Will I notice improvement with crossover mods?

Eldartford ..it looks like they use a different type of measuremnt for the zero ohm coils. I know you use 8 or 10 awg wire wound coils which are expensive. Not sure of the awg with the zero ohm coils... since they don't give any on the site..at least not in english .I am going by the values I used 12 awg copper foil inductors at 3.30 mh on the bass panels. The Denmark made Jantzen cross coils cost roughly $31.00 a piece. The zero ohm coil of the same value is $127.00 a piece. As far as caps go I think Audio Note is probably the most expensive. But this doesn't mean much since the less expensive Mundorf Supremes actually sounded better than the Northcreek Crescendos they replaced in my speakers. The Crescendos are reversable and the sound changes depending on which lead is used as the input.I still found this cap to have a loudness control built in as the reviewer did Capacitor review.When reversed the sound became a little dull and the air diminished to a degree.

The inductive high pass filter sounds interesting.Where did you find the information on this configuration?

Trelja ..roughly how many hours in your experience is the burn in on new coils and capacitors? I know some don't believe in this..just like they think all capacitors sound the same.Hearing is believing though. I think only a deaf person could argue they sound the same!

Bill with a schematic of the crossovers you can get your values. Not sure of the parts quality in your speakers. The easiest way to find out is to open them up. I am sure you can upgrade the parts quality and hear a noticeable improvement without changing the original crossover specs.

You have plenty of places to order parts from thats for sure. I couldn't find what I wanted at one site so I ordered from 4 different websites.

Gmood1, What are the Mundorf PIO's. I am getting the Mundorf Supreme silver/oil caps. I thought these were the top ones. Are the PIO the same thing or are they one step up or down?

Mitchb.. they are the same, PIO stands for Paper in Oil. The caps you have ordered are Silver PIO Mundorf Supremes.The next stepdown are the Mundorfs Supreme Mcap,3rd are Mundorf Mcap-Zn and 4th on the list are the original M-caps(the primary caps used in Sonus Fabers).

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.

I hear ya Eldartford..that's one reason I went with the Jantzen copper foil inductors. They are reasonably priced and claim to have almost zero FM distortion. They really opened up the Magnepans. It's tough to compare the stock Magnepan inductors which weigh maybe 14 ounces together..two for each speaker.To the Jantzens copper foils of the same value that weigh over 6 lbs ! Huge difference in weight and sound!