Martin Logan Tweaks / Upgrades

I agree with johnsonwu.

check out this site for some ideas:
http://www.martinloganowners.com/forum/

For those who value time alignment, don't bother with this nearly no-cost mod. Lower the front spikes and extend the rear spikes so you can make the panel vertical. Read about that on the Martin Logan Owners website many years ago; did it and loved it and that is where they have been for many years. I did change the power cords and found a minimal change. However, I did it at the same time I changed all power cords in the system so I can't really isolate the affect it had on the speakers. 

George, that's an interesting tweek. Not exactly the most aesthetic thing to do to a beautiful speaker though.

BTW, I have Vantage's.

Thank you!

@johnsonwu - What audio grade substitutes do you recommend? 
And is there a manual or a diagram that I can follow? 

Shawn,

Rebuilding crossovers can be done, at cost. Getting a schematic from ML is unlikely so you'd have to figure it out from your existing networks, and replicate that, but you would need to rebuild the whole thing. My ML Spire project is on the MLO Page linked above, and plenty more can be done, but you may as well just put that money into a better ML model such as a used pair of Spire or even Montis / Summit.
Regarding the rake angles referred to above, tipping the speaker up to vertical does impact on the sound but it can very quickly become unbalanced and fatiguing, myself and several other have settled on a panel angle of 87-88*. Placing the speaker on an aftermarket isolation base can bring improvements also, such as Max Townsend's stands.

My Spire rebuild:
http://www.martinloganowners.com/forum/showthread.php?9600-Spire-with-External-Crossovers-amp-Electr...

Ack's Odysseys rebuild:

http://www.martinloganowners.com/forum/showthread.php?12761-Modifying-the-Odyssey-crossover-my-adven...