Well, they have three wires each: black/green/white on the neck, and black/green/yellow on the bridge. The included diagram is for a classic J wiring, so I was looking for an appropriate diagram for my wiring (which, by the way, I find the best for my needs).
Anyway, next days I'll be on the road (with my double bass), monday morning I'll put them on the bass and ASAP you'll receive news about them.
I chose the s55 because, in the noiseless/splitcoils area, because of their good reviews and beacuase of the good price/easy availability (I'm in Italy, but usually I buy from a very huge german online shop). I've been very happy with DiMarzio Model J (I have them on a Squier CV J), and I also tested the Ultra J, which are very good but not the kind of sound I was looking for.
Let's keep in touch.
Ibanez Club member #587 - Classic Vibe Club member #26 - Short Scale Bass Club member #213 - Danelectro Club member #8