RE:
" I have recently purchased a Baldwin Model C-1 Custom. The original speakers are 4 ohms. They need replaced, but I cannot find any 4 ohm 12" loudspeakers. Any suggestions? "

The best thing to do is have them reconed. 4 Ohm accordion edge speakers are hard to find and the amp wants to see a 2 ohm load to get full power transfer.
Hope this helps,
Mr. Lynn

The Baldwin amp head is probably a C-3 model. I've omly seen one of them. The C-3 was built on PC board, rather than " Holey Board " like the C-1 "Professional ". It belongs to the son of the Baldwin factory Plant manager in the 60's. I think I may have a scan of the C-3 schematic, also.
Mr. Lynn
a new guy here, hope I'm not out of line jumpin' in here

Hi,
I'm new here, but, have scans of the original Baldwin schematics and a lot of NOS Baldlwin Amp parts. My day job is in tech support for USA built Baldwin organ products. I've restored a few of these amps in the last 10 or so years. If someone wants to try building a similar amp, I have NOS power and Interstage transformers. Also, PNP Germanium TO-3 output transistors, all from old Baldwin stock.
If anyone needs it, I can email the larger scans.
Later,
Mr. Lynn