LC265i benchmarks

Kurtster

Has anyone found a place where I might be able to see how flat the LC265i is across the frequency spectrum?

I am debating whether or not to replace my SDA-1Cs, FX500i surrounds and CS1000p center with a new set of 5 LC265i in-walls with enclosure case, or whether to pick up a set of Blue Sky THX PM3 certified studio monitors.

the Blue Skys are darn near flat across the spectrum. If the Polks are pretty close, I'd rather have them to stick with the brand, and conceal the speakers more easily.

Anyone dones this kind of testing and posted the results online?

Zen Dragon

Your best bet is to do some extensive google searching. The SDA-1C's use a stock tweeter that has a known resonance at about 13KHz which produces a spike. I am not sure how much of this spike makes it ultimately to the listener as Polk does appear to have used a notch filter in the upper tweeter circuit. Some members have upgraded the tweeters to the replacement RD0194-A's with a flatter frequency response and claimed great results.
Other than that I am not familiar with the speaker you are comparing the SDA-1C to.

Kurtster

Here is the measurement data on the Blue Sky studio monitors.
http://www.abluesky.com/m/p/bs50021a.pdf

This is the kind of info I'm looking for on the LC265i

I don't expect the information to be too much different, but if there are some really big spikes, or other anomolies, it would be good to know if I'll need to EQ (and if so by how much) for flatter response.

dorokusai

polkcs@polkaudio.com

Larry Chanin, a Polkie, may have some more information as well. He is using a couple of the same speakers in his HT. Do a search for his name....

Larry Chanin

Kurtster wrote:

Here is the measurement data on the Blue Sky studio monitors.
http://www.abluesky.com/m/p/bs50021a.pdf

This is the kind of info I'm looking for on the LC265i

I don't expect the information to be too much different, but if there are some really big spikes, or other anomolies, it would be good to know if I'll need to EQ (and if so by how much) for flatter response.

Hi Kurt,

I hope the information I provided via email was of some assistance.

However, I don't know how to interpret the Blue Sky response curves. They all show equalized responses. Does the monitor come with built-in equalization? If not, I'm not sure how you would go about comparing response curves between different speakers.

The LC265i's are very flat, but probably not as flat as those equalized curves.
As I mentioned in my email, in real life, positioned near the side walls as your application seems to require, the Polks might be flatter when using the Distance Toggle Switch.

I'll post the LC265i response, perhaps some of the other Club members might care to comment.

Larry

PS. The scale on the attachment is incorrect, the 1000 Hz label is really 10,000 hz.