Originally Posted by bigbrain28
Howdy Folks. Noob here, at least to the Polk forum. I JUST ordered 3 LC80i's for my new house. I have been all over and heard a lot of in wall/ceiling speakers and they all sounded hollow. Sound Advice (Tweeter)'s "special room" was less than impressive. The sales guy was trying to sell me Boston's 585t2's they had on clearance for $388ea. I had to pas, mostly because what I heard was bad... At another location I got to hear several sets which sounded just as bad (various makers) then the LC80i's. That was the first time I was actually impressed. Of course now its a $399ea speaker. Yikes. Found'em on eBay for $250ea, so I bought 3 for the rear. I hope I have not wasted $750, but EVERYTHING I have (found to) read about them makes me think I did the right thing. They will be driven by the Yamaha RX-V2600 I bought from Overstock ($707 - shipped!!!).
Anyone have personal experience with these speakers they care to share? Good/Bad/other - Any install tips (aiming, etc.) greatly appreciated.
As in the case of the Denon receiver, I believe the your Yamaha receiver is only rated down to 6 ohms, whereas the LC80i's are 4 ohm speakers. However, it may be able to drive 4 ohm loads based on this review by Audioaholics.com, Yamaha RX-V2600 Receiver Review
Here are some excerpts from the review that may be of interest:
This is the place where you can set the RXV2600's output impedance to either 6- or 8- ohms. We recommend leaving this in the 8-ohm setting regardless of your loudspeakers, unless you are truly looking to overdrive the Yamaha amplifiers on low impedance speakers.
Frankly, I don't follow the point the reviewer is trying to make about low impedance speakers. If it has a 6-ohm setting, why wouldn't the user use it if his/her speakers were rated at 6 ohms?
Fan Operation Mode
You can tweak the Yamaha to operate in AUTO mode (default) whereby the fan comes on automatically based on the temperature of the unit, or CONT continuous) to engage the fan permanently (for use in smaller equipment closets, etc). Note: After running the RX-V2600 for a while I noticed that it runs quite hot, so give it plenty of ventilation and consider using the continuous fan mode if you plan on shutting it up in any sort of entertainment center or enclosed space.
Since the receiver apparently runs hot, it might be wise if you were running a collection of 4 ohms speakers to set the fan to continuous operation.
The reviewer gave the receiver slightly above average ratings (3.5 out of 5.0) for Measured Power Into 4-ohms. Here's is their measured results into a single 4 ohm load.
We measured CONTINUOUS unclipped power into 4-ohms and showed that the Yamaha could easily drive a single channel from 20Hz to 20kHz at around 185Wrms (20Hz was showing 162wpc). At 8-ohms that measurement fell to around 127wpc (20 Hz was around 113wpc).
With two channels driven, the Yamaha only lost a little power, coming in at around 122wpc with two channels at 8-ohms. These tests were conducted unclipped with distortion no greater than 0.5%. So in reality these are not max power figures but real world, clean continuous power measurements.
Obviously, these tests weren't taken driving all 7 channels, as would be the case when listening to movies. Therefore, some caution should be exercised when driving a complete set of 4 ohms speakers, especially at moderate to high listening levels.
With regard to using three LC80i's for the rear, it is not clear to me how you intend to wire your system. Did you mean that you intend to use two as side surrounds with one single surround back? Or did you intend to try to wire three surround back speakers in addition to the side surrounds?
With a true 7.1 system, capable of delivering stereo signals to two surround back speakers, it would be best to have four surround speakers, two side surrounds and two surround back speakers.
As I mentioned in my previous posting, I have a set of LC265i's for my surround back speakers. They are similar to your speakers only a little larger. I have them mounted inside Polk Audio's optional Performance Enclosures.
The volume of the enclosure is "tuned" to the characteristics of the speakers to provide optimal bass performance. The enclosures also have the added benefit of reducing the sound leaking out of the room through the walls.
On the last page of the LCi Series Cutsheet
, Polk provides information on the ideal wall volume for each of their LCi In-wall speakers. If you don't plan on using the optional enclosures, you can still install firebreaks inside the wall cavity sized to the ideal volume for your speakers.
As to how the LCi's sound, I have been very pleased with them. Many of my guests comment on the clarity of the stereo sound coming from my surround back speakers. With the enclosures they have a low frequency response of close to 40 Hz.