Official JBL CS1214 thread - Replacement for Infinity 1260/1262 - Page 4 - AVS Forum | Home Theater Discussions And Reviews
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post #91 of 368 Old 08-29-2016, 10:49 PM
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Quote:
Originally Posted by Johnny P View Post
The ones 2.5 feet from mlp are going to used as mbms(mid bass modules)??? Or in other terms tactile response??
no just normal sub use.

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post #92 of 368 Old 08-30-2016, 07:14 AM - Thread Starter
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Getting ready for tomorrow's build!


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post #93 of 368 Old 08-30-2016, 11:52 AM
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Originally Posted by corradizo View Post
When I built my first subs I used car boxes, braced them with 2x4's, stuffed them with r13 and they worked great. If you don't mind the carpet, they are fine.
Thanks for that. Do you have any experience with DIYSG flatpacks?

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post #94 of 368 Old 08-30-2016, 12:46 PM
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Originally Posted by 1st Cav View Post
Thanks for that. Do you have any experience with DIYSG flatpacks?

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Yes. My ht18's are in the 4cuft flat packs. Put them together with glue and painters tape...see my sig.
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post #95 of 368 Old 08-30-2016, 03:14 PM
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So is it a yay or nay on these working with the 1.5Cu Belva boxes on Sonicelectronix?

http://www.sonicelectronix.com/item_...-MDFS1215.html
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post #96 of 368 Old 08-30-2016, 03:40 PM
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Originally Posted by edzyy View Post
So is it a yay or nay on these working with the 1.5Cu Belva boxes on Sonicelectronix?

http://www.sonicelectronix.com/item_...-MDFS1215.html
There doesn't appear to be any bracing in these.
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post #97 of 368 Old 08-30-2016, 03:54 PM
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post #98 of 368 Old 08-30-2016, 06:18 PM
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Thanks styjp for starting this JBL thread.
I know a lot of the discussion has been around sealed boxes for near-field use, but to me the major benefit of the Infinity driver was the ability to obtain flat response down to 20 hz and below in a reasonably sized ported box.
As noted before, the CS1214 wants a larger ported box (7-8 cuft) for optimal low end response. I was going to recommend the JBL GT5-12 however after simulating it against the CS1214 in a non-optimal smaller ported box there isn't enough difference to warrant passing up the current crazy deal on the CS1214.

Here is the maximum output for each driver in a 4.5 cuft net enclosure ported to 20 Hz and for the CS1214 in a 2.5 cuft sealed box.



For a real world example here are the details of my Infinity setup. (I think I posted a similar graph over on the Infinity thread a few weeks ago.) Similar results can be had with the CS1214, but likely a couple db less output below 30 Hz.

I have four subs, one in each corner of my small theater (13'X14'). A 1262W in each 4.5 cuft net cabinet ported to 20 Hz driven by an NU3000DSP, high passed at 20 Hz, Butterworth 24db/octave. Measured from the listening position at back wall center. One could argue that the distortion just above tuning is excessive at this level, but I wanted to take the system to the limit. I can improve the response below 20 Hz by switching to a 12db slope however the distortion skyrockets below tuning. My understanding is that 115 db from 20 Hz and up is considered reference level, which my setup makes (just barely).

For those considering using multiple 12's in sealed boxes realize that your response will be about 10db down at 20 hz, which would require a dozen of the CS1214's and 3000 watts of power to reach reference, even in a small closed room.

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Last edited by DavidK442; 08-30-2016 at 07:40 PM.
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post #99 of 368 Old 08-31-2016, 06:45 PM
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My 4x CS1214 should arrive tomorrow.
Now I am still thinking if I swap the stock driver from the eD A2-300 that I bought used or wait for some 1260W to pop up (because my first a2-300 has 1260W).
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post #100 of 368 Old 09-01-2016, 03:01 PM
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Gonna flip a coin tonight

8 of these or 2 Dayton RS 15 cube kits from DIYsound

http://www.diysoundgroup.com/dayton15-cube-kit.html
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post #101 of 368 Old 09-01-2016, 05:06 PM
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thanks to mtg90 who posted the ts on these . i was able to model them and compare 4 of them to 2x um18s from parts express in their sealed 4cu ft box

