Question about Sony HT-A9

Yes, you can, several of them work, but only the Sony ones (sw3 and sw5). Which is a pity because their performance peaks at 60Hz and they weaken in low frequencies. So if a sub, then Sw5 ;)

LG Robby

Hi Mike,
Yes, you can connect a Subwofer. I opted for the Sony SW5 which is very good (the SW3 is also compatible).
I don't know if others are compatible as they connect via bluetooth.

I don't know if you can fit two Subwoofers on the system.

Have a nice day

Yes, you can connect only one subwoofer.

Yes, you can connect a subwoofer. But only the SA SW 5 or SA SW3