2235H recone

[Donald]

Surround disintegrated and apparently the VC bottomed in the slot. Could not move cone up/down by hand. Finally wiggled it out and some of the coil on the bottom was bent at right angles.

1. Suggestions on what fluid will make getting the glue holding the spider to the frame and what held the surround to the frame easier to remove?

2. Suggestions for a good cone kit? Even if I could find an OEM it would be expen$ive.

[1audiohack]

Hi Donald;

MEK will break down the surround adhesive and possibly the spider adhesive if it is not an “instant” adhesive. If MEK is unavaiable to you, fingernail polish remover is acetone based with an evaporation retarder and while not as mean as MEK it is your next best bet.

The instant’s are only dissolved with NitroMethane. In reality that leaves you with mechanical methods ie a sharp scraper and or an angle grinder.

I have no experience with non JBL conekits so I have no suggestions here.

Have fun! :)

Barry.

[Donald]

Even though I live in CA with its Prop 65 I do have a quart each of MEK and acetone. :)

[1audiohack]

You will die of cancer unless you cross a border before using it then.

[Donald]

I am looking at property in NV. :)

[Mr. Widget]

You will die of cancer unless you cross a border before using it then.:applaud:


Widget

[JuniorJBL]

You will die of cancer unless you cross a border before using it then.


Almost fell out of my chair with that one!! :rotfl:

[Donald]

OK, ordered from reconekits like the last time. But kit does not come with the mass ring. Before I start manhandling the old cone to get the ring out any suggestions?

I know I could leave it off to make a 2234H but the foil says 2235H. :) The Speaker Exchange wants $85 for the thing.

I write this after using acetone and MEK. Dremal with wire brush did better.

I am writing my will just in case.

[Donald]

Never mind. Glue used seemed to be brittle. Got a knife tip behind ring on each side of the split in the ring. Then applied a little pressure across the diameter with a long screwdriver and it popped out.

What glue should I use to reinstall? The spider/surround glue?

[1audiohack]

Hi Donald;

I have used both the Moyen glue that comes in the JBL kits and instant adhesives on the mass rings. I have had the best success with LocTite #410. The trick is getting enough in there to get a full circle bond without any getting anywhere near the gap inside the coil former.

Of you use an instant, use a “toughened” rubberized like 410 or Gorrilla brand. At least it’s not as brittle.

On the prep side I use some abrasive and scratch up the insied of the voice coil former where the mass ring will reside before the cone goes in the basket. Experiment on the old one to get a feel for what this takes. The real issue is that this will be just a mechanical bond and Kapton is slick.

Did you get a real JBL C8R2235 kit from them? If so, who stole the mass ring?

Barry.

[1audiohack]

Oh yeah, I use the Moyen on the surround and 410 on the spider and dust cap

I ALWAYS test operate the driver before the ring goes in and again before the cap goes on.

All the best!

[Donald]

Did not get a JBL kit. Given what they want for the mass ring I hate to think what they would want for a real JBL kit. Plus I took the wording on the site to mean they don’t like to sell OEM kits to us hackers.

The kit I did get came with Black Nitrile rubber cement. OK or should I get the 410?

[Ian Mackenzie]

That correct as it voids the warranty of the recone kit.

The problem in the overall market now is drivers are being re cycled on EBay with non OEM recones that may not have been installed correctly or worse in the wrong basket.

For the diy person who wants to re produce an authentic classic vintage jbl system per stock factory design sourcing authentic drivers had become problematic.

They won’t always know if the seller says jbl 2235 for sale.

I have observed this situation on projects in the past 2 years and it’s a nightmare when you’re got the job of cleaning up a project.

The system just won’t perform as desired and they won’t know why?

It fucks the whole hobby for everyone.

So if you decide to sell your drivers at some point sell it as a non oem recone

Member Edgewound is the expert on driver re builds

This has been discussed in numerous threads previously

[Donald]

Driver is from my B380. Just want it working again. But I will attach a note to the unit.

[1audiohack]

Driver is from my B380. Just want it working again...

That makes it easier for sure. Not like it’s a studio monitor that a slight change in voice would be an isssue.

Real JBL kits for those are about $205. Mass rings aught to be about $8.50, $85‘s a joke.

[grumpy]

lol, or epoxy and some solder. (mass rings)
If the voicecoil gets to 600F there will be worse issues to deal with.

[cooky1257]

...but the foil says 2235, I'm still laughing. It isn't a 2235, mass ring or not.

[ivica]

Surround disintegrated and apparently the VC bottomed in the slot. Could not move cone up/down by hand. Finally wiggled it out and some of the coil on the bottom was bent at right angles.

1. Suggestions on what fluid will make getting the glue holding the spider to the frame and what held the surround to the frame easier to remove?

2. Suggestions for a good cone kit? Even if I could find an OEM it would be expen$ive.

Hi

Why not use old mas ring (35gr) or make it from aluminum, cooper, solder-wire.....

1. Voice Coil 2235H:
https://www.ebay.com/itm/JBL-2235H-2230H-VOICE-COIL-SPEAKER-PARTS-REPAIR/291906473690?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D41375%26meid%3D697d351644e045 7cb826028de2098bbe%26pid%3D100033%26rk%3D1%26rkt%3 D2%26sd%3D291906473690&_trksid=p2045573.c100033.m2042
(https://www.ebay.com/itm/JBL-2235H-2230H-VOICE-COIL-SPEAKER-PARTS-REPAIR/291906473690?_trkparms=aid%3D111001%26algo%3DREC.S EED%26ao%3D1%26asc%3D41375%26meid%3D697d351644e045 7cb826028de2098bbe%26pid%3D100033%26rk%3D1%26rkt%3 D2%26sd%3D291906473690&_trksid=p2045573.c100033.m2042)
or
http://reconekits.com/jbl2204-22408ohmvoicecoil-1.aspx

2.re-foam kit:
https://www.ebay.com/itm/172504104168?ul_noapp=true

regards
ivica

[Donald]

...but the foil says 2235, I'm still laughing. It isn't a 2235, mass ring or not.

Please explain.

[Donald]

How long should I wait until I crank this thing up?

Let spider glue cure for a day.
Let foam glue cure for a day.
Let mass ring glue cure for a day.
Let dome glue cure for a day.

So spider glue has now set for 4-5 days.

Found an OC Speaker label on it but no date. I put my own label with date and non-oem disclosure on it.

[1audiohack]

I small signal test before I even solder the tinsels and put them to use the next day.

Barry.

[cooky1257]

Please explain.

Using an after market cone and worrying about a mass ring because it says 2235 on the foil- the use of the former completely destroys any authenticity in the latter.

[dubkarma]

Real JBL kits for those are about $205. Mass rings aught to be about $8.50, $85‘s a joke.

Can anyone suggest where to obtain the 2235 mass rings?

I'm getting a pair of 2225s reconed as 2235s, but my recone guy tells me that the cone kits do not include the mass ring.

He also suggested he could fashion a 35 gram equivalent from copper wire and install that, but I'm not sure that's the way to go.

Any tips appreciated!

[Earl K]

Can anyone suggest where to obtain the 2235 mass rings?

I'm getting a pair of 2225s reconed as 2235s, but my recone guy tells me that the cone kits do not include the mass ring.

He also suggested he could fashion a 35 gram equivalent from copper wire and install that, but I'm not sure that's the way to go.

Any tips appreciated!

I'm pretty sure that authentic JBL recone kits still include the mass ring .

You might want to query your reconer about just what he's actually using .


:)