About to re-cone JBL 2225 to 2234/5 need advice

[Earl K]

Thanks for that.

Those kits seem to be real close to OEM JBL then , a good thing.

I notice I had a senior moment and changed a 1.25" measurement into a 4.25" measurement.

I'm going to correct that now.

Thanks!

[turnitdown]

Here, I hope, is a picture with the voice coil in the gap centered with a shim. I dry fit the spider on top of its perch. What's left is about 1/8-3/16 above the spider. This gives plenty of purchase for the cone and cap and it looks as though the coil itself is halfway in/halfway out of the gap. Thoughts?

[Earl K]

Thoughts??

If one looks at my pic of the OEM kit ( posted above ) the "collar" of the spider is pointing towards the voice-coil >> suggesting that you may have your spider flipped upside-down

Rob's pic shows similar ( and is clearer ).

[turnitdown]

The spider is in correctly. What your pictures suggest to me is that I need to put the spider on from the bottom of the voice coil so that the excess spider material folds down toward the coil. I going to try that right now. I'll be back.

[turnitdown]

I flipped the spider over and I now have the look illustrated in those two pictures. The relief of the former above the spider looks right also. If you all agree, I can begin to glue it up. That won't happen tonight however. I have another frame I need to clean and then glue them both up at the same time. I'm ready for a glass of wine. Thoughts on whether it's ready?

[Earl K]

The spider is in correctly. What your pictures suggest to me is that I need to put the spider on from the bottom of the voice coil so that the excess spider material folds down toward the coil. I going to try that right now. I'll be back.

Earl, you were right.
I flipped the spider over and I now have the look illustrated in those two pictures. The relief of the former above the spider looks right also. If you all agree, I can begin to glue it up. That won't happen tonight however. I have another frame I need to clean and then glue them both up at the same time. I'm ready for a glass of wine. Thoughts on whether it's ready?

I missed your most recent post.

Yes, I think you're ready to glue-up ( assuming things are also jiving with the GordonW info that I linked you to ).




PS: I also have here a generic 4" VC spider here ( from at least 20 years ago ) that has a very distinct collar ( it's un-used & the collar is not caused by the direction of application causing loose excess to bunchup ).

[turnitdown]

I missed your most recent post.Yes, I think you're ready to glue-up ( assuming things are also jiving with the GordonW info that I linked you to ).PS: I also have here a generic 4" VC spider here ( from at least 20 years ago ) that has a very distinct collar ( it's un-used & the collar is not caused by the direction of application causing loose excess to bunchup ).

You are correct again. Once I flipped the spider, the material naturally fell into place. Many, many thanks. The plan is to glue them up as 2234s sans dust cap, put them in a 4507 cabinet (5 cu. ft.) and test them before I decide to add the mass ring. I likely will add mass because they're going to work as subs for the 4612s. In essence, a B380 under them...biamped with electronic crossover.

[Earl K]

@RobH3606

Hi Rob,

If you still own it, could you please publish the static weight ( including dust-cap ) of your JBL 129H recone kit ( I'll assume that you have an applicable kitchen scale since you've dabbled in AquaPlas painting in the past ).

FYI, having the static weight will help those others who now rely on under-weight aftermarket recone kits ( and their own attempts to bring them up to spec by adding eBay-available AquaPlas ).

Thanks <> EarlK