Find great deals for Vintage Single JBL N Speaker Crossover Network. Shop with confidence on eBay!. Hello Friends, I am about to order replacement caps and coil for the JBL N crossover network. I would like to know if the Solen caps are. Omar Perez, David A Ricker and 3 others like this. Comments. Other Albums. ‘ Underneath view, tone board and faceplate removed. Very clean chassis!’ ‘ Output.
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Page 1 of 2 1 n4200 Last Jump to page: Results 1 to 15 of The N Revealed I am currently restoring my old systems. So, I thought I would take the extra time to document a few things.
Since, the L-Pads were in really bad shape, I decided I would open up the boxes and inspect everything.
To open the boxes, the heads nbl 4 rivets were very carefully drilled off. This allowed the back covers to be removed. Upon inspection, I turned up a few surprises. First, I was surprised by just how small the coils were in size, with only 20 gauge wire. Second, the coils had a different part number, then what was described in N circuit schematic.
So, I have revised the N schematic below to show the differences that I found.
In testing the N crossovers, the coils had inductance values of 1. Considering that the caps are 36 year old, I am pleasantly surprised by how well they have held up.
The N Overhauled Jbp, I am turning my old system over to my nephew, who is not very knowledgeable when it comes to electronics.
I decided to replace a lot of the components. This would jhl the old system fairly trouble free for a really long time.
Part Express had all of the parts that I needed.
And I decided to upgrade the JBL coils with 1. After completely overhauling one of the crossovers, I did a side by side comparison. The jnl with the new components did sound a lot better. The s sounded slightly cleaner with the bypassed Solens. I really think that the JBL coils are saturating and creating some distortion.
JBL N2400 Crossovers for D130 and 075 Completely Serviced Excellent!
Finally, to reinstall the original back cover, I first drilled out the old rivets and then tapped the holes to accept screws. Thanks for sharing with us There are a few vintage fans amongst us who still play with the vintage older 2-way n200.
JBL Pro for home use! Nice Job Great pictures, too. Right up my alley.
JBL N2400 network rebuild question
Hey, thats really cool. Your nephew should indeed be very happy with his new JBL,s and quite grateful to have such a super uncle! Very nice reveal indeed Baron! Thanks a lot for the detailed jbo and great photos. Thanks, Baron You inspired me to bid on and win a couple JBL N crossovers on e-bay which I then took apart and replaced the capacitors and resistors did not replace inductor as you did and put them back together.
I used “pop” rivets worked great instead of threading the box.
Vintage Single JBL N Speaker Crossover Network | eBay
My speaker system consists of D woofers and LE20 tweeters. I made one small change to the crossovers – I used a 4 ohm series resistor and an 8 ohm parallel resistor instead of two fives. I wanted a little more volume to my tweeter. I don’t believe the LE20s are as efficient as the s which I hope to get someday.
J2400 the fader control, I have enough range to make the adjustment. Thanks for the inspiration to jump in and modify a JBL crossover. Well, I can see that this is your first posting here. So, welcome to the LH forums. Originally Posted by Baron Since, I am turning my old system over to my nephew, who is not very knowledgeable when m2400 comes to electronics. Photo of wiring diagram It appears from the photo of the upgrade of the N crossover that the resister bridge is not wired per the the original JBL schematic.
This would actually work and approximate the protective additional resistance that JBL wanted to use to protect the First, is my observation correct?
Second, was this done on purpose and, if so, why? Otherwise, a fantastic job of documenting this N upgrade, which I am in the process of implementing myself. Hi Jgl The pictures may not look right to you. But, I can assure you that the networks were rebuilt correctly to JBL specs and that they follow the schematic that I posted perfectly. The purpose ibl the two 5 ohm resistors is to create a This limits the maximum setting of the variable L-PAD network to prevent damage to the driver.
I suspect that before JBL added the two 5 ohm resistors, they had service issues with careless system users. Hi Walt I just had a thought as to why you might think that the L-Pads pictured were not wired up correctly.
In the re-build, I used 15 watt Dayton L-Pads. So, if you are going to use Dayton L-Pads, then follow their instructions and schematic that comes with their pads. Otherwise, you may not get them wired correctly in the network. Schematic Photo Baron, The question was not about the L-Pad I used the generic Parts-Express oneonly the two 5 ohm resistor bridge itself and where the ends of the bridge connect to regarding the rest of the circuit. I am trying to attach a JPG showing what confused me.
I was sure I had it wrong but still wanted to ask — it just looked like the end-points of the bridge n24000 the schematic were twisted together in the photo. Hi Walt The picture you posted has the coil covering a solder lug terminal. I magnified the pervious photo where the coil has not been installed yet.
I have highlighted the same wire that you are talking about with red arrows and the other connections are color coded in blue, green and cyan. And I have highlighted the same connection points on the schematic. I am not sure if this helps clears things up or not. All times are GMT The time now is Extra Tabs by vBulletin Hispano.