Results 1 to 4 of 4

Thread: Altec 828/825 cabinet

  1. #1
    Member hifiapart's Avatar
    Join Date
    Apr 2009
    Location
    paris, france
    Posts
    46

    Altec 828/825 cabinet

    Hi,

    Could anybody provide some information on the size of the ports/vents on the 828 or 825 boxes. When I run WinISD (pro version) with the Thiele parameters for the 416-8a or for the 515b and use in that was the port size on the official plans it gives some strange results.

    The ports on the 828/825 are big, guidance will be appreciated.
    Attached Images Attached Images  

  2. #2
    Senior Member
    Join Date
    Feb 2009
    Location
    Michigan
    Posts
    115
    I've heard 75 square inches works well.

  3. #3
    Senior Member spkrman57's Avatar
    Join Date
    Feb 2005
    Location
    Columbus, Ohio
    Posts
    2,018

    Not exactly a technical response....

    But the VOTT cabs were horn loaded to 160hz and reflex loaded to 50hz at BEST!

    The cabinet/system is a hybrid of a bass reflex/front horn-loaded that would be approx 6db down at the horn flare frequency.

    I would say the A-7/VOTT cabs were down -6db @ 120hz and were most efficient in the midrange/lower midrange as designed for Cinema use behind perforated screeens.

    Later versions were EQ'd, but these speaker systems were excellent at what they were desiged for in the 1st place, which was theater sound reproduction, mainly in the vocal range.

    My 2 cents worth!

    Regards, Ron
    JBL Pro for home use!

  4. #4
    Junior Member
    Join Date
    Aug 2011
    Location
    florida
    Posts
    1

    825/828 plans

    Does anyone have some accurate 828/plans? I have a few versions but there seems to be some descepencies in all of them.

    Some have Datto joints some don't

    There also seems to be a 1/4 inch difference in external sizing. as well as 1/32 of inch in horn radious. as well as Joint construction and bracing.

    Looking for some Printable accurate blueprints if possible

    I have one set that had the top mounted over the sides and the bottom with the sides over the bottom.

    thanks

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Does Altec 515E driver suit Onken360 cabinet ???
    By AFans in forum Lansing Product DIY Forum
    Replies: 2
    Last Post: 03-24-2013, 07:58 AM
  2. Altec Heathkit Speakers, Horn, and Cabinet - ?
    By Storm in forum Lansing Product Technical Help
    Replies: 8
    Last Post: 08-19-2011, 03:18 AM
  3. Plans for Altec 612A cabinet?
    By baja in forum Lansing Product DIY Forum
    Replies: 4
    Last Post: 08-08-2008, 03:53 PM
  4. Olympus Cabinet Altec Driver any Thoughts?
    By mbottz in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 07-23-2007, 08:56 PM
  5. Plantronics to Acquire Altec Lansing
    By watchman in forum Lansing Product General Information
    Replies: 10
    Last Post: 08-31-2006, 09:04 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
  •