Crystal Clear Voices even with 7.1 background sounds!
7 March 2015
Summary: Excellent center channel speaker and matched my non Polk Audio 12 year old tower speakers perfectly, a coincidence I suspect. My old center channel speaker had muddled voices making it difficult to understand spoken words, especially when there is 7.1 background sound. This Polk Audio CSi A4 has crystal clear voices, now I can hear even the whispers of voices with 7.1 background sounds going on, really nice! I'm happy.
David Riley "Engineer / Pedantic Word Dork", Amazon
19 February 2015
Summary: Produces excellent sound in our relatively low-key system. I wish it had better options for wall mounting (my main reason for docking it a star), but it looks rather nice on our entertainment center. The sound is great for movies (my receiver doesn't use the center channel for stereo music, but as soon as I get some SACDs to play on my early-generation PS3, I'll give that a try), especially once run through the receiver's calibration program.
Summary: Paired this with 4 Polk MC 80 in-ceiling speakers and a PSW505 subwoofer, and the results were wonderful. After about 6 months, the subwoofer stopped working. I called Polk, and they sent me a replacement amplifier for it, no pushback given, no questions asked. It was truly great customer service.
Couldn't be happier with the sound. Also, stunning looks.
9 November 2014
Summary: I've got it paired with a Polk CSI A4 center, 2 RTI A5 towers, 2 FXI A4 surrounds, & 2 Paradigm | SIG-1.5R-30 v.3's in the rear ceiling (previous home owner left them installed), all powered by a Marantz NR1605, couldn't be happier with the sound, in a room 14x16 or so. Also, a Polk Audio PSW505 which I bought from Polk's direct refurbished sales on eBay.