I've got some questions about speakers. I've asked the question on some hi-fi forums, but I suspect that the answers will go over my head.
I've had good success with folks here on the DIS, who know technical stuff I don't know, helping me understand it in laymen's terms.
Here's my situation:

Here's my situation:
So in a nutshell, I'm wondering what y'all think about replacing one or more of the speakers in the Sony HT-SS36I purchased the matching-set Sony HT-SS360 and Sony BDV-S360, HTiB and Blu-ray Disc player. I'm mostly satisfied, but for one thing: The center speaker sounds like AM radio (if you know what I mean).
When playing Blu-ray Discs (connected to the Sony HT-SS360 via HDMI), the sound is great. But when sending my TiVo S3 through the Sony HT-SS360 (whether I make the connection via HDMI or via TOSLINK), the sound is much "tin-ier" than when I send my TiVo S3 through my old Samsung HT-Q40 (via TOSLINK -- the Samsung isn't an HDMI switcher, which was the main reason why I sought to replace it).
These were like-for-like comparisons -- I left the Samsung HT-Q40 in place and just overlayed the Sony HT-SS360 on top of it. I was able to alternatively mute one then the other (using the TOSLINK connection to feed the Samsung HT-Q40 and the HDMI connection to feed the Sony HT-SS360), to do a direct comparison. Swapping the speakers between the two systems (well, swapping five of them -- the sub-woofer couldn't be swapped because it was hard-wired) improved the sound from the Sony HT-SS360 a little bit, which made me suspect the speakers.
I've now hooked up to the Sony HT-SS360 a center speaker from two systems ago (my first surround sound system, a 3.0 system). Anyway, it is a lot better even as compared to the Sony HT-SS360 with the Samsung HT-Q40's center speaker connected to it. I noted that the speakers with the Sony HT-SS360 are 3Ω speakers, and this older speaker is an 8Ω speaker.
This is "good enough". It is at least as good as what I had (and of course, now I have BD and a HDMI switcher, which I needed and didn't have before).
However, now I am intrigued by the idea of getting better sound via better speakers. If this is "good enough", what would be "vastly better" -- or is the up-side with regard to sound limited by the Sony HT-SS360, itself?