EDIT . The thread still goes
But the PRV 15SW2000 driver was choosen
Now is matter of time to set on a cabinet design.
Guys ,
I am still considering different options that I am learning along the way.
Just one thing
I don't need any extension above 100hz
And I don't care strange dips above 100 that's will shaved of by the drive rack.
3015LF is my choosen driver
Cause I can drive 3 cabinets per channel at around 2.5 ohms
So 6 cabinets total , 3 each amp side
With my current amplification
I have 2 options
Screamers furysub
jbell SS15
Love Jbell stadium horn...but 150lbs of ply and the size is deal breaker for my mobile gigs.
I want
1/2" ply for weight easiness and transportation
Since screamerusa site is down
I could not able to pull the last revision of the furysub , somebody build a box beside screamer and says it have some freq discrepancies so he build the apache instead.
Idk if somebody have a working drawing for the furysub.
So kapalite 3015LF 8 ohm will be used on all boxes.
What you guys can advice.
Pros and cons please.
Next will be the tops to complement the subs
What screamer used was the jbell top box? With the arrayed piezos?
Anyway i want to attack the sub cabinet 1st
Best.
Max.
But the PRV 15SW2000 driver was choosen
Now is matter of time to set on a cabinet design.
Guys ,
I am still considering different options that I am learning along the way.
Just one thing
I don't need any extension above 100hz
And I don't care strange dips above 100 that's will shaved of by the drive rack.
3015LF is my choosen driver
Cause I can drive 3 cabinets per channel at around 2.5 ohms
So 6 cabinets total , 3 each amp side
With my current amplification
I have 2 options
Screamers furysub
jbell SS15
Love Jbell stadium horn...but 150lbs of ply and the size is deal breaker for my mobile gigs.
I want
1/2" ply for weight easiness and transportation
Since screamerusa site is down
I could not able to pull the last revision of the furysub , somebody build a box beside screamer and says it have some freq discrepancies so he build the apache instead.
Idk if somebody have a working drawing for the furysub.
So kapalite 3015LF 8 ohm will be used on all boxes.
What you guys can advice.
Pros and cons please.
Next will be the tops to complement the subs
What screamer used was the jbell top box? With the arrayed piezos?
Anyway i want to attack the sub cabinet 1st
Best.
Max.
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Hofmann's Iron Law...loud, low, small...pick 2. You stated an 100hz maximum frequency, what's the minimum frequency....30, 40, or 50hz?
No the stadium horn was around 36x46x24 , ss15 was not a cube
1 sheet of ply TH horn shaped like a mini TH18 kind off, the 2' cube was like a CUBO design al outer dimensions 24" the secret was the folding inside.
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Driver Kapa 3015LF 8ohm
Lower end...can be 30 up to 40;but not less than 40 ...50 is a big no.
Actually I don't want to reinvent the wheel
Just need help what to get from those 3 designs.
Apache
https://freespeakerplans.com/plans/14-plans/basscab/10-apache-h15
Jbell 2' cube
Post#376
https://www.diyaudio.com/community/threads/jbells-set-of-four-tapped-horns.127908/page-19
Let me find screamerusa furysub sketch
Can't get a final design
All of those work with the 3015LF
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Yeah that's the jbell cube,
So I just need help to decide what to get from those 3.
I pasted the apache plans link and cube. On my past response
So I just need help to decide what to get from those 3.
I pasted the apache plans link and cube. On my past response
The hornresp from Jbell cube is in the thread where the plan is, what I need help is to translate the apache plans in to hornresp data so to simulate with the 3015LF, according to some people it resemble the furybox, so comparing the 2 graphs will make the final decision.
The Cube use only 1 sheet of 1/2" ply and you have leftovers so really light, and with the 10lbs kapalite, it will be the handicap back man delight 🙂
The Cube use only 1 sheet of 1/2" ply and you have leftovers so really light, and with the 10lbs kapalite, it will be the handicap back man delight 🙂
IMO The 3015 LF's t/s parameters don't suggest TH alignments to me. Motor strength is too low, and Mms is a bit low as well.
Well that's the driver jbell used for the 2' cube and screamer furybox and somebody loaded the apache with it, and yes is not a top of the line driver for sub duty by 2023 standards but don't cost 700+ bucks and it's a 10lbs only driver so it checks all my boxes.
I don't want to deviate with another driver since those designs use them already.
In the 37 page thread they commented that because some compression the driver don't explode to pieces. Not thermal compression.
So I will plan to make pairs of them so I can scale as I need and don't haul TH18 or keystones, that I love the specs but don't have the means to carry. And load weight wise .
I just asked for help to Compare the boxes I listed
Idk if don Snyder still hangs around here.
He did it he drawings for Jbell 2' cube.
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I know it was many years back but you commented also on the thread were the jbell cube originated
https://www.diyaudio.com/community/threads/jbells-set-of-four-tapped-horns.127908/page-20
Thanks. I had a look and reminded myself. The 2^3 TH is a bit small for the 3015. JBell modeled it as a stack of 4, which flattened out the response a bit. And in those days we didn't have the benefit of including semi-inductance parameters in the modelling.
The layout and model can be derived using my BOXPLAN-MTC workbook at my website.
The apache is bigger than the jbell cube so I guess it hits lower although on the comments on the plans it says it reach to 120 in singles and in groups (i guess 4) it reach 200....uh? Why that cult of making a sub a kick bin. I mean i don't effin.care above 100 or even 90, but looks like there was or is a fashion of having a cabinet that can cover as wide as possible.gezz
Anyway, if the cube can be tweaked to shift the response towards lower it will be great, I don't effin care that reach 160, actually I prefer up to 90 or 100 as I said already , shave the high end , let the lower end to flow 🙂
The 3015 models better in a larger box.
The higher the subwoofer can go, the easier it is to blend it with the main speakers.
Here's a comparison between the JBL TH and an MLTL and shelf-vented design taking up the same 2x2x2 cabinet space with 0.5" ply. Hornresp does not include the effect of losses in the TH and MLTL sims, so that needs to be taken in mind (with losses taken into consideration, the MLTL's low end response will likely be identical to the response of the shelf-vented design).
FWIW, I wouldn't build an MLTL or shelf-vented box for this subwoofer out of 0.5" ply 🙂. With a TH, the internal panels help to stiffen the box.
The higher the subwoofer can go, the easier it is to blend it with the main speakers.
Here's a comparison between the JBL TH and an MLTL and shelf-vented design taking up the same 2x2x2 cabinet space with 0.5" ply. Hornresp does not include the effect of losses in the TH and MLTL sims, so that needs to be taken in mind (with losses taken into consideration, the MLTL's low end response will likely be identical to the response of the shelf-vented design).
FWIW, I wouldn't build an MLTL or shelf-vented box for this subwoofer out of 0.5" ply 🙂. With a TH, the internal panels help to stiffen the box.
Well that's what Jbell build and he was happy with his 2' cube so I guess I will too, I want a turnkey design for now,later on In the future when I feel comfortable playing with hornresp on my own, and then maybe I can take the step on doing my own design or tweak and old one for a given driver. In the meantime I want the 3015LF as my don't break the bank neodymium driver. 1/2 inch ply Jbell used and he did not complain so I will follow his lead. Yeah maybe some bracing on the critical panels.
I need portable and scalable so what you think about the JCube
Hey what about your long long TL, i like that one also 🙂 3015LF
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