I thought I would jump in here. I have a pair of ML Montis stats with high end electronics and quality cabling. I use an Oppo 105 for DA, a very cost effective choice if you don't have $ for the best conversion. I have a HTPC with clean P/S, filters and a special USB card. I am a academy...
One of my Montis panels has, over the last few months, been losing its overall level and HF. I vacuumed and cleaned it in place using no residue Electrosolve cleaner, the one I use that is safe for most synthetics, glues and electronics. It made no difference. I swapped panels to insure it...