we all know this has been asked so many times:
"I just purchased the LSi xx, will my 100w/channel Pioneer/Denon/whatever receiver power it?"
You have to ask yourself a few questions to answer your first one:
- Do you like good sound?
- Do you want to get the most out of your speakers, or just enough to hear them?
- Do you have a fire extinguisher that is fully charged?
- Did you allocate some of your total budged to a good amplifier?
- Is your receiver DESIGNED (not just tolerant) for 4 ohm operation?
If you answered no to any of those (except #3), then yes you can use your receiver to power your LSi speakers.
It is pretty much a unanimous vote on the forums that to power your LSi speakers you need real power. This is power that can only be given by a dedicated amplifier, or a real integrated such as NAD which are designed to run 4 ohms.
Why do you ask? Well most receivers aren't rated to run at 4 ohms, and those that are "capable" do so by limiting the total current available, thereby restricting your performance. You also have the danger of overheating your amplifier, and toasting both it and your minty LSi's. Running a real amplifier such as an Adcom 555 or the like (take your pick as long as it's designed for 4 ohms) will give you the correct amount of power, both watts and amps to drive your speakers. Not only will you get the full quality from them, but you won't have the danger of overheating.
What's this about pre-outs you say? Well most people prefer to still use a receiver because they will want to use it in their home theater setup still, and for their ease of operation. To use an amplifier with your receiver, it needs to have PRE-OUTs for the channels you wish to add the amplifier too. Simply look on the back and look for preout connections for L/R/C/RS/LS and so on. If you only see sub preout, you don't have preouts at all and need to purchase a better receiver. Don't run out and just buy a new one, consider used ones of a higher caliber as well. That's another article to be written later.
On the budget part I mention if you allocated some to an amplifier. A lot of people go out and purchase the LSI's and don't think about what they'll power them with. This is akin to designing a Ferrari and only allocating 5% of the budget to designing the engine. When you purchase speakers, remember it's synergy of the system as a WHOLE that will give you the sound, not just the speakers themselves. Amplifiers range in price all across the spectrum. You can find nice used ones sometimes on the flea market for $200 if you're lucky, all the way up into the thousands for you crazy people who have more money than sense. What amp you pick is up to you - I'd search the forums for reviews as there are many. There's no sense in asking again, it's been answered so many times.
So in short - no your receiver isn't going to power your LSi's very well. If you want to get the most out of them, use a dedicated amplifier and let them do what they're made to do - sing. If you want to use your receiver, that's also fine. Just make sure it has preouts. Connected to an amp.
P.S. The fire extinguisher thing is no joke - if you drive LSi's too hard with a wimpy receiver, expect smoke at the least and a nice electrical fire at the most.