4 cs 1214s with 250 watts each is yellow line
vs 2 um18s each in a 4 cuft box with 1000 watts each in blue

mine should arrive mid next week

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THANK YOU!!! for your selfless contribution to the audio world
Anders Torger for Brutefir
Thomas Drugeon for Rephase
John Mulcahy for room eq wizard
Denis Sbragion for DRC room correction
Juha Hartikainen for Winisd

Last edited by 1201; 09-01-2016 at 05:11 PM.
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post #102 of 368 Old 09-01-2016, 06:00 PM
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Quote:
Originally Posted by edzyy View Post
Gonna flip a coin tonight

8 of these or 2 Dayton RS 15 cube kits from DIYsound

http://www.diysoundgroup.com/dayton15-cube-kit.html
Roughly 2 Dayton RS 15 cube kits equals 4 JBL's, but to have similar low end capabilities the JBL's will require twice as much box as the Daytons. (16 cuft net vs 8 cuft net). Four CS1214's would be driven quite nicely by a Behringer NU3000DSP for a total cost of around $500, excluding materials and time to make the 4 large sub enclosures, which is significant.

That is an interesting comparison.
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post #103 of 368 Old 09-01-2016, 06:22 PM
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Quote:
Originally Posted by 1201 View Post
thanks to mtg90 who posted the ts on these . i was able to model them and compare 4 of them to 2x um18s from parts express in their sealed 4cu ft box

4 cs 1214s with 250 watts each is yellow line
vs 2 um18s each in a 4 cuft box with 1000 watts each in blue

mine should arrive mid next week

What did you calculate the size of the enclosure for ea CS1214?
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post #104 of 368 Old 09-01-2016, 08:10 PM
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Originally Posted by Michael Mitten View Post
What did you calculate the size of the enclosure for ea CS1214?
i guess i should have clarified that this was done for a buddy who is purchasing two of the ultimax 18/4 cu sealed kits, vs me building my boxes myself so no limitation.

so to answer your question, winisd is showing a ~5 cu. ft box per cs1214.

here is an image showing
4x1.5 cu ft box , yellow line
4x2.0 cu ft box, green line
4x5.15 cu ft box, red line
and for comparison a
2x4.0 cu ft box with ultimax 18, blue line

cs1214s are modelled at 250 watts each, 3m distance
ultimax 18 modelled at 1000 watts each, 3m distance
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post #105 of 368 Old 09-01-2016, 09:40 PM - Thread Starter
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Official JBL CS1214 thread - Replacement for Infinity 1260/1262

Progress update. Half of the boxes built.




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post #106 of 368 Old 09-01-2016, 10:34 PM
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looking good . what are the dimensions?

thanks

THANK YOU!!! for your selfless contribution to the audio world
Anders Torger for Brutefir
Thomas Drugeon for Rephase
John Mulcahy for room eq wizard
Denis Sbragion for DRC room correction
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post #107 of 368 Old 09-01-2016, 10:41 PM - Thread Starter
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looking good . what are the dimensions?



thanks


Thanks. 1.7cf.


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post #108 of 368 Old 09-01-2016, 10:58 PM
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nice. thanks for posting that. just in case i go that size.

for now, im thinking of doing two as side tables in a 2ft cube.

THANK YOU!!! for your selfless contribution to the audio world
Anders Torger for Brutefir
Thomas Drugeon for Rephase
John Mulcahy for room eq wizard
Denis Sbragion for DRC room correction
Juha Hartikainen for Winisd

Last edited by 1201; 09-01-2016 at 11:06 PM.
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post #109 of 368 Old 09-02-2016, 03:02 AM - Thread Starter
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Official JBL CS1214 thread - Replacement for Infinity 1260/1262

Quote:
Originally Posted by 1201 View Post
nice. thanks for posting that. just in case i go that size.



for now, im thinking of doing two as side tables in a 2ft cube.


