Originally Posted by bstep
... you guys recomend Wharfdale which have an impedance of 6ohm and rx-v has 8ohm impedance. I don't know how much of a strain will that be on a receiver (if any for a 2.1 system), but all the articles I've read about all of this mention to match the impedance.
Okay, so, I looked into this ohm-matching thing too but what I found was that the difference between a 6ohm speaker and an 8ohm reciever was nominal (no pun intended). My Marantz is rated at 8, but the Wharfes pull 6 - and I didn't let that stop me.
The ohm rating is a result of the design, and as long as you are not trying to push 4ohm speakers with an 8ohm amp/receiver then you should be okay (and if you have a good quality amp/reciever you could still be alright). The risk, as I understand it, is in overheating your amp.
Tube amps are more sensitive to this than solid-state amps, from what I've gleaned. But I came to the conclusion that the difference between 6ohm speakers and a good 8ohm amp is nothing to worry about. The ohm-rating is a bit of a game as ohms fluctuate anyway.
I guess, in the end, I put a bit of trust in brands that I felt are of good-quality and didn't worry about the numbers all lining up.
Are you finding any 8ohm speakers that you like? I think Infinity makes some and that's a well respected brand (as far as I'm concerned).
P.S. - The Monitor BX2 bookshelf speakers are 8ohms - that would be tempting to me as they were a close runner-up to my Wharfes anyway.