Yamaha NS-635 speakers

[Juha]

I am listening to a pair of Yamaha NS-635 speakers from about 1978.
These have been called the big brother of the famous NS-10 studio monitors.

NS-635 sports the NS-10 tweeter. Woofer is larger than NS-10 and made by bending one sheet of special paper.
You can see the spot where paper folds on my picture.
The NS-635 woofer is with Alnico magnet.

Why is this interesting?
NS-10 is the famous common denominator for music production.
Countless albums have been mixed or at least tested with the NS-10.

NS-10 is too expensive, because it has been out of production for a long time.

NS-635 has the similar forward mid-sound to the NS-10 revealing good and bad qualities of the music.
So it is interesting to listen to "how these mixes are supposed to sound" at the source.

http://hoone.com/NS635-2.jpg

http://hoone.com/NS635-1.jpg

http://hoone.com/NS635-3.jpg

[Audio Advent]

I've a pair of these too... though I've never got around to even testing that they work. I bought them thinking they were the same as the NS10 (that's the 615) but discovered they were larger.

All about the time domain response of that woofer apparently, not the paper used particularly but that it is a rolled cone.

Here's a good analysis of why they are popular (were popular?): http://www.soundonsound.com/sos/sep08/articles/yamahans10.htm