New drivers...

Wolf · November 2017

Mad has some new drivers...

The ceramic SB woofers are in.

The new Audax 5.25" dedicated mid looks really nice.

D1PP1N · November 2017

You can post links here btw!

Wolf · November 2017

I know- just didn't have time to knab it...

https://www.madisoundspeakerstore.com/new-products/

dcibel · November 2017

LOL, you'd think everyone would have this in their bookmarks:

https://www.madisoundspeakerstore.com/new-products/

The Ceramic/Aluminum drivers look nice, can't complain about the response, and I like the matte white look of the cones. I also like that the models are a 5" and 8", not another boring 6.5"

. Paired with a Ceramic TL tweeter that could be a very nice "white" 3-way build.

The Audax looks interesting too, the one peice cone/surround is something unique. It's like a cross between a accordian and a rolled edge. Should make for a very nice midrange driver. And here I thought Audax was pulling out of the DIY market.

Wolf · November 2017

Audax pulled out years ago, but AAC is still producing a few of the older drivers as they wish.

It looks like the Audax is an older Polydax model from the spec-sheet.

...and yes- I thought everyone had Mad in their favorites folder. It was 3 clicks for me!

jhollander · November 2017

I wonder what the break up sounds like. A 5 inch with an Fs of 35 and being able to cross at 3-4 K is impressive. The 8 inch is impressive as well.

Wolf · November 2017

I was thinking the same thing!

PWRRYD · November 2017

Oh my! I like what I see with those SB15CAC30's! I think I just might have found the drivers to pair with my Dynaudio D28/2 tweeters.

Wolf · November 2017

Yes- They are impressive!

jr@mac · November 2017

I would like to see them in black, but they look great otherwise.

Wolf · November 2017

Being that it's an oxidation layer on Al, or AlO2, can you actually have a black ceramic?

I honestly don't know if that's even possible.

PaulEbert · November 2017

It seems to me that the SB29SDAC has a very impressive FR, especially off-axis and for the price. I wonder if they will come out with a ceramic tweeter.

I will be very interested in the distortion of the ceramic drivers. If they're typical of SB, they should be excellent. I'm looking for drivers for my next build. I've been considering Satori, Motus and a few others. These might be a good, less expensive option.

PWRRYD · November 2017

I should have a pair fairly soon and can measure their distortion on my IB setup.

ani_101 · November 2017

are you getting the 5" or the 8". Both look good, but more interested i the 5" to see if we can get a really potent small 2 way

PWRRYD · November 2017

The 5"

PWRRYD · November 2017

Drivers just ordered... should be here tomorrow or Thursday.

PWRRYD · November 2017

Whoo-hoo! My new SB 5" ceramic drivers are here! I just opened the boxes and visually inspected them. VERY high quality thus far. More to follow (some break in and T/S measurements).

cssaudio1 · November 2017

The mfg frequency response graph looks crazy flat in the passband and the T/S specs look very workable. Looking forward to your assessment.

Dan

jhollander · November 2017

opening boxes, sounds like 12 days of christmas or Hanukkah starting early

stephenk9 · November 2017

Wolf said:

Being that it's an oxidation layer on Al, or AlO2, can you actually have a black ceramic?
I honestly don't know if that's even possible.

They do sell black ceramic knives.

jholtz · November 2017

PWRRYD said:

Whoo-hoo! My new SB 5" ceramic drivers are here! I just opened the boxes and visually inspected them. VERY high quality thus far. More to follow (some break in and T/S measurements).

Hi Craig,

This is a very interesting looking driver. Are you set up for FR and distortion measurements?

Jim

jr@mac · November 2017

https://www.kohls.com/product/prd-2916247/cuisinart-advantage-12-pc-metallic-cutlery-set.jsp?ci_mcc=ci&utm_campaign=FOOD PREP&utm_medium=CSE&utm_source=bing&CID=shopping20&utm_campaignid=73065140&gclid=CNCM2c7j5tcCFauoZQodPcMNQw&gclsrc=ds&dclid=CNr8587j5tcCFQl4AQodVDgF2A

Sure can do different colors, I bet. Just easier and cheaper to not do so, I imagine. In any event, Klipsch has gold colored cones they advertised as Cerametallic, and Infinity has had several different shades of gray on their MMD/CMMD cones.

