A:Answer Hello Keith123,
Thank you so much for your inquiry!
If your Onkyo HT-R593 Receiver has a special jack for an active subwoofer (like a MONO OUT jack, MIX OUT jack, SUBWOOFER jack, or SUPER WOOFER jack), then yes, you can use this subwoofer as a replacement subwoofer by connect the LINE IN jack of our SA-CS9 to one of those jacks using its supplied audio connecting cord.
And yes, the SA-CS9 115W 10” Active Subwoofer (US model) has a 120 V AC, 60 Hz power requirements.
I hope this helps! Thank you!
- Romeo