Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: 2235 white recone kit

  1. #1
    Member
    Join Date
    Apr 2017
    Location
    Uk
    Posts
    54

    2235 white recone kit

    I have just come across something very interesting and was hoping for some thoughts from the more experienced members of this forum. I have some 2225 baskets that I had planned on reconing as 2235. Obviously JBL kits are NLA so was planning on going down the aftermarket route. I've reconed 2 LE15as with aftermarket kits and they seem very good quality to me. From what I've been told there is a supplier in Arizona that has correct reproduced voice coils, so someone somewhere is remaking them to JBL spec. That's all fine, I planned to do that, until, I came across this!

    It looks to me to be a very good quality recone kit, as its from Japan and those guys over there seriously mean business when it comes to their JBL. The thing that stood out for me is that the cone is white!! I don't know if this is aquaplas, or the paper pulp is white, or any information really. I've sent a message through the ebay system but no reply as yet. The detailed technical information gives me confidence that it will be up to JBL original spec, or even better knowing the Japanese. Also a bonus is they say the mass ring is already attached, on the other aftermarket kits the mass ring is not included.

    I just wanted to ask if anyone could tell me whether this would work for my 1.2T 2225 frames. The ebay listing says 2231/2235, but most of the info seems to be for the 2231. As far as I can tell the only difference between the 2 is the spider?

    I think I will get a pair, because they are also quite cheap and I can't see it being worse quality than the other aftermarket kits out there. As far as I can find, the only 15 inch driver that was ever white was the 2230A but I can't find any info about them other than a few pictures. So I am wondering, is there any reason they have produced a white cone other than to complete the look of an old style 4350?

    ebay link, but will add pictures if links are not allowed

    https://www.ebay.co.uk/itm/JBL-2231-...s/293351737141

    Name:  s-l1600 copy.jpg
Views: 225
Size:  42.2 KB
    Name:  s-l16001.jpg
Views: 223
Size:  45.4 KB
    Name:  s-l16002.jpg
Views: 223
Size:  31.2 KB
    Name:  s-l16003.jpg
Views: 219
Size:  34.7 KB
    Name:  s-l16004.jpg
Views: 224
Size:  38.3 KB

  2. #2
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    10,172
    The original woofer of this series was the 2230A. It had a massive coating of white aquaplas to increase the cone mass to the desired level. I donít remember why, (to reduce distortion or failures) but to improve performance the 2231A was developed. It did not have the heavy aquaplas coating, instead JBLís designers added a mass ring to the base of the cone. The next change was the introduction of the ferrite magnets to replace the alnico magnets that had become unobtainable in the late Ď70s. This was the 2231H.

    I was not personally thrilled with the original H versions that JBL rolled out, and perhaps JBL was not as they then introduced the 2235H. The 2231H and 2235H both had mass rings as the original 2231A had.

    That is a bit of the history. Now, the question about buying these white aftermarket kits? I would pass, but I am biased in favor of quality over bling or ďitís not as good, but it was cheapĒ.


    Widget

  3. #3
    Senior Member
    Join Date
    Jul 2003
    Location
    Orange County, CA
    Posts
    3,234
    Back in the 70s at the swap meet my brother picked up an Altec 605 in a utility cabinet and a separate LE15A that was white due to a heavy application of ??? coating. The coating had a "sand" texture to it.

  4. #4
    Member
    Join Date
    Apr 2017
    Location
    Uk
    Posts
    54
    Quote Originally Posted by Mr. Widget View Post
    That is a bit of the history. Now, the question about buying these white aftermarket kits? I would pass, but I am biased in favor of quality over bling or ďitís not as good, but it was cheapĒ.
    What makes you think that this kit is not good quality? OEM JBL C8R2235 kits are NLA, so what other option do I have? If I could find the technical specs of all the different parts of an OEM cone kit, I could compare to this as they have provided all of their technical specs. But I can't seem to find details on the weight and dimensions of the OEM cone, voice coil, spider etc. Its much better than the other kits out there that just say, '2235 aftermarket kit' and don't provide any technical details whatsoever. The fact that it gives much more information, plus when you factor in the mass ring included its cheaper than the other aftermarket kits...is just a bonus really. Also I'm in the UK so shipping costs are actually cheaper than what it would be to get an aftermarket kit from the states.

    From your history it seems like the white aquaplas was replaced with the mass ring, this makes sense. I guess then the only reason they are doing this is to have the look, since they provide a voice coil with a mass ring already in place.

  5. #5
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    10,172
    Quote Originally Posted by toddalin View Post
    Back in the 70s at the swap meet my brother picked up an Altec 605 in a utility cabinet and a separate LE15A that was white due to a heavy application of ??? coating. The coating had a "sand" texture to it.
    I would guess someone modified that LE15A to perform subwoofer duty.

    I donít believe JBL ever produced an LE15A with that treatment.


    Widget

  6. #6
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    10,172
    Quote Originally Posted by budney View Post
    What makes you think that this kit is not good quality?
    I agree that it is a good thing that they’re providing their specs, but the fact that they are offering it in white makes me fear the worst.

    I guess you can always buy one and install it, measure the TS parameters, and see how close it is to the real deal.


