Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

SB Acoustics SB17NAC35-4 measurements!
SB Acoustics SB17NAC35-4 measurements!
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 21st August 2016, 04:02 PM   #1
gornir is offline gornir  Sweden
diyAudio Member
 
gornir's Avatar
 
Join Date: Sep 2007
Location: Sweden
SB Acoustics SB17NAC35-4 measurements!
Default SB Acoustics SB17NAC35-4 measurements!

Hi everyone,

I just want to share some of my measurements of the SB17NAC35-4 mid-woofer.

If you searching for a great performing hard cone mid-woofer, the SB17NAC35-4 is an excellent option.

Thanks to the cone geometry and shape, it has very good control of the cone break-up and it's a very low distorting driver.

It will be great fun working with this mid-woofer!

For details see: SB Acoustics SB17NAC35-4 Measurements!

/Göran
Attached Images
File Type: jpg SB17NAC35-4_7.JPG (59.3 KB, 1971 views)
File Type: jpg SB17NAC35-4_8.JPG (60.5 KB, 1943 views)
File Type: jpg SB17NAC35-4_9.JPG (62.3 KB, 1928 views)
File Type: jpg SB17NAC35-4_10.JPG (65.0 KB, 1933 views)
File Type: jpg SB17NAC35-4_1.JPG (65.3 KB, 1903 views)
File Type: jpg SB17NAC35-4_2.JPG (64.5 KB, 317 views)
File Type: jpg SB17NAC35-4_3.JPG (60.7 KB, 358 views)
__________________
Author of the "AudioExcite Loudspeaker Design" website & Technical Consultant for HULGICHAUDIO
http://www.audioexcite.com http://www.hulgichaudio.com.au/
  Reply With Quote
Old 21st August 2016, 04:27 PM   #2
5th element is offline 5th element  United Kingdom
diyAudio Member
 
5th element's Avatar
 
Join Date: Oct 2002
Location: England
Wow. SB have solved the distortion amplification due to cone resonances in metal cones with their ribbed structure. The SB65WBAC also showed this but a sample of one wasn't enough to know if their bigger drivers also showed this. Now I really want a Satori version of this!
__________________
What the hell are you screamin' for? Every five minutes there's a bomb or somethin'! I'm leavin! bzzzz! Now with website! www.5een.co.uk under construction.
  Reply With Quote
Old 21st August 2016, 04:40 PM   #3
gornir is offline gornir  Sweden
diyAudio Member
 
gornir's Avatar
 
Join Date: Sep 2007
Location: Sweden
SB Acoustics SB17NAC35-4 measurements!
Quote:
Originally Posted by 5th element View Post
Wow. SB have solved the distortion amplification due to cone resonances in metal cones with their ribbed structure. The SB65WBAC also showed this but a sample of one wasn't enough to know if their bigger drivers also showed this. Now I really want a Satori version of this!
Yes, I was also suprised how well these slits in the cone actually works.

I intended to use them as woofers in a three-way, but given the measurement results I will also try them as mid-woofers in a two-way configuration.

Regards

/Göran
__________________
Author of the "AudioExcite Loudspeaker Design" website & Technical Consultant for HULGICHAUDIO
http://www.audioexcite.com http://www.hulgichaudio.com.au/
  Reply With Quote
Old 21st August 2016, 06:34 PM   #4
gornir is offline gornir  Sweden
diyAudio Member
 
gornir's Avatar
 
Join Date: Sep 2007
Location: Sweden
SB Acoustics SB17NAC35-4 measurements!
I don't know if its true, but if you trust the official measurement specifications the cone break-up seems less good on the 8 ohm version of the SB17NAC35 driver.

See attached pictures:

Picture1 = My measurements of the SB17NAC35-4 driver.
Picture2 = SB Acoustics measurements of the SB17NAC35-4 driver.
Picture3 = SB Acoustics measurements of the SB17NAC35-8 driver.

