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Old 29th September 2014, 06:40 PM   #1
rutcho is offline rutcho  Bulgaria
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Default Rutcho's Fullrange Measurements Database

Dear friends,
During the past decade I collected a lot of loudspeaker drivers, some of them for my particular projects, some just to feed my curiosity.
I made duly measurements for all of them which I decided to share in a dedicated web page as well as some of my loudspeaker system projects.
I am starting with eight-inch fullrange drivers, some of them measured in a specially constructed "Universal" Horn.
I hope this information will be useful for many audio DIY-ers.
Here it is:

Loudspeaker Raw Driver Measurements

I've started with the followed drivers:
Coral Beta 8
Fostex FE-208 Sigma
Fostex FP-203
Lorenz S-888
Pioneer PIM-8L
Tang Band W8-1772
More measurements will come soon...
Any comments and suggestions are welcome!
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Old 29th September 2014, 08:26 PM   #2
BYRTT is offline BYRTT  Denmark
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... Rutcho very beautiful and interesting website thanks for sharing here.

Last edited by BYRTT; 29th September 2014 at 08:32 PM.
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Old 29th September 2014, 08:35 PM   #3
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Thanx. Nice to see burst decay waterfalls... much more useful than the usual.

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Old 1st October 2014, 01:11 AM   #4
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Thanks!
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Old 1st October 2014, 04:44 AM   #5
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Great job - very interesting!
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Old 1st October 2014, 06:11 AM   #6
Elias is offline Elias  Finland
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Quote:
Originally Posted by rutcho View Post
Dear friends,
During the past decade I collected a lot of loudspeaker drivers, some of them for my particular projects, some just to feed my curiosity.
I made duly measurements for all of them which I decided to share in a dedicated web page as well as some of my loudspeaker system projects.
I am starting with eight-inch fullrange drivers, some of them measured in a specially constructed "Universal" Horn.
I hope this information will be useful for many audio DIY-ers.
Here it is:

Loudspeaker Raw Driver Measurements

I've started with the followed drivers:
Coral Beta 8
Fostex FE-208 Sigma
Fostex FP-203
Lorenz S-888
Pioneer PIM-8L
Tang Band W8-1772
More measurements will come soon...
Any comments and suggestions are welcome!

WOW, look at Lorenz S-888 nice response ! Why there are no 8" full range driver nice as that available today ?

Click the image to open in full size.


Opposite, Coral Beta 8 looks terrible, yuck !

Click the image to open in full size.


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Old 1st October 2014, 02:05 PM   #7
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Just a general observation: FR plots of wide-range drivers almost always look better at 10-15* of-axis. Wide-range drivers are almost always used toed in/out. Why the obsession of looking at the warts in the on-axis FR plot? Even you Coral plot is much better off-axis.

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Old 1st October 2014, 05:22 PM   #8
BYRTT is offline BYRTT  Denmark
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Bob Brines as general observation good argument warts accepted, though with technical eyes they ain't pretty.

Looking particular these two plots it looks like tweaking red blu or green axis on Lorenz S-888 that the more uniformity will do that other two axis will benefit too a certain level, maybe this is some of what Elias like.

At Coral Beta 8 red blue and green axis looks more like three different drivers measured and that tweaking response of one of the axis never will benefit the two others. If having visitors in listening room some will have their seat in the red axis.
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Old 2nd October 2014, 05:58 AM   #9
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I enjoy full rangers warts and all. I used to get hung up on FR charts but not anymore. I just find the drivers I like, toe them in how I like and enjoy. Some are bright others dull but IMO they do more right with the music than multi way systems. I think it depends on how and what you listen for.
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Old 3rd October 2014, 09:02 PM   #10
rutcho is offline rutcho  Bulgaria
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Quote:
Originally Posted by Godzilla View Post
I enjoy full rangers warts and all.
Although I publish crossover networks for some drives I do prefer the unfiltered sound of the full ranges too.

Here are some updates:

University Diffusicone Eight

Tang Band W8-1808
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