Page 11 of 12 FirstFirst ... 9101112 LastLast
Results 151 to 165 of 166

Thread: Tribute to Lansing-Heritage-Forum and DIY 2405 & 2446 & E145 build

  1. #151
    Senior Member berga12's Avatar
    Join Date
    Jan 2016
    Location
    Italy
    Posts
    221
    go down to 25-28hz in 170Lt.

  2. #152
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659

    TAD 1603 venting

    These TAD 1603 woofers have additional venting-slots at the side of the magnet.
    There is a little foam-piece inside of each of them.
    Is this to stop dust and dirt to enter and should remain inside? Or do I have to remove these?

    Name:  17410238_1381113158620485_427318712_n.jpg
Views: 1200
Size:  115.9 KB

  3. #153
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    Keep the foam filters in place .

    They are particulant protection ( to the coil venting ) .


  4. #154
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659
    Thanks for your quick answer!

  5. #155
    Senior Member
    Join Date
    Apr 2014
    Location
    Europa Union
    Posts
    130
    Leave the foam !
    Tune Fb to get 32Hz, with 180L you will be close to TAD and Rey Audio speakers designs. TL-1603 can be used like TL-1601b used by Rey Audio. RM-7VC has a big enclosure probably more for one TL-1601b than your 225L. You can also try not reducing the volume, with lower Fb.
    225L Fb 30Hz might work well, close to Rey Audio RM6-VC but for one driver, (be carefull adjusting a bit the mid/high level to adapt them).

  6. #156
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659
    Thanks a lot, very interesting infoīs!

    Do you know about the original TAD bassreflex-ports?
    What dimensions do they have? What would be the the length for two 4" ports?

  7. #157
    Senior Member
    Join Date
    Apr 2014
    Location
    Europa Union
    Posts
    130
    For TL-1601a (T/S parameters are a bit different) TAD used for TSM2/2402 around 135L of volume and Fb 32Hz.
    There were two 100mm ports (Japanese do not use units from the Middle Age ), with a length of 105mm. Suprisingly if you try to simulate them you will find another length, but this is the right one. Depending upon your exact volume and damping you'll have to adjust the length by doing impedance measurements.
    For RM-11BC using TL-1601b (T/S identical to TL-1603) I don't know the ports length, only that the port diameter is larger, around 120mm, but Fb is also 32Hz, with a larger volume than for TSM2/2402, something around 170L.

    PS: Next time I'll be around Hamburg I can come with some measurement tools to help if needed.

  8. #158
    Senior Member
    Join Date
    Apr 2014
    Location
    Europa Union
    Posts
    130
    Quote Originally Posted by Dr.db View Post
    These TAD 1603 woofers have additional venting-slots at the side of the magnet.
    There is a little foam-piece inside of each of them.
    Is this to stop dust and dirt to enter and should remain inside? Or do I have to remove these?

    Name:  17410238_1381113158620485_427318712_n.jpg
Views: 1200
Size:  115.9 KB
    These are second hand units or not coming from a fresh stock ? The actual ones have a different orientation for the binding posts (as 1601a and 1601b). If there are from second hand you should check their T/S parameters, there are plenty of aged TAD speakers on the market, removed from studio monitors or PA loudspeakers. If you have any issue with one of them, the good address in Europe for getting recone kits is in Germany (hornstudio.de).

  9. #159
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659
    Quote Originally Posted by dn92 View Post
    These are second hand units or not coming from a fresh stock ? The actual ones have a different orientation for the binding posts (as 1601a and 1601b). If there are from second hand you should check their T/S parameters, there are plenty of aged TAD speakers on the market, removed from studio monitors or PA loudspeakers. If you have any issue with one of them, the good address in Europe for getting recone kits is in Germany (hornstudio.de).
    Indeed, they are second hand coming from another DIY-guy here in germany. He bought them new at hornstudio.de around 6-7 years ago... To be honest I have no measurement tools to check TSP.

    Quote Originally Posted by dn92 View Post
    PS: Next time I'll be around Hamburg I can come with some measurement tools to help if needed.
    You are very welcome!
    Unfortunatelly I donīt live in Hamburg anymore, I have moved to Rostock. Thats about 200km away... But if you are around, feel free to give me a visit.

  10. #160
    Senior Member
    Join Date
    Apr 2014
    Location
    Europa Union
    Posts
    130
    Not so old then and were not used for PA, they should be OK then.
    To tune the br ports length it is useful to have somthing for measuring the impedance response such as a Dayton DATS that is not so expensive.

    Thanks for the invitation, same for you if you come to Paris

  11. #161
    Junior Member
    Join Date
    Mar 2013
    Location
    Serbia
    Posts
    15
    Quote Originally Posted by Dr.db View Post
    Indeed, they are second hand coming from another DIY-guy here in germany. He bought them new at hornstudio.de around 6-7 years ago... To be honest I have no measurement tools to check TSP.



    You are very welcome!
    Unfortunatelly I donīt live in Hamburg anymore, I have moved to Rostock. Thats about 200km away... But if you are around, feel free to give me a visit.
    Hi Dr.db,

    I'm wondering why you're not using the active system with ethernet interface?
    You can resolve a lot of frequency and phase response issues, experiment with different drivers, etc., all being very easy and comfortable without the need to mess with X-overs.
    As your drivers are very efficient, you just need one 6-channel amp or three 2-channel amps of moderate power and one DSP 3-IN 6-OUT or 4-IN 8-OUT (better) for future use in 3-way+SUB or 4-way system. Later on you can expand to more powerful amps if you like.

    Mica

  12. #162
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659
    The initial plan of this project was to run the speakers by a single amp and minimise the equipment...

  13. #163
    Junior Member
    Join Date
    Mar 2013
    Location
    Serbia
    Posts
    15
    Quote Originally Posted by Dr.db View Post
    The initial plan of this project was to run the speakers by a single amp and minimise the equipment...

    The passive system does not allow any errors and it is very difficult to optimize it in an original design like yours.
    In any case, we hope that the project will continue.

  14. #164
    Senior Member
    Join Date
    Sep 2008
    Location
    Germany / Hamburg
    Posts
    659
    Thatīs true, thank you!

  15. #165
    Senior Member Doctor_Electron's Avatar
    Join Date
    May 2003
    Location
    California Central Coast, USA
    Posts
    323

    Sick

    Very Sick. Please keep it that way!
    "Why don't you Mine your own Bismuth, so you won't be mining mine?"

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Your vote for the best Lansing Heritage forum threads, and why?
    By mikebake in forum Lansing Product General Information
    Replies: 5
    Last Post: 10-05-2005, 12:21 PM
  2. Lansing Heritage 5th Anniversary
    By Don McRitchie in forum Forum Announcements
    Replies: 69
    Last Post: 05-25-2005, 10:53 PM
  3. Thanks Lansing Heritage
    By Anton in forum Lansing Product General Information
    Replies: 0
    Last Post: 05-02-2003, 12:27 AM
  4. Welcome to the Lansing Heritage Forum
    By Don McRitchie in forum Forum Information - Read Only
    Replies: 0
    Last Post: 04-18-2003, 10:18 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
  •