Accuphase F-25 Active Crossover, any experience?

cosmicjazz, I think it is a mistake to play around with it. Accuphase equipment is build to the highest level of quality. Unless something fails leave it alone. Chances are you will only make it worse. 
IMHO the best use of an active crossover is for subwoofer management or when building your own speakers. 

Thanks, makes sense, was taking a look and the build quality indeed appears to no need service for many many ears... maybe same applies to the F-15L that is a late 80's product...  considering purchase one..

I thought I would share something with the worldwide Accuphase F-25 owners:

There's a fellow on ebay who is designing custom frequency boards:

 https://www.ebay.com.au/sch/i.html?item=176162213418&rt=nc&_trksid=p4429486.m3561.l170197&_ssn=aaanekre0047

 

Frequency Board for Accuphase F-20 F-25 with custom frequency option

Ebay seller name aaanekre0047 located in Norway.

I have bought boards from that seller for my F-25 and can highly recommend his work. His price is very reasonable as well.