+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 25

Thread: L300 clone using TAD drivers

  1. #1
    Junior Member charlesmc75's Avatar
    Join Date
    Dec 2005
    Location
    ohio
    Posts
    5

    L300 clone using TAD drivers

    What are the opinions on building a L300 summit clone using TAD drivers? TL-1601c for the LF, TD-4001 for the mids, and the ET-703 for the highs? the enclosure might have to be a little larger than stock for the 1601, but why not? the original L-300 was a bit short anyhow. And that et-703 goes up to 45k, at least according to TAD.

  2. #2
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    2,945
    Widget's been working on a similar speaker using TAD treble and ultra high frequency drivers, but he prefers the JBL 1500AL woofer. Don dropped a note in here a while back saying he'd talked to some TAD people. The accordian surrounds are there for durability because the woofers are often used in recording studios for the mains and they get pounded bad. With foam surrounds the warrantee work was killing them. But sonically they preferred the foam.

    The 1500AL woofer is a development of the Alnico motor which includes and exceeds the engineering JBL devised to make the ferrite motors sound better back in the 80's. Do a search here and read up on it. It's very articulate bass. Don't know what the availability is.

    Your idea would probably be a very good speaker. Just thought I'd suggest you look into the JBL woofer.

    David

    Edit: What horn would you use?

    And then there's the crossover.

  3. #3
    Junior Member charlesmc75's Avatar
    Join Date
    Dec 2005
    Location
    ohio
    Posts
    5

    1500 al

    the 1500al would probably be my first choice, as well as the other Be goodies from the k2-9800 but availibility issues rule them out, unless i want to import them from japan, but ouch$$$$ so a 1601 would do, maybe a e145 or something similar. classic audio reproductions sell the 537-509 lens for 750 a pair. not a bad price really. i know that they are not original to the L300, but you don't hear hartsfield owners complaining.

  4. #4
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    2,945
    Seems as though you have looked into it thoroughly. I didn't know about that horn/lens reproduction and am glad to learn of it. Have you heard it? I've never heard a Hartsfield.

    David

  5. #5
    Junior Member charlesmc75's Avatar
    Join Date
    Dec 2005
    Location
    ohio
    Posts
    5
    no i have not heard them, but classic audio reproduction's stuff gets good reviews, even dr. harvey gizmo gave them a thumbs up. i am thinking about starting a project soon, and i am in the research, brainstorming phase. just playing around with different ideas. it would be nice if someone could give me their impressions on the old style jbl horn lens vs. a more modern wooden radial horn. i know that the radial will go lower, but i have a smallish room. and the horn lens shouldn't be overpowering in my enviroment. thats why they were so popular in studio control rooms. but with that being said, all of the tad's that i have seen in studio pics are radial horns.

  6. #6
    Senior Member Ken Pachkowsky's Avatar
    Join Date
    Apr 2003
    Location
    Baja, Mexico
    Posts
    1,706
    I have not heard widgets system lately but have spent a great deal of time talking to him over the last 3 years. He is tough to please. I was talking to him the other day and he says his new boxes are the best system he has ever heard. Take it for what you will, but it almost got me driving the 9 hours to check them out.

    Ken

  7. #7
    Junior Member charlesmc75's Avatar
    Join Date
    Dec 2005
    Location
    ohio
    Posts
    5

    widgets project

    i did a search and i think that he sold them. his cabinet design looks incredible. http://audioheritage.org/vbulletin/s...&highlight=tad i am stuned at the amazing projects in this forum, i wish i had half of the ability of the diy gods that i have seen here.

  8. #8
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,985
    Naw, that was his earlier attempt at building them, aborted due to cabinet resonance problems.

    We haven't seen his latest version, other than as a pile of MDF dust in his CNC mill, here on the forum yet.

  9. #9
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    The Tardis
    Posts
    5,908
    Quote Originally Posted by charlesmc75
    What are the opinions on building a L300 summit clone using TAD drivers? TL-1601c for the LF, TD-4001 for the mids, and the ET-703 for the highs? the enclosure might have to be a little larger than stock for the 1601, but why not? the original L-300 was a bit short anyhow. And that et-703 goes up to 45k, at least according to TAD.
    Charles,

    Interesting idea but the limiting factor of the L300 was not the drivers but the disscontinuity b/n the woofer and the horn. This is partly what drove the 4430-35 research and there is a very good paper by David Smith published on the forums about the issues.

    If you use a different horn fine, but it won't be anything like a L300.

    May I suggest the Tad woofer, a 4001 with a JBL 2344 horn per the 4430 design outline, tweeter not necessarily required. If you use the JBL $1500AL would would be wise to Eq the bottom two octaves.

    Enter the complex world of loudspeaker design

  10. #10
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    8,275
    Hey Ian,

    I agree that the transition from the woofer to the horn is the weakest link in that design, but I'd suggest going the 4343/4 route instead of the 44XX route... It is subjective, but I find there is still a problem with the 44XX design... the 15" driver is asked to do too much.

    Also if you do go with a TAD and a 2344, you should use a 1" TAD. Either the 2001 or the 2002. Either will require a fair amount of crossover design research as they have different characteristics than the JBLs and as it has been hinted at along the way of Zilch's thread... CD compensation isn't a one size fits all proposition.

    My two cents worth...


    Widget

  11. #11
    Senior Member Ian Mackenzie's Avatar
    Join Date
    Apr 2003
    Location
    The Tardis
    Posts
    5,908
    I am not familiari with TAD model numbers..

    I recall Kent E has successfully used a TAD 2001 with the 2344..he maybe able to advise the Eq updates if requested.

  12. #12
    Super Moderator yggdrasil's Avatar
    Join Date
    Dec 2004
    Location
    Bodø, Norway
    Posts
    1,119
    With the 4001 you could look at larger horns with a lower crossover point.
    Johnny Haugen Sørgård

  13. #13
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    8,275
    Quote Originally Posted by yggdrasil
    With the 4001 you could look at larger horns with a lower crossover point.
    Absolutely! That is the way I would go! As others have said... bigger horns sound better. That's a gross generalization... please don't take it literally, but I think you know what I mean.


    Widget

  14. #14
    Senior Member Uncle Paul's Avatar
    Join Date
    Feb 2005
    Location
    Oregon City, Oregon, USA
    Posts
    374
    Widget, Where did you get those TH-4003 clones?
    "Zobel is as zobel does"

  15. #15
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    8,275
    Made 'em.

    Widget

+ Reply to Thread

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. The Great Alnico / Ferrite Debate
    By Don McRitchie in forum General
    Replies: 1
    Last Post: 07-16-2007, 04:53 AM
  2. Westlake HF Horns
    By aust-ted in forum General Audio Discussion
    Replies: 15
    Last Post: 09-10-2005, 01:05 PM
  3. Help with my JBL L300 "fuzzy" in one speaker.
    By jpchleapas in forum Lansing Product Technical Help
    Replies: 16
    Last Post: 05-05-2005, 02:57 PM
  4. L300 convert to 4343?
    By tv506 in forum Lansing Product Technical Help
    Replies: 1
    Last Post: 10-24-2003, 12:08 PM
  5. TAD 4002 compression drivers
    By scott fitlin in forum Miscellaneous Gear
    Replies: 13
    Last Post: 07-13-2003, 11:37 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