Updated:
11-Jan-03
Description of the main measurements....
All measurements were initially done in my livingroom.
Although the Hobby Box software is almost not influenced by this (as long as you
take the FFT interval small enough to let the echoes not fall in the window...) I wanted
to use a more or less non-reflecting room to do the last measurements. I found this
room outside in my Garden !!! On the pictures you see what I mean.....
Below you see the final result of the ETAMSAS. The RED curve was done in my "anti-echoic-chamber", the black one in the living room. With this result I was more than happy and the nice music produced was confirming this....
The Waterfall diagram shows that the ETAMSAS is a very fast loudspeaker with huge control. This is responsible for the very neutral character of this Design
This Graph shows how the total curve is being combined from the 2 individual loudspeakers. Although the high frequency response seems a bit wobbly, there is no negative effect at all to be heard. And that is the most important isn't it?
The step response from the complete system. First comes the VERY fast response from the AIR-Motion transformer, followed directly by the ETON units.
Finally the impedance curve, which will be of NO problem for what ever kind of amplifier........
Happy Listening and Building !!!!
Doede Douma
IMPORTANT: The information provided on this page is intended as guide for DIY activities and therefore free to copy and or publish. If any one wishes to use any of the information from my WEB site, please make sure to refer and footnote to my URL Link as source! Doede Douma