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Thread: Which horn on JBL 4560?

  1. #1
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    Which horn on JBL 4560?

    Happy new year to everyone! Well im thinking of trying a new horn on my JBL 4560 instead of my 2390 horn/lens i use now. The problem is that any crossover point upper the 500hz make the speaker system to not sound correct. At 800hz the blend of the mid frequencies with the lows is not good and you can hear that. So i need a horn that goes down to 500hz . I got the 3115a , 3110a and 3152 crossovers (also some active ones). On woofers i got the 2220 , 2205, e145, k140 , and k130. On horns i got the 2355 (total crap), the 2380 (smooth down to 500hz with great blend with the lows but missing the detail of the 2390) , and the 2390 lenses that most of the time i use the 2309 horn only cause i really like its attach and uncolored sound. I was considering the 2397 smith horn but i know that its loading is limited to 800hz only :/. Any other ideas? Regards!

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    With the 2309
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    Last edited by Mr. Widget; 01-05-2021 at 08:19 AM.

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    The 2350 radial horn was often used with the 4560. Makes life pretty hard on the 2440 / 41 drivers often used with them but that's how it goes when using a speaker cabinet designed for 1950s movie theaters. Not sure I'd characterize the 2355 as total crap just not the right tool for the job of listening in a living room. Could say the same thing about the 4560.

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    Senior Member Eaulive's Avatar
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    I guess the 2380a is a good match with the 2220, but you'll need some kind of EQ to account for the decreasing HF response due to the CD design.

    That being said, I'm no expert and my experience with horns is limited.
    My avatar: 4520 loaded with 2225H on E140 frames,
    1x 2202H on custom front loaded horn, 2x 2426 on 2370.

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    Quote Originally Posted by Riley Casey View Post
    The 2350 radial horn was often used with the 4560. Makes life pretty hard on the 2440 / 41 drivers often used with them but that's how it goes when using a speaker cabinet designed for 1950s movie theaters. Not sure I'd characterize the 2355 as total crap just not the right tool for the job of listening in a living room. Could say the same thing about the 4560.
    Indeed already searching some better JBL cabinets although i was searching this original pair of 4560 for almost a decate so i cant let them go that easy. I was considering the 2386 horns. Way less distortion from the mouth of the horn and horn loading down to 400hz but still the 2397 are stacked to my head. I wonder if anyone here got them for an opinion about them

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    Senior Member grumpy's Avatar
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    2360 w/ appropriate horn contour/EQ. Sounded awesome. EQ’d low end (a bit... I’m not a basshead or subs would have been necessary). Had 2226 w/spacers in the 4560s. I believe I had SL dias in 2446 bodies. Did not use a tweeter.

    Takes a bit of willpower to not just keep turning it up.

    Ultimately, it was too tempting and I value my hearing (and at the time, my kids were learning to use the stereo). Not particularly flat, but very entertaining and enticing.

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    I hadn't really connected your forum nickname to your post before but if you really want a speaker system that sounds like a live sound system from a mid 1970s R&B concert in the USA your 4560 cabinet with a 2220 driver and a 2350 horn with a 2440 on top crossed over at 800 hz with a 12db per octave electronic crossover would be exactly what the crowd would have been listening to.

    Quote Originally Posted by retro soulman View Post
    Indeed already searching some better JBL cabinets although i was searching this original pair of 4560 for almost a decate so i cant let them go that easy. I was considering the 2386 horns. Way less distortion from the mouth of the horn and horn loading down to 400hz but still the 2397 are stacked to my head. I wonder if anyone here got them for an opinion about them

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    Senior Member grumpy's Avatar
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    Haha, from like 50+ feet away (please).

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    Depending on when the cabinets were manufactured, the top panel comes off where a 2345 or 2370 horn bolts right in. The 2370 is a hair too big to fit in the opening of the older cabinet version.

    Check the 4662/3. 4663 has the 2405 added to extend the top end.

    I have my 4560 cabs loaded with K140 and 2345 horns with 2470 drivers with ti 'phragms.

