Scan-Speak 4 inch wideband

Defo · 27th May 2010, 09:47 PM

Anyone have any experience with this Scan-Speak "wideband" driver? Seems very linear, unlike most other full range's.

Would maybe work in a horn/waveguide?

Scottmoose · 09:59 PM

For 'seems very linear', read 'heavily smoothed FR graph.'

If something looks too good to be true, it is. Which isn't to suggest it's a bad driver, just that it's extremely unlikely to be any 'better' (whatever that means) in this particular respect than any other.

Anyway, yes, it will work in a horn or waveguide. That's no big deal; pretty much any driver will work in a horn or waveguide, assuming it's designed properly.

Defo · 27th May 2010, 10:40 PM

Doesnt look that smoothed too me, with all those wrinkles. If there would be any serious peaks, it would show, even on a more smoothed graph

Only downside as I see it, is a bit low sensitivity.

Joachim Gerhard · 27th May 2010, 10:59 PM

Read my MPL thread. I have the Scan Speak in a simple open baffle with subwoofer and it works very well.

Defo · 27th May 2010, 11:32 PM

Quote:

Originally Posted by Joachim Gerhard

Read my MPL thread. I have the Scan Speak in a simple open baffle with subwoofer and it works very well.

Thats just great! With measurements and everything

Seems to extend higher then the manufacturer graph too. I compared the 4 and 8 ohm versions and the latter seems to have a more extended high end, and quite different ts-parameters. Why is that?

Joachim Gerhard · 27th May 2010, 11:56 PM

When you change the voicecoil, everything changes. The higher impedance voicecoil may see a comparatively lower inductance and that may be the difference in extention.
A 4 Ohm voicecoil has also higher mass usually but may fill the gap better. I have so far only experience with the 4 Ohm version and treble extension is just fine. More treble could not hurt and you can adjust the balance by angling the speakers more in, so that they cross before your ears. That also helps to smouth the whole trend. I use no crossover and tonal balnce is just right. So far the best commercial little wideband i heard and measured.

ttan98 · 28th May 2010, 01:25 AM

Most discussion here:

Vance Dickason tested new SS 10F - Techtalk at Parts-Express.com

Try post #9, on the evaluation of this driver.

Scottmoose · 28th May 2010, 10:28 AM

Quote:

Doesnt look that smoothed too me, with all those wrinkles. If there would be any serious peaks, it would show, even on a more smoothed graph.

I wouldn't bet on it. This is what raw data looks like:

Most manufacturers are economical with the truth with their published FR plots. Smoothing can be anything from minimal to 1/2 octave or more (and they very rarely tell you how much). Another slightly more subtle favourite, is to expand the dynamic range on the chart to a huge value. Then they can play around with the resolution of the data sheet & size of the image... lots of lovely ways there. Some are better than others, but ROT is don't take them at face value; about all they're good for is assessing general trends.

Defo · 28th May 2010, 12:30 PM

Quote:

Originally Posted by ttan98

Most discussion here:

Vance Dickason tested new SS 10F - Techtalk at Parts-Express.com

Try post #9, on the evaluation of this driver.

Thanks for the measurements. I would love to compare them to some of the Fostex drivers. Even tho the SS is way more linear...

Quote:

Originally Posted by Scottmoose

I wouldn't bet on it. This is what raw data looks like:

Most manufacturers are economical with the truth with their published FR plots. Smoothing can be anything from minimal to 1/2 octave or more (and they very rarely tell you how much). Another slightly more subtle favourite, is to expand the dynamic range on the chart to a huge value. Then they can play around with the resolution of the data sheet & size of the image... lots of lovely ways there. Some are better than others, but ROT is don't take them at face value; about all they're good for is assessing general trends.

I will take a smoothed graph over that graph anyday. One isnt able to hear all those tiny peaks and dips anyway. Tonal balance is what matters, at least to me

Joachim Gerhard · 28th May 2010, 12:43 PM

I am surprised about the loss in high frequency response. My sample measures much better in this regard.

27th May 2010, 09:47 PM	#1
Defo diyAudio Member Join Date: Nov 2008	Scan-Speak 4 inch wideband Anyone have any experience with this Scan-Speak "wideband" driver? Seems very linear, unlike most other full range's. Would maybe work in a horn/waveguide?

27th May 2010, 09:56 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	For 'seems very linear', read 'heavily smoothed FR graph.' If something looks too good to be true, it is. Which isn't to suggest it's a bad driver, just that it's extremely unlikely to be any 'better' (whatever that means) in this particular respect than any other. Anyway, yes, it will work in a horn or waveguide. That's no big deal; pretty much any driver will work in a horn or waveguide, assuming it's designed properly. Last edited by Scottmoose; 27th May 2010 at 09:59 PM.

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27th May 2010, 10:40 PM	#3
Defo diyAudio Member Join Date: Nov 2008	Doesnt look that smoothed too me, with all those wrinkles. If there would be any serious peaks, it would show, even on a more smoothed graph Only downside as I see it, is a bit low sensitivity.

27th May 2010, 10:59 PM	#4
Joachim Gerhard diyAudio Member Join Date: Mar 2009	Read my MPL thread. I have the Scan Speak in a simple open baffle with subwoofer and it works very well.

27th May 2010, 11:56 PM	#6
Joachim Gerhard diyAudio Member Join Date: Mar 2009	When you change the voicecoil, everything changes. The higher impedance voicecoil may see a comparatively lower inductance and that may be the difference in extention. A 4 Ohm voicecoil has also higher mass usually but may fill the gap better. I have so far only experience with the 4 Ohm version and treble extension is just fine. More treble could not hurt and you can adjust the balance by angling the speakers more in, so that they cross before your ears. That also helps to smouth the whole trend. I use no crossover and tonal balnce is just right. So far the best commercial little wideband i heard and measured.

28th May 2010, 01:25 AM	#7
ttan98 diyAudio Member Join Date: Apr 2006 Location: Melb	Most discussion here: Vance Dickason tested new SS 10F - Techtalk at Parts-Express.com Try post #9, on the evaluation of this driver.

28th May 2010, 12:43 PM	#10
Joachim Gerhard diyAudio Member Join Date: Mar 2009	I am surprised about the loss in high frequency response. My sample measures much better in this regard.

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