Will I notice improvement with crossover mods?

By the way, the best quality parts cost for MG1.6 inductive high pass filter is about $25. My parts cost for the equivalent capacitive version was $105. Interesting. I may try one and see how it sounds.

Trelja...Agree that heavy duty air coil inductors are "magical". Mine made $300 disappear!

Seems like capacitors are a can of worms! I decided on Hovland musicaps for my MG1.6 partly because they were of smaller diameter and greater length so that they fit nicely into the crossover cavity. I am happy with them.

One way to avoid the capacitor can of worms is to use a parallel inductor instead of a series capacitor. "Look Mom, no capacitors!" I saw a comment on AA describing such a crossover, with favorable comment.

Does anyone here care to comment?

Gmood1...It's not clear to me that a zero ohm coil would differ significanly from a 0.05ohm coil. Too much of a good thing. I assume that the zero ohm coil can be purchased with Confederate dollars.

The prices on Mundorf components do not seem out of line for this kind of stuff (which is probably overpriced everywhere). I paid more for my Caps (Hovland) and for my coils (North Creek). So, of course, they must be better :)

The inductive high pass filter can be visualized as a second order filter (series cap and parallel inductor) with the cap replaced by a resistor on the order of 4 ohms. The resistor needs to be rated at 20 watts or more, because it will take the LF power. Another way to look at the filter is as a series crossover, with the woofer replaced by the resistor. The drawback of this configuration is that amplifier power is "wasted" heating up a resistor, but watts are cheap these days. The inductive high pass filter might be a good choice for protecting the tweeter in a biamp setup, where power amp gain would be easy to adjust to account for the 6 dB lost in the resistor. Also, with the amp being driven with the HF signal from an electronic crossover, there would be little LF power to be absorbed by the resistor.

Gmood1...The 3.0mH inductors from North Creek AWG10, DCR=0.17 (which I used) go for $74 each. AWG 8, DCR= 0.1 at $127 was too rich for me.

The stuff about inductive high pass filtering was on the Audioasylum Planar forum, a posting about MMG.

The zero ohm coils may use quite small wire as they appear to use some type of magnetic core material.

The Jantzen inductors tempted me, but in the end I was swayed by Magneplanar's (and others) recommendation to avoid foils.
If I do make an inductive high pass filter for evaluation I think that foils, probably Jantzen would be appropriate.

sean...I did outfit my speakers with AWG10 coils and fancy capacitors and I do think that performance improved, although I can't say that the slight change I made to the component values (crossover frequency) might not be the reason.

However, do you have any technical explanation regarding WHY a coil with 0.15 ohm DCR should sound different from one with DCR 0.65, apart from slightly less attenuation (so that the volume control needs to be cranked up a bit)? It's been noted that after passing through the coil, the signal traverses some hundred feet of very fine wire called a voice coil (or in my case fine wire glued to a mylar diaphram). Why does the DCR of the coil matter?