Results 1 to 13 of 13

Thread: 2235 reconing for subs

  1. #1
    Junior Member
    Join Date
    Feb 2006
    Location
    Berlin
    Posts
    3

    2235 reconing for subs

    Dear Lansing community,

    this is my first post here. But I'm not entirely new since I've already been reading along for a while. I'm not an expert on loudspeakers but I hope when getting some good advice I'll be able to do what I've been told. So please forgive me if my questions seem a bit strange for people quite familiar with this stuff.

    I'm considering of building a subwofer for home use and somewhere in this forum I've read the 2235 works well. And to be shure of what you get reconing a damaged woofer shall be a good approach.

    Currently there are two 2226h offered on ebay Germany - unfortunataly seperately. This is one of them:
    http://cgi.ebay.de/ws/eBayISAPI.dll?...MakeTrack=true

    Can you please give me some comments/advice for my project in particular concerning the following items:

    Can these woofers be reconed to a 2235 or are there any alternatives?
    How much is it?
    I've never done something like this before. Is it very difficult?
    If I can't do it by myself is there anybody in Germany/Europe providing good quality?
    Which enclosure is best? Maybe this depends on the loudspeaker I want add these to: Itīs a small tqwt suggested by l'audiophile in the 80ies. Efficiency is somewhat between 93 an 95 db/w/m (I can't measure this).
    And this leads to my last question: Do I have to go active?

    Thanks for any comments and greets
    pinguin

  2. #2
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,513
    Hi Pinguin and welcome!

    The 2226 can't be reconed as 2235! The gap/coil structure is different.
    You'll need K140, 2225, 2235 or 2234 cores. The Ferrit types are preferable.

    If you need an proposal for 2225 reconed as 2235, PM me with your real name and email. I'm a JBL reconer here in germany and currently have 2 2225 cores available.
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  3. #3
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    http://www.lansingheritage.org/html/.../1983-subs.htm

    B380 equivalent version for 2235H is near the end of the article....

  4. #4
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,306
    Jan 1990 Audio magazine has another take on a dual 2235H sub ... -huge- box, much
    less often mentioned. Interesting read. -grumpy

  5. #5
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    I'm not finding it online.

    You have a copy, Grumpy?

    [And a scanner? ]

  6. #6
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,306
    copy, yes. scanner no. I couldn't find it online either or I'd have inserted a link.
    I'll try to capture the gist of it and post this evening. -grumpy

  7. #7
    Senior Member grumpy's Avatar
    Join Date
    Oct 2003
    Location
    SoCal
    Posts
    5,306

    Dual 2235's

    First off, sorry for hijacking the thread...

    Article is "Certified Bass for the Certifiable", by James S. Sherwin. Audio magazine, January 1990, Vol. 74, No 1.

    From Table III - Box and system parameters

    Net Internal Volume (Vb): 22.9 cu ft
    Helmholtz Resonance Frequency (f1): 20.0 Hz
    Box Leakage Q (Q1): 3.0
    Minimum Vent Area: 169.2 cu in.
    (author probably meant sq in)

    author compares several vent length vs. port area (sq in) and diameter options

    Tuning Ratio = H = Fb/Fs = 1.000

    Alpha = Vas/Vb = 1.415

    The author spends some time discussing outdoor measurements,
    boundary loading, thermal vs. excursion limits, and subjective in-room
    experience.

    I'll be passing a copy on to a member who has volunteered to scan/post.

    Cheers,

    -grumpy

  8. #8
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    Geez, that's the size of the 4688 TCB Monster Sub....

  9. #9
    Senior Member Guido's Avatar
    Join Date
    Apr 2003
    Location
    Germany
    Posts
    2,513
    Sorry pinguin my 2225 cores are sold!
    BLS Reference on Passlabs XA 30.5 + Everest DD66000 clone on Pass XA 100.5

  10. #10
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    Article:
    Attached Images Attached Images     

  11. #11
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    The rest:
    Attached Images Attached Images   

  12. #12
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    7,906
    Nice going Zilch we should drop that one in the Tech Library with the other sub article so it doesn't get lost.

    Rob

  13. #13
    Junior Member
    Join Date
    Aug 2005
    Location
    Valence ( France )
    Posts
    16

    Sherwin horn system

    Quote Originally Posted by Robh3606
    Nice going Zilch we should drop that one in the Tech Library with the other sub article so it doesn't get lost.

    Rob
    More information available about the James S. Sherwin stereo horn system?Particularly the bass/midbass short exponential horn and speaker design, operating from 80 to 700 Hz ?

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Actual differance between 2220 and 2235 baskets
    By Flodstroem in forum Lansing Product Technical Help
    Replies: 11
    Last Post: 11-16-2018, 02:02 PM
  2. 2235 Break in Time
    By Anton in forum Lansing Product General Information
    Replies: 56
    Last Post: 07-27-2006, 06:23 AM
  3. 2235 recone
    By Domino in forum Lansing Product Technical Help
    Replies: 6
    Last Post: 12-31-2005, 04:28 PM
  4. Getting a 2235 from other baskets?
    By still4given in forum Lansing Product Technical Help
    Replies: 8
    Last Post: 08-11-2004, 12:45 PM
  5. 2235 and 2245
    By Niklas Nord in forum Lansing Product General Information
    Replies: 10
    Last Post: 11-24-2003, 01:22 PM

Posting Permissions

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