Blue = On-axis
Green = 30deg off-axis
Red = 60deg off-axis

The main cone break-up seems to appear at 7.5kHz instead of 10.2kHz for the 4 Ohm version. In fact a cone break-up at 10.2kHz is amazing for a 6" hard cone mid-woofer.

/Regards

/Göran
Attached Images
File Type: jpg Picture 1 -- 6in SB17NAC35-4 AE.jpg (154.2 KB, 582 views)
File Type: jpg Picture 2 -- 6in-SB17NAC35-4.jpg (72.9 KB, 543 views)
File Type: jpg Picture 3 -- 6in SB17NAC35-8.jpg (154.8 KB, 1186 views)
__________________
Author of the "AudioExcite Loudspeaker Design" website & Technical Consultant for HULGICHAUDIO
http://www.audioexcite.com http://www.hulgichaudio.com.au/
  Reply With Quote
Old 21st August 2016, 10:05 PM   #5
eriksquires is offline eriksquires  United States
diyAudio Member
 
eriksquires's Avatar
 
Join Date: May 2013
Not to look a gift horse in the mouth, but are there compression measurements too?

Best,

Erik
__________________
All of my successes and failures can be explained by my attempts at getting a girlfriend. All of them.
  Reply With Quote
Old 22nd August 2016, 06:52 PM   #6
gornir is offline gornir  Sweden
diyAudio Member
 
gornir's Avatar
 
Join Date: Sep 2007
Location: Sweden
SB Acoustics SB17NAC35-4 measurements!
Quote:
Originally Posted by eriksquires View Post
Not to look a gift horse in the mouth, but are there compression measurements too?

Best,

Erik
Sorry, No!

Regards

/G
__________________
Author of the "AudioExcite Loudspeaker Design" website & Technical Consultant for HULGICHAUDIO
http://www.audioexcite.com http://www.hulgichaudio.com.au/
  Reply With Quote
Old 23rd August 2016, 12:11 PM   #7
Bill poster is offline Bill poster  Thailand
diyAudio Member
 
Bill poster's Avatar
 
Join Date: Jun 2008
Location: Bangkok/London
That's something I wasn't expecting, great 30degree off axis response to 4khz. Cd theoretically use with a ribbon tweet such as the viawave.
It'd be nice if they wd offer it in black, now that the OEM supply stopped (revel seem to be using a different driver)
  Reply With Quote
Old 23rd August 2016, 02:31 PM   #8
Bill poster is offline Bill poster  Thailand
diyAudio Member
 
Bill poster's Avatar
 
Join Date: Jun 2008
Location: Bangkok/London
A Troels build using this driver SBA 61-NAC - Jantzen-audio.com
  Reply With Quote
Old 24th August 2016, 02:06 AM   #9
454Casull is online now 454Casull  Canada
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
Wonder how loud it can go with a 60 Hz 4th- order acoustic high pass...
  Reply With Quote
Old 24th August 2016, 02:43 PM   #10
454Casull is online now 454Casull  Canada
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
In your measurements there's a substantial dip at 4.2 kHz. Is this baffle diffraction related or an issue with the measurement conditions, or does the driver actually have a dip there?
  Reply With Quote

Reply


SB Acoustics SB17NAC35-4 measurements!Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
New SB Acoustics 3 way from Troels cph2000 Multi-Way 170 22nd January 2019 12:58 PM
SB Acoustics SB65WBAC25-4 - What to do? xrk971 Full Range 15 8th December 2017 07:20 PM
FS: SB Acoustics Kalasan (Original from SB Acoustics Factory) + Woofer modules fishball79 Swap Meet 7 18th April 2016 12:26 AM
SB Acoustics smallangryboy Multi-Way 13 26th April 2014 11:54 PM
SB Acoustics Satori MW16P-4 Measurements! gornir Multi-Way 18 24th June 2013 07:29 AM


New To Site? Need Help?

All times are GMT. The time now is 10:54 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki