audio nirvana super8 cabinets decision - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 19th July 2010, 02:44 PM   #11
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
In that case, assuming you do not wish to support your drivers with dedicated woofers, you're more likely to benefit from tuning slightly higher, to get more gain in the ~ 60Hz - 120Hz region, which is where most of the bass energy resides. There is rather less going on below that point; FWIW, my inclination would be to run a BIB with the appropriate Vb, but tuned to a slightly higher frequency than Fs. Terry Cain's original used a 70in box giving a ~140in horn that's 1/2 wave at 48Hz.
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 19th July 2010, 04:05 PM   #12
diyAudio Member
 
Join Date: Apr 2010
I ended up putting the super 8's in a half-chang about 8 weeks ago. They sound better and better. They have plenty of low end. If you live anywhere near DFW please come by and hear them.
  Reply With Quote
Old 19th July 2010, 04:08 PM   #13
diyAudio Member
 
Join Date: Apr 2010
http://home.swbell.net/hebert11/3113..._2386730_n.jpg
  Reply With Quote
Old 21st July 2010, 01:32 AM   #14
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
my super8 will get Karlson-couplers - perhaps smaller than the 3.3 cubic foot external bulk K12 which outperforms my blh (and Khorn - subjectively)
Click the image to open in full size.
have run outta room !

this will be the smaller test cabinet for FE206EN and Super 8 and specs for two apertures

first pix from kutter
Click the image to open in full size.
Click the image to open in full size.


Parameters:


Gap Slope p q Area Length Wmax
0.25 1.5 3 12 83.6 18.5 12


x w
0.00 0.50
1.00 0.50
2.00 0.52
3.00 0.55
4.00 0.62
5.00 0.74
6.00 0.92
7.00 1.16
8.00 1.49
9.00 1.91
10.00 2.43
11.00 3.07
12.00 3.84
13.00 4.74
14.00 5.78
15.00 6.97
16.00 8.29
17.00 9.73
18.00 11.24
18.50 12.00

********************
Number Two


Gap Slope p q Area Length Wmax
0.5 2.9 1.08 9.5 131.9 18.5 12



Aperture
x w
0 0.50
1 0.78
2 1.10
3 1.43
4 1.76
5 2.11
6 2.46
7 2.81
8 3.17
9 3.54
10 3.91
11 4.30
12 4.72
13 5.18
14 5.73
15 6.43
16 7.38
17 8.72
18 10.69
18.5 12.00

Last edited by freddi; 21st July 2010 at 01:58 AM.
  Reply With Quote
Old 2nd February 2013, 06:30 PM   #15
diyAudio Member
 
Join Date: Mar 2011
Location: north east pa.
ya should go with the 2.8 with 2 3in. ports ,you should have gotten a plans from common sense when they sold you the drivers. ?????? no?
  Reply With Quote
Old 2nd February 2013, 10:03 PM   #16
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Hmm. I think the Standard 8 in the CSA 2.8ft^3 box with twin 3in ports is a trifle misaligned, assuming the published driver specs. to be accurate.

Examples for three different vent lengths (3/4in 3in & 6in) attached, with a variation of each for voltage source amplifiers and something with a higher output impedance.
Attached Images
File Type: gif 0.75in duct length low DF.gif (33.5 KB, 99 views)
File Type: gif 0.75in duct length voltage source.gif (34.8 KB, 99 views)
File Type: gif 3in duct length low DF.gif (34.4 KB, 10 views)
File Type: gif 3in duct length voltage source.gif (34.7 KB, 9 views)
File Type: gif 6in duct length low DF.gif (33.8 KB, 12 views)
File Type: gif 6in duct length voltage source.gif (34.1 KB, 13 views)
  Reply With Quote
Old 3rd February 2013, 11:45 AM   #17
diyAudio Member
 
Join Date: Mar 2011
Location: north east pa.
Default AN super 8's

I'll take a trifle misalignment,as compared to something with multi drivers and crossover that cost $10,000.00 and does'nt sound as good . like I said I have a superzen ,2.3watts per channel . the 2.8 with an super 8's cost $400.00 tops, 99 db sensitivity, is'nt this about maximum fidelity, minimum cost? to us...............
  Reply With Quote
Old 3rd February 2013, 12:45 PM   #18
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
It can be, but it doesn't automatically have to be. BTW, the datasheet lists as 95.4dB 1m/w rather than 99; back calculating from the published specs., that appears to be correct.

My problem with a misalignment is that by definition, it's not necessary (I was being [very] polite with the 'trifle').

Last edited by Scottmoose; 3rd February 2013 at 12:52 PM.
  Reply With Quote
Old 3rd February 2013, 01:02 PM   #19
xrk971 is online now xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Is the misalignment you are referring to the excessive overshoot bump? Could that not be easily fixed by tuning just a hair lower in frequency (tiny bit longer port)?
  Reply With Quote
Old 3rd February 2013, 10:25 PM   #20
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Unfortunately not. You can see for yourself. I gave three different example tuning alignments above for the Standard 8 in the CSA 2.8ft^3 box, with both a voltage source & a high output impedance amplifier. Tuning it lower isn't going to make things any better.
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS/FT Audio Nirvana Super 12 Cast Frame drivers in custom cabinets vaughn Swap Meet 12 5th April 2010 01:51 PM
Fostex or Audio Nirvana? mikje Multi-Way 17 17th July 2008 02:12 AM
ApexJr super8 fun theNoid Subwoofers 14 1st December 2006 07:16 PM
Audio Nirvana Andy9485 Multi-Way 6 21st November 2006 11:46 PM
Audio Nirvana - Where Is It? How Do We Get There? Bas Horneman Everything Else 9 25th January 2006 02:05 AM


New To Site? Need Help?

All times are GMT. The time now is 03:32 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2