Balanced v unbalanced input to Ayre preamps


I've been using unbalanced connection between an Oppo 205 and Ayre K-5xeMP preamp, but wonder if the sound with balanced might be superior.  According to Oppo Tech the sound with the balanced or unbalanced outputs from the 205 should be identical, presumably at reasonable cable lengths.  But is the same true with Ayre preamp inputs?  

I'm hoping to replace the K-5 with a KX-5 Twenty to match my VX-5 Twenty amp; the KX-5 has more balanced inputs.  An Ayre C-5xeMP and Sony HAP-1ES use the two balanced inputs of the K-5. 
Ag insider logo xs@2xdbphd
Ayre gear is optimized for balanced connections and always sounds best when run fully balanced. If the Oppo is truly balanced (dual differential), then you'll get the best results that way. 
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Bob,
The surgery was successful, and I have not experienced any pain since.  The worst part was the 3-week taper off the opiates.

ciamara,
The Oppo 205 is claimed to be fully, i.e., dual differential, balanced.  I may use a passive switch for sharing a balanced input between the Sony HAP and the 205 until I get a KX-5 Twenty that has additional balanced inputs.

db
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Good link to the Benchmark objective test. I suggest to try yourself with an inexpensive star-quad cable, or even to go to audiosensibility.com for a star-quad cable made with Ohno contiuous cast copper and Teflon insulation at a reasonable cost.