4343 References Thread - Any Drawings/Plans/Assembly with Dimensions To Add?
In the Lansing Product Technical Help (one of my favorite sections!) under 4343 References Thread Heather said:" Please note - I have just begun this thread and have a LOT left to add ..." back in 2007.
Now, Heather does a brilliant job on the Heritage site but can only do 'so much' if she isn't given a whole lot more to go on, without laboriously searching the "many" threads for extra info to put into Reference Threads like these - Plus - the amount of "interest", has to make it worthwhile.
Since the demise of availability of Recones and drivers to use; the 43xx 4 - way Series has to succumb to being damn difficult to build yourself one as a Project because you just can't get the Parts together...
Recently, I have been delighted to see that JBL C8R2235 Recones ARE once again available! A quick look on ebay tells me that the 10" frames aren't entirely gone with the dinosaurs, so making something up isn't so "out of reach" after all! :applaud:
So as far as the 4343 is concerned, "Do we have a set of Working Drawings" to go off?
I see we had one new member build himself a nice set of '4343' speakers but I have no idea where he got all his measurements from? This Forum? I haven't been able to find a front baffle layout beside the one I drew up ages ago - which I don't even know is "truely" accurate to an original...?
I am convinced that using a Caberet Series 4628 box which holds my 2235 and a separate box (old stereo boxes with a new baffle) 11" wide on its side to hold the 10" and sitting on top of this a 2240 and 2405 side by side don't sound as good as they could if they were all in a proper Cabinet! I suppose I can get the basic size from the 4344 Design Cut download for my cabinets and just trust my own drawing to be "close enough" for the front baffle but I KNOW I won't be happy with it because I'll never know if it IS right?
ARE these designs worth saving and having proper Build Records of, or have people moved on and aren't fussed with the Blue Baffle Brigade anymore..? :dont-know:
I know I AM - even if I DO have to get someone else to build the boxes for me because I can't 'do' those things anymore. I 'would' like to see my parts and proper crossover in a box.. one day. (and NO, I don't feel better now..) :(
DogBox
[Steve G.]
[Yes, I know the 2240 isn't 4343 parts, but it DOES sound nice!]
4343 Nitty Gritty! At Last..
Quote:
Originally Posted by
Ian Mackenzie
What happened was by the time people got interested in cloning the 4 way systems the 4344 had been around for a while and with the more refined 2122H mid they went the 4344 route.
The primary differences are in the baffle layout and the 4343 had a rotatable upper baffle for the mid-horn array.
When you get to the crossover let me know what you decided on and l will give you some technical support around optimising the results.
Hi Ian,
Glad to be finally in conversation! I have gotten to the crossover stage some time back as I have been listening to a going concern for some time. I made up
a 3143 crossover as per the circuit diagram but put each drivers parts on separate 3mm thick MDF board. I have one for the LF and MF, one for the HF and one for the
UHF. I have JBL 2235; (very good aftermarket) 2122, JBL 2440-[D16R2445], 2405-[orig.JBL] Having the 2235's in a 4628 Caberet box with the 2122's in separate sealed boxes on top with the 2405's & 2440's mounted on some 11 1/4"Wx7"H 3/4" Chip Board to be able to mount the lenses, with the 2405's sitting next to them. As a "set-up" it sounds impressive but not as good as it could if I had everything mounted in a proper cabinet...
Taking another look at those boxes 4313B made up ( http://www.audioheritage.org/vbullet...1&d=1261019971 ) I just might do the same thing but with the 4343 drivers. If I can't get measurements - I'll just use the physical size of the 4344 and place everything "in line", off-centre, and try to keep roughly the same spacing between the speakers. I DO want to recone my other E-110's with the C8R2121's I bought ages ago and use those instead of the aftermarket 2122's I'm using at present.
I'm sure you could help me greatly with your expertise in the crossover area! I just wanted it up and running and its been that way for the last 3 1/2 odd years!
Truly Grateful for your offer to Help! Boy, I need it!!!
Kind Regards,
Steve
Aftermarket or not! I'm still curious..
Quote:
Originally Posted by
Ian Mackenzie
The finalisation will need the passive crossover re worked for response and impedance variations with the originally specified 1 inch 2420 and later 2425 compression drivers. Pm me on that.
Will do.
Best all drivers in a vertical line.
I know the original 4343 'did' have them in a vertical line but that "line was the center-line of the cabinet!" I was thinking of shifting that off to one side and mirror position the other side/speaker. Just how far 'off-center' I am not sure... :dont-know: Any takers??
You will also need to re shape the dog box to fit the larger diameter compression driver if you decide to keep the original baffle spacing.
Well now I know "how sweet it is" I would like to keep it [2440]. I have some D16R2451-SL diaphragms coming just for the occasion! Dog box to suit!!
I have also been thinking about the MF crossover parts I am using - they should be for the 2122 I am using, albeit an aftermarket recone... Looking at the 3145
schematic, it's not the same as the 4343, so I also have some parts coming to change that over. I probably should change the HF section after the 4350 but think I
would be getting the crossover too far out-of-whack with things not designed to 'be' with one another... My downfall.. I just don't know enough of what I am doing
and expecting the changes to be ok with each other - I know it doesn't work that way..:( It will keep me fiddling around in between looking after my mum upstairs!
Always open to comments and advice! That's what I love about the people on this site/forum... plenty of willing advice! ;)
Many Thanks!!!
Steve