I'm also guessing this is a headphone amp, and the ASP selection has to do with some sort of spatial processing (possibly an iteration of, or a significant Meridian improvement to Dolby Headphone).

Regards,
Roger

861v8/HD621, Bluesound Node N130, Roku Ultra, Oppo UDP-205, Tosh HD-XA2, Thorens TD321/SME 3009/Shure Ultra 500/LFD Mistral, ATC SCM40As/C4CA/Active 10s/Bag End sub, AKG K872, Grace m903, Sony A1E, EquiTech balanced power supply, *extremely tolerant* SWMBO.