1) Treatment, which you already have.
2) Mutliple subs, either through Geddes’ approach or the standard symmetrical one.
3) EQ. If wanting to use it also as your DAC/pre-amp, the MiniDSP SHD with DIRAC is high enough in quality where it can be considered audibly transparent.
You should always take multiple measurements, but 90% should be around the main listening position, with some spurious measurements in other seating areas (which aren’t close to a side/rear wall).
2) Mutliple subs, either through Geddes’ approach or the standard symmetrical one.
3) EQ. If wanting to use it also as your DAC/pre-amp, the MiniDSP SHD with DIRAC is high enough in quality where it can be considered audibly transparent.
You should always take multiple measurements, but 90% should be around the main listening position, with some spurious measurements in other seating areas (which aren’t close to a side/rear wall).