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Old 12th January 2013, 12:18 AM   #11
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Quote:
Originally Posted by speakerdoctor View Post
SS drivers. Check out the "Intimates" mini-monitors at the link below for specific driver models. Also note the simple crossover I was able to use because of the smooth roll offs.

Introducing the "INTIMATES" (high WAF & quality sound)
A bit too expensive for me at the moment, but I like the simple crossover design (i'm using a modified AR-XO currently) and the woofers are happy to be in a sealed box. Maybe one day...
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Old 12th January 2013, 12:19 AM   #12
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Originally Posted by ODougbo View Post
This is a very popular woofer, may be what you are looking for.


The Madisound Speaker Store
As Pete said, they're a bit too peaky.
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Old 12th January 2013, 12:31 AM   #13
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Originally Posted by ScottG View Post
Nope. Just a general statement to fatmarley.

Often when people ask for an "easy" woofer that rolls off smoothly, what they are really asking for is a driver that has a 1st order low-pass nature on-axis so that they don't need to have a low-pass network. Of course, what they often forget is that measurements for those drivers are on an infinite baffle AND that they are often only considering the on-axis response.
I don't mind using a low-pass network. I'd just like it to be as simple as possible.

My current speakers have a dip at the crossover point off-axis and the tweeter slope is a bit shallow, but they sound very good to my ears. I really need to get my **** into gear and try another crossover I modeled to see if a technically better crossover sounds better.
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Old 12th January 2013, 01:06 AM   #14
ScottG is offline ScottG  United States
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Originally Posted by fatmarley View Post
I don't mind using a low-pass network. I'd just like it to be as simple as possible.

My current speakers have a dip at the crossover point off-axis and the tweeter slope is a bit shallow, but they sound very good to my ears. I really need to get my **** into gear and try another crossover I modeled to see if a technically better crossover sounds better.

Consider a waveguide solution for the top-end (..tweeter, not compression driver). That way you should be able to match dispersion better and have a simpler electrical high-pass for the tweeter with much lower excursion and non-linear distortion. (..it also aids in offset for the tweeter for better alignment.) Look to the January 24 & February 5 2010 posting on Zaph's blog (near the bottom of the page):

Zaph|Audio

Combining something similar with the Seas 10" (A26RE) on a wide baffle should be nice.

This speaker utilizes a variant of the A26RE:

http://www.stereophile.com/content/d...96-loudspeaker

You would need a wider baffle howeer (..and of course the waveguide loaded tweeter is insufficient in it's loading on that design). In fact you can see the suck-out horizontally centered on 2 kHz (in Fig. 4):

http://www.stereophile.com/content/d...r-measurements
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Last edited by ScottG; 12th January 2013 at 01:30 AM.
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Old 12th January 2013, 01:14 AM   #15
ScottG is offline ScottG  United States
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Here is another classic:

The Madisound Speaker Store

It also has better dispersion out to 2 kHz then most 8" drivers..

The smaller (less than 8" driver) "Discovery" series from Scan Speak has some pretty smooth drivers (..which can also be seen in Zaph's blog).
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Old 12th January 2013, 01:41 AM   #16
ScottG is offline ScottG  United States
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Here is 6.5" with a smooth roll-off and a bit of acoustic baffle-step compensation built-in:

M165X Woofer

Zaph also has this driver measured in the 6" driver grouping on his main page.
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Last edited by ScottG; 12th January 2013 at 01:46 AM.
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Old 12th January 2013, 08:58 AM   #17
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Originally Posted by ScottG View Post
Consider a waveguide solution for the top-end (..tweeter, not compression driver). That way you should be able to match dispersion better and have a simpler electrical high-pass for the tweeter with much lower excursion and non-linear distortion. (..it also aids in offset for the tweeter for better alignment.) Look to the January 24 & February 5 2010 posting on Zaph's blog (near the bottom of the page):
I actually use a waveguide in my current speakers (Monacor DT300).

Thanks for all the driver suggestions Scott. I quite like the look of the M165X.
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Old 12th January 2013, 02:52 PM   #18
gornir is offline gornir  Sweden
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Originally Posted by fatmarley View Post
When choosing drivers i'd rather look at ones with a smooth roll off to make crossover design easier. Has anyone got any recommendations for woofers and tweeters that have a smooth roll off?

The 8" Vifa M21WG-09-08 rolls off pretty smoothly. The one used in the Gale gold monitor rolls off smoothly and I think it may be the Peerless SKO130 (new old stock can be found on ebay). The Seas A26RE4 also has a smooth roll off.
Can anyone think of any more?
Hi,

If you don't mind a smaller 5.5" mid-woofer that also have a nice bass extension, here's the smoothest mid-woofer I've measured.

ScanSpeak 15W/4531G00 Measurements!

/Göran
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Old 12th January 2013, 03:27 PM   #19
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Originally Posted by gornir View Post
Hi,

If you don't mind a smaller 5.5" mid-woofer that also have a nice bass extension, here's the smoothest mid-woofer I've measured.

ScanSpeak 15W/4531G00 Measurements!

/Göran
Have you measured the 15W/8530K 01? I did close mic'd (red line). See below.
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File Type: png scanspeak15W8530K01closemicedred.png (54.2 KB, 109 views)
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Old 12th January 2013, 03:54 PM   #20
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Originally Posted by speakerdoctor View Post
Have you measured the 15W/8530K 01? I did close mic'd (red line). See below.
Posted measurement shows artifact in pre peak response in IR results consistent with feedback or multiple time bases (two sound cards with different clock speeds).

Peaking around 70Hz indicates we aren't looking at natural response of driver.
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