Jbl crossovers

[toddalin]

JBL used them to help time align the mids with the other drivers on the studio monitors.
View attachment 2076164 View attachment 2076165

For dispersion, not time alignment. In fact the lens slows the signal as it passes through (because of the extra path length) and as the horn driver already sits well back behind the woofer and tweeter, it further hurts time alignment.

 

[toddalin]

I’m in Dallas area

Three Bennys plus shipping would get the pair but the input terminals are missing the "push part" and the input wires were previously soldered to the lower portions.

If you have two 8 ohm woofers wire them in series and these are what you want to use.

 

[powerman]

Hello Etanliano, great speakers. I am very familiar with the 4530 and 4520's and I have them. Before you jump the gun check out the DCR on the woofers to make sure they have not been reconed to a different impedance. The cone assemblies if original would be over 40 years old. JBL stopped making that series in 1976 the 2205B. If they are the correct Impedance I would wire them in parallel to net you a 8 ohm load and give you a sensitivity of about 99db/1/watt for the low freq. To be able to use the power handling ability of the 2 drivers at 150 watts each a JBL 3110A should be used as it is a 300 watt design and high freq equalization. This is a 800Hz crossover and helps the 2311/H93 horn out as it is not very long for the crossover wavelength. I have the 4530 as a 4 way and really like how they sound when you Biamp the low end at 110-120Hz. Here are some pictures of mine. Hope this helps[/ATTACH]

 

[Etaliano]

I did check the woofer terminal and reading 7.9 ohms for one cabinet and the other is 7.6 by the measurement they are wired parallel

 

[turboyam]

Hello Etanliano, great speakers. I am very familiar with the 4530 and 4520's and I have them. Before you jump the gun check out the DCR on the woofers to make sure they have not been reconed to a different impedance. The cone assemblies if original would be over 40 years old. JBL stopped making that series in 1976 the 2205B. If they are the correct Impedance I would wire them in parallel to net you a 8 ohm load and give you a sensitivity of about 99db/1/watt for the low freq. To be able to use the power handling ability of the 2 drivers at 150 watts each a JBL 3110A should be used as it is a 300 watt design and high freq equalization. This is a 800Hz crossover and helps the 2311/H93 horn out as it is not very long for the crossover wavelength. I have the 4530 as a 4 way and really like how they sound when you Biamp the low end at 110-120Hz. Here are some pictures of mine. Hope this helps[/ATTACH] View attachment 2076491 View attachment 2076490 View attachment 2076492

OOOHHHHHHHH!!! you tha man!!!. Here's my smaller army: custom 4530 with diy Audax PR170MO mid and Beyma CP21-F slot tweeters.

 

[Etaliano]

Man you have a lot of Big Jbl speakers I will look for JBL 3110A but those are two way crossover so I have to do some cap inline with the tweeters? Then connect the tweeters to the midrange is that how it suppose to connect?

 

[powerman]

Here is a link for making your own N7000/3105. Check out the wiring
https://audiokarma.org/forums/index.php?threads/new-tweeters-for-l200b.721312/page-2

 

[donprice]

I would go electronic with something like a miniDSP 2x4 on each side (or 1 4x10). Of course this assumes you have 6 channels of amplification to work with. Add a measuring mic (miniDSP UMIK-1 or similar) and software (REW or similar) to dial in the crossovers and correct the in-room response. A bit of a learning curve involved but not unreasonable.

 

[tarior]

OP, those are pretty awesome speaks. Enjoy!

 

[Etaliano]

 

[Etaliano]

Can I just add that circuit the one with circle to use for my tweeter 2405 16 ohm...by connecting to the input of the 3110A so I have 3 way? Please advice I’m still
Looking for 3110A no luck yet

 

[Riley Casey]

The capacitors inline with the mid and high frequency drivers are there to prevent 'accident's' like DC on the line. Presumably the previous owner triamped the speakers with an electronic crossover before the amplifiers. Thats an option you could explore as well and might actually be more appropriate than hunting and pecking your way thru designing and building custom crossovers. These speakers are not a design that JBL ever built a stock passive crossover for other than between the 2441 and the 075 super tweeter. Biamping between the 15s and the mid horn and then building a passive between the mid and the super tweeter might be good way to approach it. That would give you plenty of room to experiment with the low to mid crossover as the config you have is definitely non-standard.

I’m going to drive now I went and did a quick look and I see 2 capacitors in line of the tweeters 6 micro and 2 capacitors inline with the midrange 30 micro farads..