Connecting Gold Phantom to an amp and/or sub

[ogs]

If bass is too strong the placement of the speaker in the room is probably part of the problem. If you cannot move the speaker due to furnishing your only option is using an equaliser based on measurements. Again a MiniDSP SHD would help you here. REW (Room Eq Wizard) with a UMIK-1 is good for measurements. I believe REW can export EQ directly to a MiniDSP unit.
Adding a subwoofer would most likely complicate more than solve things.

I am leaning towards an equaliser also, but from what I see in the pictures, the MiniDSP SHD does not have any optic outputs (hope I'm saying this right), only digital and analog, whereas the phantoms have optic inputs.

That is correct. The SHD does not have optical outputs, but a coax to toslink converter will do the job here. I believe @ragwo is using one with his Phantoms, a Cypress DTC-2. https://devialetchat.com/Thread-Phantom-...9#pid95359