You have a data sheet for LL5801?

LL5801 is a 1+1 : 2 audio isolation transformer originally designed for Kungliga Dramatiska Teatern (Royal Theater) in Stockholm. Sorry, no data sheet. A modern replacemen is LL1527 or LL1588. LL5801 pinout and usage:

Pin configuration (transformer seen from component side with label readable)

    
4,  	3,  	2, 	1      	

    LL5801    

8,	 7,  	6,	 5    

(I am sorry, but I am unsure about orientation, as we have no samples left in stock.
There is connection between pins 1 and 2, but not between pins 5 and 6)    

LL5801 Usage (1:1)  
in+	pin 1  
in-	pin 4  
connect 	pin 2 + 3  
out+	pin 6  
out-	pin 7  
ground  pin 5+8	(Faraday shield)