Magnepan Crossover Mod Approach?

Thanks for your responses, cautions, and emails. The input is very much appreciated.

There is nothing that I really dislike about the speakers. I had my boehringer outboard x-over rebuilt for my emerald physic CS 3 speakers and they improved considerably. I am pursuing a bit more top end extension and transparency; the mod can be reversed without damaging the speakers the way we are planning on doing it.

The speakers are in a large room ~ 2200 square feet They are 5 feet out from the walls and there are no near lateral walls.

Jaymark, have you considered moving up to the 3.7? It has the true ribbon tweeter, which has just the top end transparency and extension you're looking for. Or maybe a 3.6? I don't know how it compares to the 1.7, which I still haven't heard, but now that the 3.7 is out the 3.6's are going for very reasonable prices on Ebay.

Josh - I have not considered moving up to the 3.6 or 3.7; I can certainly go and listen to them at a local dealer near me and hear the latest model. Thanks for the suggestion.

Jaymark: If you haven't already looked, an excellent resource is the Planar Speaker forum over on Audio Asylum. The vast majority of postings relate to Maggies, and there are numerous threads on cross-over mods. One of the more popular was developed by "Peter Gunn" (screen name) who specializes in modifications for Maggies.