2x18" MEATGRINDER v2 (done!) |
Post Reply | Page <1 910111213 22> |
Author | ||
tomschute
Old Croc Joined: 15 May 2006 Location: Mid Wales Status: Offline Points: 1817 |
Post Options
Thanks(0)
|
|
edit: sorry V3 - 2.83V Edited by tomschute - 12 September 2009 at 8:36am |
||
Out to lunch... stableaudio@hotmail.co.uk
www.stableaudio.co.uk Speaker Building Services |
||
kiriiz
Registered User Joined: 09 January 2009 Status: Offline Points: 70 |
Post Options
Thanks(0)
|
|
It seems like many widespread drivers work good in MGv3
|
||
Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
Post Options
Thanks(0)
|
|
Should be 2v Im now playing with porting it |
||
Jake_Fielder
Old Croc Joined: 08 October 2007 Status: Offline Points: 4231 |
Post Options
Thanks(0)
|
|
I couldnt do anything any good from porting it! bearing in mind the longest the port could be is about 90cm, and it coulnt be too large as there isnt much room, i was picturing two tubes going either side of the magnets.
Heres the plots overlayed, the one with slightly better response below 20Hz is the ported one... It might sound more "scoopy" if ported as the group delay get big around 40Hz when compared to the standart horn design. And excursion is better low down. |
||
tommysb
Registered User Joined: 24 April 2006 Location: Finland Status: Offline Points: 1036 |
Post Options
Thanks(0)
|
|
Where the porting becomes useful is in controlling excursion by the looks of it then!
|
||
tomschute
Old Croc Joined: 15 May 2006 Location: Mid Wales Status: Offline Points: 1817 |
Post Options
Thanks(0)
|
|
keeping this a usable cab my only thoughts are neo...
The BnC 18nw100 and RCF 18LF N401 only have 9mm xmax - what does this tell you... edit: 1200watt / 4 ohm In the real world with a XLim of 52mm how far can you push the driver? Even with porting you are seeing over excusion at the sweet spot - about 13.5mm?? Edited by tomschute - 12 September 2009 at 9:02am |
||
Out to lunch... stableaudio@hotmail.co.uk
www.stableaudio.co.uk Speaker Building Services |
||
pfly
Old Croc Joined: 25 October 2007 Location: Helsinki, Fin Status: Offline Points: 2828 |
Post Options
Thanks(0)
|
|
I've been fooling around with porting 1850 horn. Turns out, small port for example backwards in access panel should help control excursion in a way that with 1000W driven into V18-1000, excursion goes over Xmax somewhere around 25-30hz instead of 40-45hz. It adds some 5ms to group delay though and won't go any lower.
Edited by pfly - 12 September 2009 at 9:28am |
||
tomschute
Old Croc Joined: 15 May 2006 Location: Mid Wales Status: Offline Points: 1817 |
Post Options
Thanks(0)
|
|
indeed but not the case here: Could someone explain the deal. How far over xmax is safe? I know unless you're putting a perfect sine wave through you're never going to reach true max excusion anyhow. But would be a costly test to try.... |
||
Out to lunch... stableaudio@hotmail.co.uk
www.stableaudio.co.uk Speaker Building Services |
||
Amano
Registered User Joined: 06 October 2008 Location: Russia Status: Offline Points: 219 |
Post Options
Thanks(0)
|
|
seems very nice for 18NLW9600!
|
||
levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
Post Options
Thanks(0)
|
|
|
||
"Who am I? I'm the guy who does his job.. You must be the other guy".
|
||
mykey
Old Croc Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
Post Options
Thanks(0)
|
|
I would stop looking at graphs and be more concerned about the throat to mouth PASSAGE, that messy fold after the throat area doesn't look to good
if you want to see a perfect example of a throat exit to horn, look at Minimaxils Terra horn, SMOOTH as a bar of galaxy chocolate
|
||
levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
Post Options
Thanks(0)
|
|
Anything constructive, to follow that criticism... |
||
"Who am I? I'm the guy who does his job.. You must be the other guy".
|
||
Post Reply | Page <1 910111213 22> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |