Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems Balanced from 861v8 to unbalanced 258 power amp

For XLR to RCA cables, you have two types; Shorted and Open. I'm going to assume Open (on the -Neg differential wire) would be correct.

Outside of that, your other options are active and Passive XLR to RAC converters, these retain the noise suppression of XLR (if required).

Passive options are transformer based, while active are typically op-amps. would avoid a cheaper transformer based solution (they will induce noise at low frequency), personally used Jenson ISO max series with no issues.