Setting Up the 4343s: Help / advice wanted
Hi,
can anyone point me to a clear procedure for setting up the L pads on the 4343s? I have a sound meter and access to a signal generator, but I am not sure of the frequencies to choose nor of the levels to aim at. In other words, not a clue! :(
Today the new foam surrounds for the bass units arrived. And just in time too... as a bass-heavy track left pieces of foam scattered over the carpet. I am expecting the bass to get even tighter with the repair fo the surrounds, but even now it is considerably tighter than my memory of the L300s. :)
JBL 4343 Grilles and Setup
Hi,
I seem to have answered my own question regarding the set-up. A colleague appears to have a pair of "golden ears" and infinite patience and went through an extended adjustment session with me on a variety of music. We arrived at a setting which we both appreciated. Whether this is "right" probably does not matter.. they sound glorious.
There is another small problem. Eagle-eyed readers might have noticed something odd about the grilles shown in my photographs above. The JBL model number plate is fixed to the top of the grille and extends in front of the tweeter and super-tweeter, doing nothing good to the sound at all. I have so far not been able to find the recommended position for the JBL model-number plate, except to guess that it should be at the bottom of the grille. Can anyone provide me with photographs and / or measurements of the correct position of this plate. I really would like to get it right when I do move it. Most photographs that I have come across avoid showing JBL grilles, in favour of showing off those impressive drivers. Thanks for the help
Nameplate Position .. the latest...
Hi,
well as information on the position of these nameplates continues to pour in, it seems there is no real resolution. I have come across photos showing the nameplates positioned at the top as well as at the bottom of the grilles.
Although the top position is persuasive, being shown in a JBL brochure, I cannot believe that it is intended. The plate passes across the centres of the two tweeters. This is unorthodox to say the least. So, unless someone can provide evidence that this is an intended sound modification .. a crude type of lens for example.... I think I have to dismiss top mounting, even if it does look nice.
So, positioning at the bottom is not so difficult. The brackets that JBL provide do have to be moved (they provide brackets for top mounting for vertical use, and side mounting for horizontal use) to the bottom of the grille. They only questions then is to left or right justify , or to provide mirror image. Since none of these choices can affect the sound it is a purely cosmetic decision. The brackets control the height of the nameplate. There is about 18 cms. of movement possible in left-to-right positioning. Feel free to choose, as we seem to be leaving JBL's mounting decision anyway.
I am still open to persuasion on this... if there is compelling evidence to support the top position. Melanie thansk for the many answers and PMs on this subject.
George
More Detail.. And then Some!!
Hey 1audoihack, B-E-A-U-T-I-F-U-L pictures, and detail. Seems amazing that those foilcal's mount using those small holes in the 1/2" angle.. and like you said- provision to be able to place them L or R, even with the top baffle rotated... plenty of angle pieces to utilise.
Thanks Barry! ;)
DogBox