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ultimate reflex for sub

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KidCreole View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KidCreole Quote  Post ReplyReply Direct Link To This Post Posted: 15 May 2014 at 11:50pm
Originally posted by Dub Specialist Sound Dub Specialist Sound wrote:

Didnt celestion have a simliar type scoop many years ago...
Nothing new. Not sure about Celestion doing one though
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Elliot Thompson View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2014 at 12:18am

Originally posted by Pasi Pasi wrote:

Originally posted by Timebomb Timebomb wrote:

Its the same with all cabinets though, not just reflex, i under stand your point and aggree, ive run large stacks of HD15s and got fairly high spl even though there only loaded with kappaLF and given 300W max,  i do think drivers with a stronger motor would perform better and have a higher ultimate sensitivity though as they would deal with the high loading of large arrays better. 

 


Yes, of course it's not limited to reflex only, but originally it was just a response to Lev claiming what he claimed. I just proved the point that he is actually wrong on this case.

Strong motor and low qts equals less low end, so it's a trade off again. Elliot Thompson has been saying this for long time, if you want to get low low with minimum effort, don't use the drivers with high electrical damping.



Exactly

Low Low with minimum effort would equate to what is shown below...



Don't expect to get such as response with high electrical damping drivers.

Best Regards,
Elliot Thompson
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volcano View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volcano Quote  Post ReplyReply Direct Link To This Post Posted: 14 September 2016 at 10:03pm
Originally posted by MarjanM MarjanM wrote:

BMS 18N862 would be my choice for going deep. 550lit box with two of those will have f3 of 27Hz.
You would not like the price :-)

30-80hz is too wide to make such a big peak. Chose either 30 or 80. Can not have both in a reflex.


Sorry to revive this, but I'm planning to build subs with a single BMS 18N862 in a 200L cabinet tuned to 30Hz, they will be crossed over at 100Hz.
Are you saying that this speaker tuned to 30Hz will give a bad respons in the upper 70-100Hz range?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 15 September 2016 at 12:54pm
Originally posted by volcano volcano wrote:

Originally posted by MarjanM MarjanM wrote:

BMS 18N862 would be my choice for going deep. 550lit box with two of those will have f3 of 27Hz.
You would not like the price :-)
 
30-80hz is too wide to make such a big peak. Chose either 30 or 80. Can not have both in a reflex.


Sorry to revive this, but I'm planning to build subs with a single BMS 18N862 in a 200L cabinet tuned to 30Hz, they will be crossed over at 100Hz.
Are you saying that this speaker tuned to 30Hz will give a bad respons in the upper 70-100Hz range?
 
He was refering specifically to this request, about creating a hump in the response over a relatively broad range of frequencies:
 
Originally posted by MRT MRT wrote:

And this might be a bit stupid question but when designing a reflex box for the previously mentioned frequency range, would it be more efficient if there would be a peak in 30-80 hz obtained in the box design when the box is only meant to play those frequencies and there would be dedicated boxes for bass above that frequency range?
 
With a vented box, you can't really make such a broad hump, but it should sound fine if you tune for a flat response over the 30-100Hz range.
 
HTH,
David.
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