Page 1 of 2 12 LastLast
Results 1 to 15 of 27

Thread: Altec Big Red Monitors

  1. #1
    Claus K
    Guest

    Altec Big Red Monitors

    would anyone have more information on the Altec Big Red Monitors. I know they used 604 drivers and the Mastering Labs xover. I would like to know the size and whether they had an additional woofer.

    Regards

    Claus

  2. #2
    Guy L
    Guest
    I own a pair.

    The size of th cabinet s 30"x23"18.

    The "Super red" version had an extra 15" woofer in a much bigger sealed box.

  3. #3
    Claus K
    Guest

    Thanks!

    Thanks Guy!

  4. #4
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,734
    Originally posted by Guy L
    I own a pair.
    I've wondered about that Mastering labs crossover. Is it sealed so that you cannot see the components and wiring?

    David

  5. #5
    Claus K
    Guest

    Mastering Labs xover

    you can find the mastering labs crossover schematics on the soundpractices web pages under:

    http://www.soundpractices.com/images/604xover.pdf

  6. #6
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,734

    Custom Coils?

    OK. Looks like one would have to make the inductor that is tapped at 10 percent.

    Thanks,

    David

  7. #7
    Claus K
    Guest
    think that could be easily done by winding off a standard inductor til you get to the inductance of the lower part, apply a tap and rewind the wire.

    BTW: I modeled this in SPICE and I´m pretty sure that the schematics is a bit misleading. I assume that the lower half of the tapped inductor has the lower inductance not as the picture may imply.
    (which would be the other way round)

  8. #8
    Guy L
    Guest
    Originally posted by speakerdave
    I've wondered about that Mastering labs crossover. Is it sealed so that you cannot see the components and wiring?

    David
    The components and wiring can be seen. I'll have my camera back from service, within a week, and try to post pics.

  9. #9
    Senior Member
    Join Date
    Mar 2010
    Location
    Saint-Roch-de-l'Achigan
    Posts
    207
    Hi Guy

    so where is your camera

  10. #10
    Moderator hjames's Avatar
    Join Date
    Nov 2005
    Location
    NoVA - DC 'burbs
    Posts
    8,547
    Quote Originally Posted by maxserg View Post
    Hi Guy

    so where is your camera
    Well, Guy's last post has been here a while ...
    01-29-2004, 05:16 PM
    2ch: WiiM Pro; Topping E30 II DAC; Oppo, Acurus RL-11, Acurus A200, JBL Dynamics Project - Offline: L212-TwinStack, VonSchweikert VR-4
    7: TIVO, Oppo BDP103D, B&K, 2pr UREI 809A, TF600, JBL B460

  11. #11
    Member Guy in WNY's Avatar
    Join Date
    Jan 2007
    Location
    Lockport, NY
    Posts
    83

    Smile Camera Shop must be backed up!

    WOW! 6 years in the shop!
    Guy in WNY

  12. #12
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109


    Here's the M.L. network ( since the original link posted above, no longer works ) .

    And here's a look at the way the crossover was laid out inside it's box . ( I know it's not the best pic )



    <> cheers

  13. #13
    Junior Member
    Join Date
    Sep 2010
    Location
    Moldova,Republic of
    Posts
    12
    [QUOTE=Earl K;293532]

    Here's the M.L. network ( since the original link posted above, no longer works ) .

    And here's a look at the way the crossover was laid out inside it's box . ( I know it's not the best pic )




    Hello . can advise this crossover will be good for Altec 604 E - 8 ohm ?
    rgd

  14. #14
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    Hello . can advise this crossover will be good for Altec 604 E - 8 ohm ?
    Sorry, I don't really know if this network is meant for 8 ohm drivers .

    A quick glance at the values of the LC components within this schematic suggest that it's meant to mate a 16 ohm woofer with an 8 ohm compression driver .

    The best way to find out is to find someone with the necessary ( crossover ) modeling software to explore a few different impedance ( loads ) using this network ( & then take a look at the resulting voltage drives to confirm that the LF & HF portions, crossover in the neighborhood of 1500 hz ) .


    <> cheers

  15. #15
    Junior Member
    Join Date
    Oct 2010
    Location
    New York Lower Hudson VY
    Posts
    1
    Quote Originally Posted by Earl K View Post
    Sorry, I don't really know if this network is meant for 8 ohm drivers .

    A quick glance at the values of the LC components within this schematic suggest that it's meant to mate a 16 ohm woofer with an 8 ohm compression driver .

    The best way to find out is to find someone with the necessary ( crossover ) modeling software to explore a few different impedance ( loads ) using this network ( & then take a look at the resulting voltage drives to confirm that the LF & HF portions, crossover in the neighborhood of 1500 hz ) .
    <> cheers
    The Mastering Labs crossover was designed originally for the 604E which was nominally 16 ohms. By the time Audio Marketing got the license and started manufacturing Big Reds the 604E was replaced by the 6048G... so they ordered 16 ohm versions of 604G and later K's and put a sticker on the back calling them 604E2's.

    klett

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Altec 604 (series)
    By BigBamBoom in forum Lansing Product General Information
    Replies: 22
    Last Post: 07-28-2011, 09:22 AM
  2. Mysteries of Altec Lansings demise
    By dancing-dave in forum General Audio Discussion
    Replies: 22
    Last Post: 05-05-2005, 09:34 PM
  3. Studio Monitor Evolution and Use
    By Don McRitchie in forum General
    Replies: 0
    Last Post: 11-17-2004, 10:41 AM
  4. BIG monitors
    By Alex Lancaster in forum Lansing Product General Information
    Replies: 36
    Last Post: 11-30-2003, 11:30 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
  •