I recently upgraded my integrated amp and, while shopping, came across a demo Focal SW800v subwoofer, which is the companion unit for my speakers. While it is rated only to 32hz @3db (27hz @6db), the price was right, the finish is an exact match to my speakers (WAF) and the seller was willing to let me return it if I do not like how it sounds.

My new amp manual (Marantz PM 11S3) does not specifically discuss hooking up a sub for a 2 cannel setup, although has multiple diagrams for multi-channel. There are left/right pre out rca jacks which I plan to use. Some questions:

I intend to place in the corner,which is about 8 feet away from the nearest speaker (speakers are about 7' apart), and about 13' from listening position. Should I position the speaker to fire straight out or pointed toward listener?

Speaker cable run is about 20'. I need RCA jacks at both ends. Anything special I should consider before buying cables?

My speakers (Focal 836v) are 3 way 8ohm rated down to 40hz @3db (33hz@6db). Crossovers are at 250hz/3000hz. When tested by Stereophile, these had a dip to 3.3ohms at around 110hz (one of the reasons I upgraded amp). Does any of this info give me insight as to where to set crossover for sub, or do I just go by ear?

I know this is not the lowest dynamic range sub available, but it does put my system into the dynamic range of the next step up in the Focal line (Electra 1038BE) for a tiny fraction of the cost, and I do not intend to use this for anything other than music. I am hopeful that this sub has the Focal sound that drew me to their speakers in the first place.