    Widget

  7. #7
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    2,771
    I just (Jan 2020) bought four C8R2235ís from JBL. I can check in the morning to see what they have on the shelf if you like. I donít think these are NLA, yet.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  8. #8
    Senior Member
    Join Date
    Feb 2009
    Location
    annapolis, md usa
    Posts
    455
    Quote Originally Posted by 1audiohack View Post
    I just (Jan 2020) bought four C8R2235ís from JBL. I can check in the morning to see what they have on the shelf if you like. I donít think these are NLA, yet.

    Barry.
    Thanks Barry, the OPs statement they were NLA is the first I've heard about it.

  9. #9
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    Australia
    Posts
    7,266
    Hi Budney,

    The only way to validate if this is an equivalent kit is to buy it and have tested with a woofer tester.

    Stick with the facts.

    I would show the kit to a Jbl reconer locally if you want further validation. The voice coil construction is important for the same power rating and reliability. However if validation is not overly important to you buy and try. The cone colour could be a pigment or a coating so that needs to be confirmed. But hey someone is making them and itís worth a look. There are numerous drivers made in Japan so donít be put off by that. These 2235 style kits are possibly made by an OEM driver manufacturer. The actual components the make up a driver can however be sourced from a number of loudspeaker industry suppliers globally. Things like the surrounds, spiders and other components are in fact made by industry suppliers. Jbl kept to the 2235 design for a number of years and held the QC with a reconer agreement. However there are no religious rights on drivers from any manufacturer. The paper pulp mix and use of specific fibres does account for the way the structure behaves in operation.

    Jbl did not make the cones for all their drivers for example. The cones in Aftermarket cone kits may well be from the same cone supplier using the same stamping moulds from the same cone manufacturer. The issue is the trader on EBay who could be a fraudster or reputable.

    Provided an aftermarket kit meets the key specs there is no reason not to use it. Starting an ill conceived rumour mill that aftermarket parts are no good based on pure opinion is damaging to the legacy of any driver brand once the original manufacturer stops supporting replacement parts.

    The thing is that while Jbl was an American organisation with manufacturing based in the USA a lot of the product for the hifi consumer loudspeaker product was sold into Japan. Some on this website may have trouble with that but thatís the reality and remains so. Most have not been to Japan to see the product. The requests for different products logically came from Harmanís Japan office which l understand was run as a separate company.

    I may buy one of these kits myself and check it out.

  10. #10
    Senior Member
    Join Date
    Feb 2019
    Location
    Germany
    Posts
    303
    One could think that it's easy to verify the correct mass by putting the C.U.T. (cone under test ) on a scale before installing it into a basket and compare with the data given by JBL. Anyway, the crux is that even JBL's data don't appear to be too reliable. For example, look at the table of woofer TSPs that can be found here or on JBLpro's site. The cone mass reads 105 g for the 2234H and 150 g for the 2235H. But we all know the original bronze mass ring's (that divides the 2235 from the 2234) mass is only 35 g! So, where are the lacking ten grams? Is the 2234H's cone mass value correct or the 2235H's? Or are they both wrong? Who may know for sure?

    Best regards!

  11. #11
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    Australia
    Posts
    7,266
    The approach requires a Jbl cone kit mounted and a full test of all TL parameters, impedance and response, distortion.

    The TL test calculates all aspects of the drivers.

    On the 2230 that particular coating effected the midrange response so they went another route with the mass ring. As it turns out the 2335 without the mass ring has improved mid band response. This driver can be EQ in a smaller enclosure with the same bass response as a 2335.

    Back to this white cone driver l would not right it off until itís properly evaluated.

    A long time ago Jbl had QC problems with the woofers. So a SR driver company locally made an equivalent driver but far more robust with construction. With finite analysis tools these days itís not difficult to mimic a driver.

  12. #12
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    2,771
    One point of interest is the proper cone for the 2234-2235 is and has always been made by Hitachi. It is considerably stiffer and harder paper than most other JBL cones. This paper was sourced for increased midrange performance.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  13. #13
    Senior Member
    Join Date
    Feb 2019
    Location
    Germany
    Posts
    303
    Hi Barry,

    where from could we source these Hitachi cones, please?

    Best regards!

  14. #14
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    2,771
    Hello Kay;

    If and how one could source these cones from Hitachi I do not know.

    What I wanted to say is that a 2234-2235 cone kit with any other paper will not be ďthe sameĒ even all the rest is correct.

    Barry.
    If we knew what the hell we were doing, we wouldn't call it research would we.

  15. #15
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    Australia
    Posts
    7,266

    Thumbs up

    You might have to buy in 1000 lots.

    I think a detailed discuss on cones is best left for Edgewound.

    He can source cones and has the contacts.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help For Best 2235 Recone Kit
    By azzd in forum Lansing Product Technical Help
    Replies: 14
    Last Post: 07-16-2016, 10:47 AM
  2. JBL 2215A/ E-145 and 2235 recone kit
    By hlaari in forum Lansing Product Technical Help
    Replies: 6
    Last Post: 01-28-2011, 11:33 AM
  3. 2235 recone
    By Domino in forum Lansing Product Technical Help
    Replies: 6
    Last Post: 12-31-2005, 04:28 PM
  4. 2226 to 2235 recone?
    By Zilch in forum Lansing Product Technical Help
    Replies: 8
    Last Post: 01-06-2005, 05:36 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •