can some one please explain to me , what the ohm rating on a speaker means, and what speaker can connect to which ohm rating on a receiver.
Polaris has it right but I want to point out that any good quality name brand amp will be fine with 4 to 8 ohm speakers. Most speaker manufacturers use 4, 6 or 8 ohm numbers but the truth is that the speakers can range from 2 to 20 ohms regardless of what the manufacturer rate them at. My point is, don't be too concerned with resistance (impedance) ratings. Get a good quality receiver with good quality speakers and you'll be fine.