
NS-SP1800 Multimedia Home Theater Speaker System has Advanced Yamaha Active Servo Technology (Advanced YST), this is a unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion. Advanced YST helps to ensure the highest levels of sound pressure and overall performance.

Q: Do these speakers connect via plugs or bare wire?
A: they connect with bare wire
A: The subwoofer accepts both hi-level (speaker wire) and low-level (RCA cable from receiver SUB output), so either can be used.
Q: Wall Mount??
A: Yes, the sattelites and center can be mounted via keyhole mounts or 60mm screw-in mounts.
Q: How do these speakers connect to the Tv?
A: You would need to buy a receiver! Yamaha has several of them on the market. Attach the speakers to the receiver and use a HDMI cable to your TV.
Q: What is the impedance on these speakers?
A: The impedence is rated at 6 ohms.
A: Do not let the small form factor fool you- I played Led Zepplin celebration day through these and the sound quality was really nice!!! I also use them for 4k movies and pc games. For the price, these speakers are worth it.
Q: Can humans hear over 20kHz?
A: Humans can not hear over 20khz however when selecting a speaker and the specs say 22khz or even 40khz that is important. Frequency response tapers off toward the bottom and top of the claimed frequency range. It starts low and slopes upward to a plateau and then up high it slopes back down from a certain point to the top number claimed. If the speaker responds to 20khz, it actually starts to drop off before that. Sometimes well before that. Same for low end. It they claim 60 hz on the low end, you actually get more like 80hz because of the low end tapering off the lower the frequency. If you want it to reproduce that 17-20khz youll want to shoot for a 24khz+ response so that the speaker is sounding optimally at 17-20khz before the slope. I would go for a speaker that responds from 50-24000 hz before I'd go for a 80-20000 hz speaker.
A: I believe your receiver is to small these speakers require 45 watts minimum I experienced the same problem with my 300 watt receiver I have to turn it up 240 to get good sound I am currently researching a larger receiver. these are the best sounding surround speakers I've ever owned my last set of yamaha's lasted longer than than 8 years. I hope to replace my receiver soon to enjoy all the available wattage of this system