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15" reflex design kick bin?
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rezsbc View Drop Down
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    Posted: 05 March 2008 at 1:06pm
Anyone got any advice for on a simple single 15" reflex box for kick?
 
Have a JBLSRX700 system comprising of reflex subs (SRX728S's) and double 12" tops (SRX722's).
 
System sounds good however the subs only run up to 80Hz, at which point the 12" takes over up to 1.2Khz where it's crossed to the compression driver.
 
For a while I've been thinking that it might be good to put another box between the subs and the tops to do upper bass kick.  We regularly hire this rig for techno/electro type events so I think a dedicated upper bass section would be a big improvement.
 
As the other boxes are all reflex designs I'd like to keep it that way with this as well. 
 
Sound like a workable idea?  Anyone know of any suitable plans?
 
nice one,
 
rez.
 
 


Edited by rezsbc - 05 March 2008 at 1:08pm
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Elliot Thompson View Drop Down
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Horns work best from frequeincies ranging over 80 Hertz than a reflex cabinet. You would be better of with the HD 15 than going the reflex route.

Best Regards,
Elliot Thompson
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I'd rather not have to deal with time allignment issues etc. if possible.
 
Everyone else agree?  Reflex sub and reflex mids are best matched with horn-loaded upper bass?
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darkmatter View Drop Down
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Maybe something like this, tuned higher:

http://www.speakerstore.nl/constructions/18sbr115/BR115draw.pdf

Two would stack pretty neatly on your double 18"s.

Or you could make dual 15s with a slot port in the middle for a fairly easy build, two 8ohm drivers in a cab = 4ohm load, less cabinets and less cables. Kind of depends how you wanna stack I guess.
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Elliot Thompson View Drop Down
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Originally posted by rezsbc rezsbc wrote:

I'd rather not have to deal with time allignment issues etc. if possible.
 

Everyone else agree?  Reflex sub and reflex mids are best matched with horn-loaded upper bass?


Once you are using multiple cabinets playing different frequencies, you will always encounter time alignment issues no matter what design.

"Kick" is an attack that comes from the front of the driver. A reflex reinforces the rear of the driver whereas the horn reinforces the front of the speaker. So, I don't see how you are benefiting with a reflex as a "Kick Bin" unless you are looking for a whole bunch of cabinet gain from the box that will make it sound more sustained in the long run.

If that's what you are looking for, than just buy some Scoops.

Best Regards,
Elliot Thompson
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Elliot Thompson View Drop Down
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Originally posted by rezsbc rezsbc wrote:

I'd rather not have to deal with time allignment issues etc. if possible.
 

Everyone else agree?  Reflex sub and reflex mids are best matched with horn-loaded upper bass?


Once you are using multiple cabinets playing different frequencies, you will always encounter time alignment issues no matter what design.

"Kick" is an attack that comes from the front of the driver. A reflex reinforces the rear of the driver whereas the horn reinforces the front of the speaker. So, I don't see how you are benefiting with a reflex as a "Kick Bin" unless you are looking for a whole bunch of cabinet gain from the box that will make it sound more sustained in the long run.


Edited by Elliot Thompson - 05 March 2008 at 2:35pm
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Once you are using multiple cabinets playing different frequencies, you will always encounter time alignment issues no matter what design.

"Kick" is an attack that comes from the front of the driver. A reflex reinforces the rear of the driver whereas the horn reinforces the front of the speaker. So, I don't see how you are benefiting with a reflex as a "Kick Bin" unless you are looking for a whole bunch of cabinet gain from the box that will make it sound more sustained in the long run.

If that is what you are looking for, than just buy some scoops.

Best Regards,

Edited by Elliot Thompson - 05 March 2008 at 2:38pm
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SteveAATW View Drop Down
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Direct radiating speakers are pants at fast transient bass, if you want a discernible kick it needs to be a horn
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Tony Wilkes View Drop Down
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Originally posted by SteveAATW SteveAATW wrote:

Direct radiating speakers are pants at fast transient bass, if you want a discernible kick it needs to be a horn


This has to be one of the most misleading things I have ever read on Speakerplans forum.

Tony
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adambomb View Drop Down
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Originally posted by Elliot Thompson Elliot Thompson wrote:

"Kick" is an attack that comes from the front of the driver.
 
This was pretty misleading too. IMO.
 
No kick from F218s or USBs then?
 
I wish people would give up on the whole "this comes from the front of the driver / this comes from the back of the driver" thing... it's a diaghram and the sound is pretty much the same either side (at the bass end anyway).


Edited by adambomb - 05 March 2008 at 3:55pm
www.freespeakerplans.com
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rich, ind.st View Drop Down
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Originally posted by Tony Wilkes Tony Wilkes wrote:

Originally posted by SteveAATW SteveAATW wrote:

Direct radiating speakers are pants at fast transient bass, if you want a discernible kick it needs to be a horn


This has to be one of the most misleading things I have ever read on Speakerplans forum.

Tony


i agree, the box sat infront of me dissagrees with steves statement. bear in mind i like music with kicks, techno, psytrance, hardtek, gabba etc... and am very familiar with martin 215 kick bins

its a double 12 reflex cab and kicks like a mule :)
http://www.speakerplans.com/forum/forum_posts.asp?TID=13831
music is god
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rich, ind.st View Drop Down
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oh yea, if you want plans for the cab send me a pm
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