Your next extended range driver? Scan Speak Discovery 10F/4424G00 - diyAudio
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Old 7th August 2010, 05:26 AM   #1
ScottG is offline ScottG  United States
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Default Your next extended range driver? Scan Speak Discovery 10F/4424G00

Zaph|Audio

The only real disappointment for a driver of this size is that it's a 4 ohm unit. Everything else is per*T*.

Freq. Response:
http://www.zaphaudio.com/temp/Scan-S...5-30-45-60.gif

CSD:
http://www.zaphaudio.com/temp/Scan-S...424G00-CSD.gif

HD:
http://www.zaphaudio.com/temp/Scan-S...4424G00-HD.gif
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Old 7th August 2010, 06:00 AM   #2
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Looks very impressive for a high powered high quality 3 way project! I'm not sure it quite cuts it for a full range though... could perhaps act as the mid/high in a two way crossed around 300Hz though

this looks like it is the 8 ohm version --> http://www.scan-speak.dk/datasheet/pdf/10f-8424g00.pdf

Tony.
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Old 7th August 2010, 04:47 PM   #3
ScottG is offline ScottG  United States
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Originally Posted by wintermute View Post
..could perhaps act as the mid/high in a two way crossed around 300Hz though


Tony.
That was my thought. It's upper freq. response pretty much "blows away" just about any of the drivers posted here aspiring to "fullrange" status.

I think it would even be viable in a back-loaded horn to about 70 Hz or so.
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Old 7th August 2010, 05:33 PM   #4
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Quote:
Originally Posted by ScottG View Post
It's upper freq. response pretty much "blows away" just about any of the drivers posted here aspiring to "fullrange" status.
Except for the FF85 and almost all the 2nd gen Mark Audio. Probably at least a few others.

Competition is a good thing. They are recognizing this is a valid market which can only be good.

dave
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Old 7th August 2010, 07:45 PM   #5
ScottG is offline ScottG  United States
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Originally Posted by planet10 View Post
Except for the FF85 and almost all the 2nd gen Mark Audio. Probably at least a few others.


dave
I'm including those as well. At least *measurably*..

I also think the 8 ohm & 4 ohm units would do well with 1.5 config.. i.e. baffle step compensation with the 4 ohm driver (connected in series with the 8 ohm unit).
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Old 7th August 2010, 08:44 PM   #6
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That's a surprise -I thought now John was selling his own drivers he'd stopped reviewing other units. Looks to be a nice midrange.

For the above -not necessarily. It depends how & which measurements are taken, with what equipment & processing, what a driver is designed for, and how it is to be used. For there to be any real relevance, the drivers being compared need to be intended for the same purpose, measured in the same way, with the same equipment, and then the equivalent measures for each then employed for the purposes of comparison.

For e.g.; same driver looking slightly less impressive in the nearfield (courtesy of Mark K).
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File Type: png nearfield_FR_comp.png (19.0 KB, 1369 views)
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Old 7th August 2010, 08:48 PM   #7
Defo is offline Defo  Norway
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Quote:
Originally Posted by ScottG View Post
The only real disappointment for a driver of this size is that it's a 4 ohm unit.
There is an 8 ohm version two... 10F/8424G00

This is my measurement of the 8 ohm unit
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Old 7th August 2010, 08:54 PM   #8
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I made a dipole with 3 ScanSpeak drivers. One 8 Ohm in the midlle and 2 4 Ohm at top and bottom. See my MPL thread. I think the treble response is just right because it compensates for the falling response on the side. I cross the speakers some centimeters before my ears. Ted Jordan gave a good explanation of this "Difuse Field" equalisation.
It improves 3 dimensional imaging and widens the sweetspot as a by effect.
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Old 7th August 2010, 08:59 PM   #9
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Here are my on- and off-axis measurements on a baffle ( one unit ).
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Old 7th August 2010, 09:00 PM   #10
Defo is offline Defo  Norway
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Quote:
Originally Posted by planet10 View Post
Except for the FF85 and almost all the 2nd gen Mark Audio. Probably at least a few others.

Competition is a good thing. They are recognizing this is a valid market which can only be good.

dave
As far as I can see, most of the Mark Audio units has +/- 10 db wide banwidth ripples in response... Almost as bad as Lowthers Allthough not quite there yet.

Click the image to open in full size.
Click the image to open in full size.

Last edited by Defo; 7th August 2010 at 09:12 PM.
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