My regular job is providing mobile sound for bands, but I've been given the opportunity to do a small install in a retail space. I know that many of you will want to yell at me for trying to do this when it's not what I normally do, but it's an extremely small job, and I'm not doing it to really make any money, but simply to dip my toe into these waters and give my friends shop a good deal.
The shop is very small, and they want the music volume to be pretty low, so I'm planning on installing just two JBL Control 65P/T's. I may also add a single QSC AD-S52 outside if they decide they want it and it's in the budget. With only three speakers, and the small size of the shop, I'm considering just running the speakers at 8ohms. The shop is about 25'x25', but has pretty high ceilings with metal I-beams. The ceiling is black, so I'll most likely conceal the cable by keeping it tight along the beams. There is a covered lofted area above the register where I can keep the amp and it will be relatively close to the ceiling. The computer where they will be playing the music is directly below this. I thinking about putting a passive volume attenuator on the wall for them next to the computer. If they opt for the outside speaker I'll probably put it on it's own channel on the amp, and put the two indoor speakers on the other side.
So my main question for the real pro's is, am I right in thinking it's simpler to do this job at 8ohms? Can I save them significant money on cabling with a 70v system? What do you think of my plan in general?
Thanks