Has anyone hired cyrix7x86 on Ebay to "upgrade" their crossovers?

Thanks for your reply. My other question is if an "upgrade" translates to a noticeable difference in the quality of sound being produced by the speaker. I imagine that the component parts of a crossover do not deteriorate over time - or am I mistaken?Paul

Thank you for sharing your knowledge. Now I have to find out if our friend on Ebay has considered the DC issue AND actually "ear" tested his crossover upgrade for the SL700

I never did use his services. I decided I did not want to take a chance and mess with the already wonderful sound of my Celestions.