PWRRYD · November 2017

jholtz said:

PWRRYD said:

Whoo-hoo! My new SB 5" ceramic drivers are here! I just opened the boxes and visually inspected them. VERY high quality thus far. More to follow (some break in and T/S measurements).

Hi Craig,

This is a very interesting looking driver. Are you set up for FR and distortion measurements?

Jim

Yes, I use OmniMic. I also have a 48" x 48" infinite baffle with interchangable plates for testing different sized drivers.

jholtz · November 2017

Cool! I'm looking forward to seeing your measurements!

Thanks in advance for your work!

Jim

Wolf · November 2017

stephenk9 said:

They do sell black ceramic knives.

But is the black finish ceramic?

More ceramic tweeters:

https://www.parts-express.com/tang-band-25-1719s-1-ceramic-dome-tweeter--264-865

https://meniscusaudio.com/product/accuton-c25-6-012/

http://www.transducerlab.com/index.php?pag=pro&p=l&c=Oxide+Dome+Tweeters

Wolf · November 2017

jr@mac said:

https://www.kohls.com/product/prd-2916247/cuisinart-advantage-12-pc-metallic-cutlery-set.jsp?ci_mcc=ci&utm_campaign=FOOD PREP&utm_medium=CSE&utm_source=bing&CID=shopping20&utm_campaignid=73065140&gclid=CNCM2c7j5tcCFauoZQodPcMNQw&gclsrc=ds&dclid=CNr8587j5tcCFQl4AQodVDgF2A

Sure can do different colors, I bet. Just easier and cheaper to not do so, I imagine. In any event, Klipsch has gold colored cones they advertised as Cerametallic, and Infinity has had several different shades of gray on their MMD/CMMD cones.

Just saw this...

IIRC, the black cones Accuton were using were coated with a polymer or something, and the surface was not the ceramic layer. Arial Acoustics? I don't remember the company that had them.

I always wondered how much ceramic their cerametallic material was.

PWRRYD · November 2017

Man those Transducer Lab ceramics would be cool.

Ed_Perkins · November 2017

I think that one is an aluminum dome. Here's one coming; not ceramic, but Beryllium:

http://www.sbacoustics.com/index.php/coming-soon/sb29bac-c000-4/

PWRRYD · November 2017

Hi guys, I just finished measuring the T/S parameters with DATS after a mild break in (flexed by hand followed by 60 Hz free air at 6.3 volts for a couple minutes). I started with 10.1 grams added mass but it was too low. So I ended up measuring Vas with 3 nickels (15.1 gram) stuck to the dust cap. Here is the data (Manufacturer, Driver A, Driver

Fs    35.5     39.03     37.68
Re    5.7      5.662   5.693
Qms 4.77    4.389     4.432
Qes .42      .5184     .4856
Vas   17.9    11.29      11.58
Le     .14      .1282     .1339

Pretty darn close compared to most drivers I have measured. The Fs and Qes is higher but the Vas is lower. I bet when box modeling the differences are a wash. The impedance plot was nice and smooth with only a tiny 1/2 ohm blip at 10 KHz (way outside the pass band). The impedance rise was extremely low due to the ~0.13 mH inductance.

I will measure the FR and distortion this weekend.

dcibel · December 2017

I'd be interested to see how the SB 5" compares to the ZA14 through the midrange.

PWRRYD · December 2017

Hi guys. I was able to mount and measure these new SB15CAC30-8 woofers on my 48" x 48" infinite baffle today. Far field is 25" mic distance. Near field is ~1/4" from dust cap. 1/48th octave, 5 ms gate.

Far field frequency response:

Image: http://diy.midwestaudio.club/uploads/editor/c1/39fjyhm3xxtv.jpg

Far field distortion:

Image: http://diy.midwestaudio.club/uploads/editor/f4/xwnwf5zfxwos.jpg

Near field frequency response:

Image: http://diy.midwestaudio.club/uploads/editor/dn/i0vegzxgrl1g.jpg

Near field distortion:

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