I have spica angelus speakers, how do I know when the cross over needs rebuilding?

Just went and looked,  here is the last contact info that I had for Jon.... My not be accurate any more, this was 20 years ago. Tim 

Email: John Bau   sales@linearz.com 

Phone: 505-988-5233

PRECISION SERVICES
Santa Fe, NM 87501

Wasn't Spica sold to Parasound?

It was,  Jon was doing Precision Audio Services and later changed to Precision Sevices.  Jon was very good friends of one of my best friends.  I met Jon through him. 

He could probably make some money if he resurrected the brand and did Mark II versions of the TC50 and the Angelus.

I heard S. Angelus on several occasions and while it was an exceptional speaker for the price a number of years ago, I feel replacing it with something new (or even a vintage speaker of better quality) would be a better choice- they just sounded "indistinct".  Even many small monitors these days get exceptional reviews while lacking just a bit of low bass- and more often than not, this is not regarded as critical on many types of music.