For XLR/RCA adapters, I own both this Purist set and this Cardas set. I experimented for about a month of alternating the two sets – allowing time for each to settle-in. The Purist adapter was more neutral, more solving. The Cardas adapter was more warm, less resolving. This was in my system. YMMV.
Of course, cost/performance ratio is subjective. The Cardas set was around $140 per pair. The Purist set was $300 per pair. Worth it to me for better SQ. But I did not compare the Purist to this other more expensive Cardas set. They weren’t around when I did the comparison.
IME, avoiding adapters is the best approach.
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Also, I tried these much cheaper Neutrik XLR/RCA adapters. They affected the SQ very poorly – way less resolving, almost muted. They took the timbre and sparkle away. I took one apart. The internal connecting wires were ridiculously thin and very low quality.
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052rc is on target. When using an XLR/RCA adapter, confirm that the pin configuration is correct for your particular unit.

