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-   -   DIY a baffle for JBL fullrange and super treble Celestion (http://www.diyaudio.com/forums/full-range/219886-diy-baffle-jbl-fullrange-super-treble-celestion.html)

YaoSiTing 17th September 2012 11:42 AM

DIY a baffle for JBL fullrange and super treble Celestion
 
Hi all,
I have a pair of JBL 2120 Pro and super treble Celestion ballet, I want to make a new baffle for them. I have find on internet already but didnot have any details for JBL driver like this :confused:.
Please could you help have a suggestion or document/picture drawing?
Thanks you

j.michael droke 19th September 2012 12:02 AM

JBL 2120 Pro loudspeaker
 
Quote:

Originally Posted by YaoSiTing (Post 3168051)
Hi all,
I have a pair of JBL 2120 Pro and super treble Celestion ballet, I want to make a new baffle for them. I have [looked] on the internet already but didnot find any details for JBL driver like this :confused:.Please could you help or have a suggestion or document/picture drawing?Thanks you

Hi there YS: I googled, jbl 2120 pro louadspeaker and found the following information:
Extended range transducer, 50hz to 8,000hz, Imp. 8 ohms, 60 watts contineous, 98db at 1w/1m, Fs=65hz, 3-inch edge wound aluminmum voice coil, BL=1.4x(10)7. Pictures too.
However this information provided by JBL is insufficient to design an enclosure (computer program or charts) with out other T/S parameters: Qes, Qms, Qts, Vas, Re, Le, Sd, Xmax.
Note that Qts can be calculated easily from Qes and Qms. Xmax should be known for a complete design. Sd can be estimated from the drivers frame size (results will vary with your estimate)
If you can not find the required T/S parameters, you can measure them easily with a WT 3 instrument available from Parts Express, see their on line catalog, page 168 $99.88usd.
....regards, Michael

YaoSiTing 19th September 2012 08:44 AM

Thanks Michael for quickly feedback,
I understand your advice, but I dont have much knowledge about this. I'm looking for a Bass reflex enclosure plan that can using for my JBL fullrange driver and supper treble HF-50 (optional). The baffle plan is as simple as good for me.
Any idea for this?
Thanks for any feedback

YaoSiTing 19th September 2012 08:48 AM

2 Attachment(s)
Please updated with more information details of JBL and Celestion treble

YaoSiTing 21st September 2012 04:20 AM

Hello, anybody here! Please help


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