Adire Koda Tweeter

[npdang]

Frequency response measured unbaffled. Spl looks to be about 92dbwm. I can't explain that weird suckout at 8khz, except to say that it occurs in almost all the measurements. Pretty good off-axis response though at 60 degrees. You'd definitely want this to be mounted extremely off-axis for the smoothest response, although you do lose quite a bit of sensitivity.

http://diymobileaudio.com/pics/kodatweet/fr.JPG

Looks squeaky clean.

http://diymobileaudio.com/pics/kodatweet/waterfall.JPG

Overall excellent decay times, except at 8khz where it looks pretty bad.

3khz.
http://diymobileaudio.com/pics/kodatweet/decay3000.JPG
5khz.
http://diymobileaudio.com/pics/kodatweet/decay5000.JPG
8khz.
http://diymobileaudio.com/pics/kodatweet/decay8000.JPG
12khz.
http://diymobileaudio.com/pics/kodatweet/decay12000.JPG
15khz.
http://diymobileaudio.com/pics/kodatweet/decay15000.JPG

Distortion measurements all taken at 96db @1m. Pretty loud.

Definitely don't want to cross at 2khz, due to the high distortion.

http://diymobileaudio.com/pics/kodatweet/dis2000.JPG

3khz is a great place to cross over. Very low distortion above this point, although 3rd order products could be a bit lower.

http://diymobileaudio.com/pics/kodatweet/dis3000.JPG
http://diymobileaudio.com/pics/kodatweet/dis5000.JPG

Qts is a bit high, which explains the bump around 1.2khz.

http://diymobileaudio.com/pics/kodatweet/impedance.JPG

Pros:

1. Good extreme off-axis performance
2. Generally good distortion and fast decay above 3khz

Negatives:

1. Very rough on-axis response and strange severe suckout at 8khz
2. Not suitable for use below 3khz

[tokyofist]

i really didn't like these tweeters.....







but, i had them mounted pretty much on axis. i'd try them again, but a terminal snapped off one of them. oh yeah, and i got some dayton rs tweets, and you'd have to pry them out of my cold dead hands to get me to give em up :D