Alternatives are properly Dolby Pro logic related. My Marantz has a centre spread option which works well to take the localisation away from the centre speaker to give a more even sound across the front. It’s not a Trifield replacement from memory; made too many changes to really remember but it was for some time my preference when I had an 861 / G65, although I did eventually gravitate to PLII Music after tweaking the centre and rear speaker settings.
Anthem have a music mode but I’ve never heard it.
Main: Marantz SR8015 / Polk Audio Reserve R500 / Bang & Olufsen Beolab 4 / Arendal 1961 1V / Oppo 203 / WiiM Pro Plus / Apple TV 4K
Spare: G68ADV, HD621,DSP5000.2 & DSP5000.2 HC. ATC SCM20PSL, C3C. Rotel RMB-1077. Bang & Olufsen Beolab 1 & Beolab 7.1. Kef Q150. Dynaudio Xeo 2.
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