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kl194
11-29-2009, 02:41 AM
Hi there!I have a jbl 4560 cab with two d130's and also two jbl 2470 compression drivers.I need some help in order to find the proper HORN for the 2470.I have in mind some Jabo horns (the KH-75) BUT I'M NOT 100% sure.
Thanks Kostas.:banghead:
jcrobso
11-30-2009, 09:10 AM
Hi there!I have a jbl 4560 cab with two d130's and also two jbl 2470 compression drivers.I need some help in order to find the proper HORN for the 2470.I have in mind some Jabo horns (the KH-75) BUT I'M NOT 100% sure.
Thanks Kostas.:banghead:
Is this for a PA system? Any of the newer JBL horns for 1" drivers would work. Beyma horns would work! Beyma is made in Spain.
I would use this horn is you can't get a JBL horn.
http://www.usspeaker.com/beyma%20TD-250-1.htm
kl194
11-30-2009, 09:25 AM
Is this for a PA system? Any of the newer JBL horns for 1" drivers would work. Beyma horns would work! Beyma is made in Spain.
I would use this horn is you can't get a JBL horn.
http://www.usspeaker.com/beyma%20TD-250-1.htm

No.This is for home use.I want best sound that these 2470 can produce.
Thanks Kostas.
jcrobso
11-30-2009, 10:04 AM
I have used the Beyma horn and is very good horn. Just some FYI.
http://www.jblpro.com/pub/obsolete/2470.pdf
The 2470 has a phenolic diaphragm and HF response is only up to about 8Khz.
You will need a tweeter about 7Khz. You could use 2420 diaphragm for better HF response. Also the bass below 100Hz on 4560 cabinet is on the poor side. You may also want to get a sub to use with them.
kl194
11-30-2009, 10:47 AM
Thanks for the reply.But the 2470 goes up to 12k not to 8k.I used to have a pair of avantgarde's uno.And the impressions were very good.And because the Jabo Horns look about the same as the avantgarde's.I am thinking that will also sound good.....what's your idea?
jcrobso
11-30-2009, 10:59 AM
Thanks for the reply.But the 2470 goes up to 12k not to 8k.I used to have a pair of avantgarde's uno.And the impressions were very good.And because the Jabo Horns look about the same as the avantgarde's.I am thinking that will also sound good.....what's your idea?

They are not readily available in Chicago Ill, USA.
kl194
11-30-2009, 11:02 AM
You really don't know what you're missing.Although i will take the risk and put the jabo's.
jcrobso
11-30-2009, 11:21 AM
You really don't know what you're missing.Although i will take the risk and put the jabo's.

I mostly do PA with my 4560s, I will try to post a picture of my setup.
Eaulive
11-30-2009, 01:04 PM
I mostly do PA with my 4560s, I will try to post a picture of my setup.

I will have to get a bigger screen then :D
jcrobso
11-30-2009, 01:57 PM
I will have to get a bigger screen then :D
That way they will fit on a standard screen, sorry!:(
kl194
12-01-2009, 04:40 AM
Hi,there i bought the Jabo horns kh-75.!!Now the problem is the crossover :)
Does anybody knows what crossover i should make?
Thanks again,Kostas.
Eaulive
12-01-2009, 05:51 AM
That way they will fit on a standard screen, sorry!:(

Argh, they're 4560s, they'll fit :D
I was thinking about 4550s, since the original poster says he has a JBL cab with two D130, I read 4560 but the mental image of the double front loaded horn took over :D
kl194
12-01-2009, 06:30 AM
Yes,the cabs are 4560 with d130.!!!!
Eaulive
12-01-2009, 07:16 AM
Yes,the cabs are 4560 with d130.!!!!

I know that but you opening sentence was confusing.

I have a jbl 4560 cab with two d130's
jcrobso
12-01-2009, 02:39 PM
Hi,there i bought the Jabo horns kh-75.!!Now the problem is the crossover :)
Does anybody knows what crossover i should make?
Thanks again,Kostas.

If the horn has a 500Hz cut off, 800Hz would be the place to start, 1200Hz would also be a good choice.
kl194
12-02-2009, 02:53 AM
Ok,the jbl n1200 crossover maybe is a good idea?
kl194
12-02-2009, 06:08 AM
Or the JBL 3120a pro.
Earl K
12-02-2009, 06:39 AM
Kostas,

I looked around for info on the Jabo KH-75 and found the following pics from an eBay auction .

Is this the size of horn that you bought ?

If so , the flare cutoff of this large horn is 200 hz / meaning that it'll easily support a 500 hz crossover point (but only if the driver can also go this low ) .

From the looks of the graph that I have included for the 2470, it appears 750 hz is a reasonable crossover point to start .

No matter which crossover point is chosen you could build yourself a custom crossover from available online parts ( it'll be cheaper ) .

If you must buy something ( because you can't design a crossover yourself ) then look for a pair of older 3110 crossovers ( or 3110a ) which is designed for 800 hz ( & coincidentaly , components as old as yours ) .

For a fuller range sound / I think you're going to need a tweeter ( as already mentioned ) and maybe another woofer underneath those D130 loaded 4560s .

<> cheers