The subject is balanced to unbalanced? If noise cancelling is wanted it is the receiving end that needs to be differential. The sending end is of less importance. Please, take o look at www.jensen-transformers.com/an/an003.pdf .
If you want some good quality transformers at flea market prices, look around for some old Altec/Peerless 15335As. I've seen them on eBay for less than $10. These are a 1:1 15k:15k bridging transformer and of very good quality.
If you can't find any or it's still not cheap enough for you, just make a simple XLR to RCA adaptor cable. Center pin of RCA to XLR pin 2 (or 3 depending how it's wired for positive versus negative) and the ground of the RCA to XLR pin 1. If you're using a shielded cable, terminate the shield only at pin 1 on the XLR end.
Done deal. No chips. No power supplies. No hassle.
se
If you can't find any or it's still not cheap enough for you, just make a simple XLR to RCA adaptor cable. Center pin of RCA to XLR pin 2 (or 3 depending how it's wired for positive versus negative) and the ground of the RCA to XLR pin 1. If you're using a shielded cable, terminate the shield only at pin 1 on the XLR end.
Done deal. No chips. No power supplies. No hassle.
se
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