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    Quote Originally Posted by short_circutz2 View Post
    Depending on when the cabinets were manufactured, the top panel comes off where a 2345 or 2370 horn bolts right in. The 2370 is a hair too big to fit in the opening of the older cabinet version.

    Check the 4662/3. 4663 has the 2405 added to extend the top end.

    I have my 4560 cabs loaded with K140 and 2345 horns with 2470 drivers with ti 'phragms.

    Both are 4560a version but indeed the one cabinets opening don't fit the 2370 horn and i was really wondering why! Lol
    Still i prefer 2" horn drivers cause i like the lower crossover points. What a driver can reproduce at 500hz cant a paper cone reproduce in that accuracy.

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    Quote Originally Posted by grumpy View Post
    2360 w/ appropriate horn contour/EQ. Sounded awesome. EQ’d low end (a bit... I’m not a basshead or subs would have been necessary). Had 2226 w/spacers in the 4560s. I believe I had SL dias in 2446 bodies. Did not use a tweeter.

    Takes a bit of willpower to not just keep turning it up.

    Ultimately, it was too tempting and I value my hearing (and at the time, my kids were learning to use the stereo). Not particularly flat, but very entertaining and enticing.
    Had the 2360 horns. Never liked their sound when crossed under 1k hz.

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    Senior Member jbl4ever's Avatar
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    If you can try some 2382’s, I think you will like that better

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    Quote Originally Posted by jbl4ever View Post
    If you can try some 2382’s, I think you will like that better
    Oh that tight slot on the horn looks nasty! I bet it effects bad in sound :/

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    Senior Member RMC's Avatar
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    Hi retro soulman,

    RE "The problem is that any crossover point upper the 500hz make the speaker system to not sound correct. At 800hz the blend of the mid frequencies with the lows is not good and you can hear that. So i need a horn that goes down to 500hz."

    Following a troubleshooting pattern from simpler to more complex... and trying to make good with what you have.

    Assuming the driver reversed polarity issue was taken care of for a 12 db/oct crossover?

    On your pic a vent opening, for vented rear chamber, shows bare plywood inside on back panel. LF driver low mid reflections in cab due to lack of damping material?

    Moreover have you tried with some other LF drivers you have? e.g. K130, K140

    Before jumping to conclusion about the MF horn, since you have active crossovers, hopefully with 24 db/oct, have you tested it with this? Considering these cabs provide pretty high "shelving" type response in the low mid, problem experienced might also be one of too much LF/MF overlap around xo freq. A steeper xo might help cleaning the sound?

    BTW the initial 4662: 4560 with K130, 2461, 2345 and 3110. Later 4662A: 4560, E140, 2425, 2370 and 3110A (later with 2426). This might give you some additional ideas. Regards,

    Richard

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    Quote Originally Posted by RMC View Post
    Hi retro soulman,

    RE "The problem is that any crossover point upper the 500hz make the speaker system to not sound correct. At 800hz the blend of the mid frequencies with the lows is not good and you can hear that. So i need a horn that goes down to 500hz."

    Following a troubleshooting pattern from simpler to more complex... and trying to make good with what you have.

    Assuming the driver reversed polarity issue was taken care of for a 12 db/oct crossover?

    On your pic a vent opening, for vented rear chamber, shows bare plywood inside on back panel. LF driver low mid reflections in cab due to lack of damping material?

    Moreover have you tried with some other LF drivers you have? e.g. K130, K140

    Before jumping to conclusion about the MF horn, since you have active crossovers, hopefully with 24 db/oct, have you tested it with this? Considering these cabs provide pretty high "shelving" type response in the low mid, problem experienced might also be one of too much LF/MF overlap around xo freq. A steeper xo might help cleaning the sound?

    BTW the initial 4662: 4560 with K130, 2461, 2345 and 3110. Later 4662A: 4560, E140, 2425, 2370 and 3110A (later with 2426). This might give you some additional ideas. Regards,



    Richard

    With the bss 24db slope crossover the "broblem" is more clear. With the smooth 12db slope is not that huge. I believe the problem with these cabinets is the large distance between the horn and the woofer. With the 4530 i had no prb at all at 800hz or even higher crossover points !

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