Summary: In short, these speakers are an incredible value. I Craigslisted a pair of these from a moving-sale (best way to get the best deals btw). I only paid $100 for the pair...which came with a crappy 1,000 Watt RCA receiver, queen mattress, and a mountain bike. After hooking these up to my 20 something years old Technics SA-160 receiver, the sound was so good it inspired me to look up specs... lots of specs.
Summary: I bought these speakers because Yamaha has a great reputation in making great musical and sound products. However, these speakers were great dissapointment to me because they did not sound good. The speakers lack transient response resulting in decreased sound accuracy especially on low audible frequencies. Not like sealed enclosures, they lack the punch and deep bass tone response.
Summary: Somewhat of a biased review because I've only used these paired with a subwoofer. I actually bought these over the NS-777's to save money because I knew my lower frequency range would be covered my my subwoofer and A/V receiver's built-in tuning algorithms. Having said that, these speakers are excellent for the price. I wouldn't consider any other floorstanding speakers until the +$800 range.
Excerpt: I replaced some older Bose 301 I was using as my front left and right and, wow. These speakers completed my home theater system and made such a difference. I was not a big fan of the feet so I did not use them and put the speaker directly on the tile floor next to the home theater cabinet. Looks better this way in my opinion.
Pros: Attractive Design, Easy To Set Up, Good Power Output, Great Sound Quality
Summary: I am going to keep this simple. These are the best speakers I have ever owned!!! Especially for the pice! 2 woofers, 1 tweeter and 1 mid range driver on each tower!, I have a top of the line onkyo receiver and These speakers rock the house with loud and clear, crips sound!! One day I realized my subwoofer wasn't even connected. That's when I realizes that I didn't even need the subwoofer with these tower speaker. I Never even reconnected that subwoffer again lol.
Excerpt: Being just a bit smaller than the NS-777 they hold their own in both Home Theater Audio and 2 Channel Analog audio. Match them up with the NS-C444 center channel along with the NS-333 Rear speakers and you have a very decent 5.1 Home Theater system. With the Black Lacquer finish they also look good and more spouse friendly. Match the speakers up with a good 75+ watt receiver and you will not be disappointed with the sound output.
Summary: First off, the speakers are gorgeous. I was blown away by the mirror black surface. Second, they weight 44 pounds a piece! Quality really does scale with weight. It's interesting that the NS-555 is equipped with the same cone sizes as Yamaha's highest end $2000 Soavo models. One 1", one 5", and two 6.5". It must be ideal. The 30Hz - 35kHz is best in class. Without surprise, they hands down beat my Bose car system.
Excerpt: Prior to purchasing the NS-555 speakers I had owned a pair of Dynaudio Contour 1.3 SE monitors, which sold for much more. I sold off most of my high-end in order to attend graduate school. <br /><br />I use the NS-555s in a two channel system with a Yamaha AX-592 integrated amplifier and a Yamaha DVD-S2700 DVD/SACD player. In a word this system is "phenomenal"! The NS-555s are not as good as the Dynaudios but they are probably 80%+ at 1/5th the price.
Pros: Attractive Design, Easy To Set Up, Great Sound Quality