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JBL 2269H 18" Differential Drive Discussion

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Discussion of JBL's most powerful differential drive woofer should go here. 

This is an oldie but a goody. It's an expensive bugger like most of the woofers I test these days but it is still a cut above most of the 18" units on the market.  I always wanted to test one of these just to see how good it is. I don't expect many people to go out and buy these for a project at those prices but it is still a common driver to see in the industry in a lot of JBL's top Pro subs. I figure giving it a run through here should help give insight into the capabilities of the various JBL subs using the 2269H. It doesn't have the crazy efficiency and motor force of the drivers coming out in the last 5 years, but it does seem to offer quite a bit of power handling and raw displacement capability. It's too bad you never see these on the second hand market for a few hundred dollars like you can pick up other legacy JBL units for. It might be an option then. The retail price is a killer. It really doesn't seem like these would be that expensive to produce either with JBL's economy of scale and having been around for so long. 

 

https://data-bass.com/#/drivers/5cd9d5e8bd4b990004557d17

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Awe.. the 2269. This driver has had so much enigma behind it since it first game out, esp. because you couldn't buy it outside of the incredibly expensive Vertec stuff or the god damn Everest itself! That awesome to get the results here. Good work Josh! This was the target when making the Pro 5100.

 

 

 

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Very nice!! I love that driver. This year JBL launched a new sub in the VTX line with a new driver and they say it is a big Improvement, +4 dB at 80 compared to 2269H and better power handling, 1400 W instead of 1200W. 

It seems that they are not using the AES standard of power rating, instead they use Klippel measurements. A 2kw driver AES like 21SW152 can take around 1.1 kW nominal based on RMS voltage in the nominal Impedance on the Klippel LSI reports, with 4-5 dB power compression. This is probably the case with these drivers also.

Now it's time for the new NTLW5000 models ;) . I have a pair of 21s with 4 ohm coils , first of them ever. The motor force is over 200 , coils are 2 of 38 mm each minimum from my calculations and verifications, copper, wire gauge is 0.6 mm, magnetic gaps are 12 mm . The 2 coils are 8 ohms each and linked in parallel. The spider suspension material seems pretty much the same as that from this JBL driver.

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Interesting. Got a model # or a link to the sub with the new JBL driver? I have not heard about this. 

Did you finally get those 5000's? We still have nothing over here.

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Looking at the cutout of the 2269, it seems that the design for NTLW5000 driver is pretty much the same. The pole pieces are the same shape, the magnet inside is single 2 cm thick ring of about 4" external diameter with a center whole inside of 2 cm, meaning about 1.1 kg of neo.

The external metal ring is also closing the magnetic circuit, but not having a similar heat sink, it might not dissipate the heat as well. 

All my tests show that the driver behaves absolutely stunning up to 50 mm peak to peak, after which it starts to become noisy. Klippel results show flat BL until +-10 mm, similar to that of a split coil design, but then it dropps with a very low slope, remaining at 75% at +-17.5 mm.

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Thanks for linking to the JBL. New driver name is 2288H. I was unable to find much on it yet. My gut tells me it may have similar excursion as the 2269H but slightly improved power handling and higher efficiency. Looks like it is only used in the VTX B18 at this point. I really dig the port flaring on that cabinet. It wouldn't be too hard to do something similar on a 3D printer. I'm assuming they are using a quarter section of very large pipe for the ports.

Congrats on the 5000's I still plan to get ahold of one at some point.

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The ports are the corner iteration from their own 2*15" version, the VTX V25. I've seen that one in real life and I've heard another version of the VTX with single 18" driver, but with their nice dual flared tubes and they really really work way better than a similar surface square vent.

I bet they went for a higher motor force , higher moving mass with lower Q, increasing sensitivity on the upper end. 

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