Sorry Eldartford, it's not ignorance, but rather observations with my system. I have played the game with trying to use transformers to achieve balanced signals out of DACs. And the result was a loss of low-level detail and truncation of harmonic overtones.
Once a device takes away detail, and I can survive without it, as far as I am concerned, it is junk. For high resolution system, transformers in the signal path absolutely affect the sound. I suspect this would not be observed with a system loaded with other bandaid devices such as equalizers.
Comparing advice from electronics professionals and their theories vs. observing the affects on such system configurations are very different worlds. And as much as a "corrector" may be a temptation because it looks good on paper, it often gets removed from the system. An example of this or me was the Rives PARC.
Rather than trying to tweak the circuit to accommodate a pairing of balance and single-ended devices, my advice is to use products of the same topology.
The advice to hunt down another D115 or D250 is good. Perhaps you might even find the rare and coveted M100s, a mono block version similar to the D115. The SP-10 and these amps are absolutely outstanding products. Don't piss away their musical magic through other attempts at "correction".
