One of my earliest builds was a Sunn Beta Bass (one channel):
		
		
	
	
		
 
	
After that, I wanted to build a "full" Beta Bass Preamp.
I used the Factory Schematics to create a pcb:
 
Then I used a milling machine to create a enclosure:
 
done:
 
 
				
			 
	After that, I wanted to build a "full" Beta Bass Preamp.
I used the Factory Schematics to create a pcb:
 
Then I used a milling machine to create a enclosure:
 
done:
 
 
 
	 
 
		 
 
		
 
 
		 
 
		