George, you don't list what your main kit is but if your main system has any G components, then the G12 extender should be what you are after. You just feed it back to your a G series component rather than plugging into the DSP33's.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).