the early tweak days -- that the difference in DCR did not make a meaningful difference in the response curves in this particular case. Since I no longer trust this braincell of mine, I made sweeps with both inductors this time again. The original is about .35 ohm DCR. The one I got later is .15 ohm or so.

There was hardly a measured acoustical difference in curves. Bottom output does tick up slightly with the newer ones. Yet, nothing that would anticipate the obvious improvemnt in actual use.

Now, from the past I already knew that the replacements do sound different, as in clearly better. They are not even a foil but just as good as the foils I tested in that role, early on. Which is why I can bring these inductors out and use them when not in line-level bi-amp; if something breaks the PLLXO config or I am testing. They are only less good than the PLLXO setup, which truly bests it (mostly in terms of clarity).

The point is that you may be able to get some inductors cheaply to try before going to foils. The ones I used are Erse Super Q solid core 16ga bacause the 14ga version was out of stock them.

OTOH, get this. Out of curiosity, I measured the capacitance of the 4 12uF Solen caps that came with my speakers (2 each). Some 13 years after they were built, they measure exactly 12uF! (Not that they sound good anymore, though) So, at least in those days, Magnepan insisted on precision values. I don't have a way to measure inductance, however.




Edits: 09/07/12
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