L-200B modified = L-300
Hi.
I have a pair of L-200B and I would like changed ( modified ) in L-300, I have a pair of 2405H and i whish to use them with a internal passive crossover.
anybody have done that modification if yes how was the result good or bad
ps.... Excuse me,........ I barely speak English , i use translate on net french/ english.......
tanks
Last edited by alnico; 09-15-2004 at 07:14 PM.
Get a couple of N8000 or 3106 networks and follow the instructions elsewhere on this forum; It is as close as You can easily get to a L300.
But anybody have done that modification if yes how was the result good or bad ????
Also Search under 4331 (two-way) and 4333 (three-way). These are the Pro versions of your project.
I'll search, too...
*****
http://audioheritage.csdco.com/vbull...ight=4333+2405
and maybe the long stale "Entwistle" thread...
http://audioheritage.csdco.com/vbull...ight=entwistle
Last edited by boputnam; 09-16-2004 at 02:30 PM.
bo
"Indeed, not!!"
I also have a pair of L200b speakers and wonder if an external active crossover could be used in place of the L300/4333b crossover? The active external crossover I have in mind is the a/d/s C2000. I used the a/d/s C2000 in a biamp setup with a/d/s 1530 monitors and it can also be used with non a/d/s speakers at selectable crossover points. From what I have read it sounds like they could be biamped if upgraded to L300/4333b. Appreciate all the excellent advice I have received so far. I came home to JBL after many years, some of my first speakers were JBL L19 and 4311b. Rich.
The short answer...
Adding the 2405H as described will bring these 2 ways to life. You will be very happy.
Ken
The stock L200B crossover has a minor HF boost built in to compensate for the falling HF of the LE85. Yes you can biamp them but you will need to introduce some form of HF compensation if you want to continue using them as a two way.Originally posted by majick47
I also have a pair of L200b speakers and wonder if an external active crossover could be used in place of the L300/4333b crossover?
From what I have read it sounds like they could be biamped if upgraded to L300/4333b.
The 3133A crossover (4333A/B) does have a provision for biamping at 800Hz. It requires a crossover designed to be set to that frequency.
If you decide to try to create a L300, be advised that even after you add the 077/2405 and appropriate crossover you will still have the short 1200Hz H91 horn and not the preferred 800Hz H92. Unfortunately the H92 will not fit in the L200 cabinet.
You could add the 2121 or 2122 in a .5 cu ft cab up top and a 2405 and 3143 crossover and you will have an odd looking but sonically superior speaker to the L300. It will be approximately equivalent to the 4343.
As far as the ADS C2000 is concerned, while it was specifically designed for certain ADS speakers, there is a provision for customizing it for other speakers. If you have the original documentation on how to make the modification and are knowledgeable, you could give it a try.
Widget
Last edited by Mr. Widget; 09-16-2004 at 10:57 PM.
If you decide to try to create a L300, be advised that even after you add the 077/2405 and appropriate crossover you will still have the short 1200Hz H91 horn and not the preferred 800Hz H92. Unfortunately the H92 will not fit in the L200 cabinet.
My L-200B use H91 with original spec crossover frequency 800 HZ....and L-300 use H92 with original spec crossover frequency is 800 HZ - 8500 HZ ..........and 4333 is 800 HZ - 8500 HZ .
then I can use a passif crossover 3114(L-300) or 3133 (4333) ??
L-300= 800hz-8500hz
4333= 800hz - 8500hz
Last edited by alnico; 09-17-2004 at 09:45 AM.
Here are three more passive networks you can try in addition to Alex Lancaster's suggestion.
The 3133 network as used in the 4333
The N333 network as used in the L300
The LX300 network as used in the S300 (Good luck finding one of these!)
The 3114 is used in the 4315 Studio Monitor.
You can use the H91 (short horn) at 800Hz as JBL did in the L200B but it is a compromise. That horn works better at 1200Hz. In fact so does the driver. That is one of the main reasons that the 4343 and 4345 are superior to the 4333/L300. Using the LE85/2420 above 1200Hz really improves it's sound.
The original L200 crossed over at 1200Hz with the H91 horn, but the woofer was a compromise... I guess you just have to pick your compromise.
Widget
Last edited by Mr. Widget; 09-17-2004 at 09:57 AM.
which internal passive crossover with a frequency of 1200HZ and 8500hz ????
tanks
The one you already have plus the ones Alex suggested above.
N200B HF output goes to N8000/3106 input
N8000/3106 LF output goes to the LE85 and the HF output goes to the 2405
I don't know how well these posts translate using software, maybe our French/English speakers can translate for you.Originally posted by alnico
I barely speak English , i use translate on net french/ english.......
tanks
Last edited by 4313B; 09-17-2004 at 10:51 AM.
He Alnico, if you need some translation help I can help you because I'm French from Paris living in California.
Si tu as besoin d'aide en anglais je peux t'aider a traduire car j'habite en Californie.
Fred.
Excellent! Thank you!
Tanks
Last edited by alnico; 09-17-2004 at 11:59 AM.
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