This is a list of the best Spica resources I am aware of. I am always looking for additional links. Do you have something that belongs here? .
Information
Spica Loudspeaker User Group - Yahoo Forum 
SLUG is a great resource for all things Spica.
Note: This very knowledgeable group is eager to
assist Spica fans. You will find frequent references and
information from the SLUG site on these pages which used
with permission from its organizer.
Speaker Rebuilders
These are speaker rebuilders that are routinely recomemnded in the forums. Any of these guys can take care of a fried voice coil. Note: I am not aware of anyone that can replace the butyl-rubber surrounds found on the TC-50, if you have a source, let me know - !
Millersound: www.millersound.net
Bill Legalle, is routinely mentioned on SLUG as one of the best:
1422 Taylor Road,
Lansdale, PA 19446
(215) 412-7700
The Speaker Exchange: www.speakerex.com
I received a glowing review of the work this company did on a Angelus woofer. The Spica owner said "..they handled my Polydax 8” driver with loving care. I highly recommend them". Apparently the cone was split and the Speaker Exchange was the only resource that would consider repairing it.
1250 E. Hillsborough Ave, Tampa, FL 33604
1-800-849-6972
Tri State Loudspeaker: www.nauticom.net/www/speakers
I have talked to this guy on the phone and he seems to do a
lot of Spica TC-50's .
650 Franklin Avenue,
Aliquippa, PA 15001
(724) 375-9203
Carl's Custom Loudspeakers: www.classicloudspeakerservices.com
Located in Northern Connecticut to serve all of Connecticut and Southern Massachusetts. If you live outside this area, please write or call to discuss options for shipping, delivery and pickup.
(860) 986-9156
If you find this site helpful, why not put a link to my website on your web pages such as: (more about Spica Speakers)?
Speaker Parts
Chokes Unlimited: www.chokes.com
I haven't done business with these guys but it looks
like the RGT5000 and RGT5025 would be good replacements for
the original versa-tronics 901 terminal cups.
GR Research: www.gr-research.com
Replacement tweeter with matching crossover with significantly upgraded components in a kit. They also offer components to upgrade your existing
crossover if you are just trying to replace aging components.
Speaker City: www.speakercity.com
No experience with these guys, but they have
the goods!
Madisound: www.madisound.com
Purchased from these guys on several occasions, they offer
mostly raw drivers, good service and no hassle returns.
Parts Connexion: www.partsconnexion.com
Purchased items from this company on several occasions, no
problems. High quality electronic components.
Parts Express www.partsexpress.com
Purchased items from this company on several occasions, no
problems. They offer a wide-range of speaker building
supplies, grill cloth, damping materal, gaskets, acoustic
stuffing.
Simply Speakers www.simplyspeakers.com
I have purchased speaker grill cloth from these guys, no
problems. Wide range of speaker builder parts.
Cables
Better Cables BetterCables.com
No direct experience with these guys. Nice selection, free shipping. Review of their cables here.