No problem! they would work nice as side tables. I'm planning on doing a faux wood effect on these using the graining tools

Please note that the parts are incorrectly named. If you follow this you need to take into consideration where you want the sub to be facing. I put the sub and feet on the back and made this a downfiring and routed the front part (which is now on top).


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post #110 of 368 Old 09-04-2016, 08:17 AM - Thread Starter
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Got a lot of progress and the subs are now all finished. I will probably upload all the photos tomorrow for you once I got some sunlight again and the varnish dries out. Just a small sample for now. The wood graining tool worked great and the colour matches my whardefale speakers. Very happy with the outcome!
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post #111 of 368 Old 09-04-2016, 11:25 AM
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Originally Posted by styjp View Post
Got a lot of progress and the subs are now all finished. I will probably upload all the photos tomorrow for you once I got some sunlight again and the varnish dries out. Just a small sample for now. The wood graining tool worked great and the colour matches my whardefale speakers. Very happy with the outcome!
Looking good man. Great job
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post #112 of 368 Old 09-04-2016, 11:36 AM
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Originally Posted by styjp View Post
Got a lot of progress and the subs are now all finished. I will probably upload all the photos tomorrow for you once I got some sunlight again and the varnish dries out. Just a small sample for now. The wood graining tool worked great and the colour matches my whardefale speakers. Very happy with the outcome!
Looking good!

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post #113 of 368 Old 09-04-2016, 12:02 PM
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Originally Posted by styjp View Post
Got a lot of progress and the subs are now all finished. I will probably upload all the photos tomorrow for you once I got some sunlight again and the varnish dries out. Just a small sample for now. The wood graining tool worked great and the colour matches my whardefale speakers. Very happy with the outcome!
You're a machine! Nice work.
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post #114 of 368 Old 09-04-2016, 12:45 PM
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post #115 of 368 Old 09-04-2016, 02:15 PM - Thread Starter
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Thank you guys! Not bad for a first build! Couldn't hope for a better finish. They also look nicely sealed too. Do you guys think that polyfill is a must? I don't have any, or any extra pillows and i will need to go buy some. Is pillow stuffing ok?


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post #116 of 368 Old 09-04-2016, 03:12 PM
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Thank you guys! Not bad for a first build! Couldn't hope for a better finish.

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I love that finish. I wish I could get that quality.
While at it, the about picture of the dimensions page you posted. Are these available as flat packs from somewhere?
If that be the case, I would be interested to know.
Thanks again for sharing these.
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post #117 of 368 Old 09-04-2016, 03:26 PM
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post #118 of 368 Old 09-04-2016, 04:07 PM
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i got some wood cut and some pieces glued. now, the real work begins. BIG HUGE thanks to @styjp for helping me immensely over pm. this is a first for me and he came through with some awesome information.

3.3 cu ft sealed box. tops are not glued on yet as i have to still brace the box.






my cutlist. three boxes fit neatly on two 4x8 sheets,with some left overs for bracing.
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THANK YOU!!! for your selfless contribution to the audio world
Anders Torger for Brutefir
Thomas Drugeon for Rephase
John Mulcahy for room eq wizard
Denis Sbragion for DRC room correction
Juha Hartikainen for Winisd

Last edited by 1201; 09-04-2016 at 06:19 PM.
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post #119 of 368 Old 09-04-2016, 05:31 PM
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Quote:
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No problem! they would work nice as side tables. I'm planning on doing a faux wood effect on these using the graining tools



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Can you describe the wood training process please
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post #120 of 368 Old 09-04-2016, 08:31 PM - Thread Starter
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Can you describe the wood training process please


No problem. I first used a primer to seal the boxes so the wood doesn't suck all the stainer. I had the shop to add as much black as possible to the primer so it looked light grey. After the primer dried, you paint each side with a stainer of desired colour and use the "wood grain tool" to make the lines. There are a lot of videos on youtube that explain how to use it, you just have to rock it back and forth while sliding it over the wet paint so it removes some of it. After this was done I had to paint all the boxes with a thinned ebony stainer so the boxes became black with dark grey wood grain lines. I did this twice to get the desired colour and depth. Lastly, I used a hard clear matte wood floor varnish for protection. I hope this makes sense!

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