I want to use wireless transmitter for rear surround speakers like QS4/8's. Will I get good result?

If your goal is to minimize the wires, then you'll have a good result. Keep in mind, though, that the receivers that you need to connect to the QS4/8s do need to be powered, so you'll at least have a thin black cord running to the speakers.

If your goal is to have great audio, then your result might not be so good. I can't speak from personal experience, but I have a feeling you won't get the same fidelity from most wireless audio transmitters as you would with speaker wire. There may be some great products out there though. Did you have a specific product in mind?

It sounds very appealing to me, at least as a B speaker kit. If you already have the kit, I see no reason why it would perform poorly with the QS8s, assuming it performs fine with your existing speakers. And at $100 a pop, it's pretty much a no brainer.

In general, I think I would prefer a solution with a line level input in addition to the speaker level, but for a surround setup, it might just work. Be sure to pay attention to the addendum at the end of the review off of the Rocketfish site--looks like there could be issues with regularly powered receivers as opposed to HTiBs.

Peter--see the title of the thread.

Based on the specifications I don't think your going to get the performance most people would want when buying such good speakers. Will sound come out, yes.

Further reading on the review indicates that the decent receiver/impedance problem has been fixed.

There are a few other possibilities out there for wireless, but I don't know that anyone on these boards has actually tried any of them.