Page 1 of 2 12 LastLast
Results 1 to 15 of 21

Thread: altec 604 8g

  1. #1
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284

    altec 604 8g

    Hello,

    Ive finally got my hands on the duplex loudspeaker.
    Its the 604 8G and it seems to be in great condition. Im very happy with it...feels like i found the holy grail in audio and i am a happy camper.

    just one thing. the crossovers are not for the 604. but are the model 501-8a.

    a forum friend of mine said that this crossover will reduce woofer activity way below originally intended. 500hz?

    the build en looks of this crossover are quite similar so i think i want to have the original components build in here.
    problem is that i get confused from all the crossovers i find on the net and im asking for your help to simplify it for me.

    Can someone give me the schedule for the original 604 8G crossover

    OR

    recommend modifications on it and give the schedule for that. ( lets say if 100 diy people all think that a certain mod is preferable than i will try that)

    i will not build the crossover myself but will ask a friend to do it for me.

    thanks in advance for your replies

    kind regards
    robin

    ps...a link to another thread on this forum that can be usefull is apreciated also
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  2. #2
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    See Jeff Markwart's WebSite for recommended crossover designs relating to Altec 604 duplexes .

    - pdf of simplified 604-8H ( or G ) network


  3. #3
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,734
    Or buy the duplex crossover being sold by Great Plains Audio on eBay for $109 each. You definitely should not use the 501. The horn in the 604 8g unloads at about 1500 Hz , and your diaphragm would be at risk.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  4. #4
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    thanks guys...i will look into the information regarding upgrades and stuff.

    @ speakerdave...yes thanks...a guy on my forum said the same. so good thing i didnt try it.

    Ill post some pictures whan im ready to start building the cabinet.

    cant wait to hear these things in action
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  5. #5
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    im planning on making a cabinet that will fit my livingroom.
    so instead of a wider model im making it higher.

    it will be 105 cm tall ( 41,3 inch)
    front 43 cm ( 16,9 inch)
    back 33 cm ( 13 inch)
    depth 33 cm ( 13 inch)

    now im planning on making it a bass reflex system.
    when i see cabinets for the 604 they almost all have ports that are just holes in the baffle.rectangular.

    is there a reason why people dont use a pipe/vent of some kind?

    and the dimensions of this hole are they depending on the size of the cabinet in combination with the driver?
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  6. #6
    Dang. Amateur speakerdave's Avatar
    Join Date
    May 2003
    Location
    Northern California
    Posts
    3,734
    "PiAlign suggests a 5.5 cubic foot box tuned to 42Hz using a port 9.5" long and 9" diameter. You can also make the port rectangular, 10.5" x 6" and 9.5" long. These are inside dimensions of the port, and also inside dimensions of a cabinet. No displacement volume has been added, so you'll want to offset some for the space taken up by the parts inside. "

    Above is Wayne Parham's suggestion at the audio round table forum. I found it by googling "Altec 604 8g cabinet."

    You need to COPY the work of someone who can engineer (I.e. slide rules and actual knowledge of physics) a speaker enclosure. He is an example of that.

    Also, the plans for the Altec Stonehenge III are at the Jeff Markwart site mentioned above. There are others, but you need to copy the result of engineering that's been done.


    Quote Originally Posted by greyhound View Post
    im planning on making a cabinet that will fit my livingroom.
    so instead of a wider model im making it higher.

    it will be 105 cm tall ( 41,3 inch)
    front 43 cm ( 16,9 inch)
    back 33 cm ( 13 inch)
    depth 33 cm ( 13 inch)

    now im planning on making it a bass reflex system.
    when i see cabinets for the 604 they almost all have ports that are just holes in the baffle.rectangular.

    is there a reason why people dont use a pipe/vent of some kind?

    and the dimensions of this hole are they depending on the size of the cabinet in combination with the driver?
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  7. #7
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    Like Dave said , copy someone elses efforts that have been worked out .

    Billforts Audio Obsession







  8. #8
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    altec stonehenge III seems a marvelous solution

    almost the dimensions i was planning to use.

    thanks for that suggestion. and for keeping my feet on the ground
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  9. #9
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    Name:  ijzu.jpg
Views: 3696
Size:  171.2 KB Name:  e6aa.jpg
Views: 2966
Size:  4.2 KBmy enter button doenst work on this forum...did i best i could to post some pics. gonna need 4 layers of paint. black and shiny finish. H 111cm, W 43 cm, D 31 cm. gonna first rebuild Original filter values and work from there by trail and error. let our ears be the judge
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  10. #10
    Senior Member
    Join Date
    Oct 2003
    Location
    Texas
    Posts
    1,863
    Looks like somebody already dancing to the music yet to come!

  11. #11
    Senior Member martin_wu99's Avatar
    Join Date
    Jul 2007
    Location
    Xi'An,China
    Posts
    1,479
    Quote Originally Posted by greyhound View Post
    Name:  ijzu.jpg
Views: 3696
Size:  171.2 KB Name:  e6aa.jpg
Views: 2966
Size:  4.2 KBmy enter button doenst work on this forum...did i best i could to post some pics. gonna need 4 layers of paint. black and shiny finish. H 111cm, W 43 cm, D 31 cm. gonna first rebuild Original filter values and work from there by trail and error. let our ears be the judge
    Congrates,good job
    46 lover

  12. #12
    Senior Member martin_wu99's Avatar
    Join Date
    Jul 2007
    Location
    Xi'An,China
    Posts
    1,479
    Quote Originally Posted by greyhound View Post
    Name:  ijzu.jpg
Views: 3696
Size:  171.2 KB Name:  e6aa.jpg
Views: 2966
Size:  4.2 KBmy enter button doenst work on this forum...did i best i could to post some pics. gonna need 4 layers of paint. black and shiny finish. H 111cm, W 43 cm, D 31 cm. gonna first rebuild Original filter values and work from there by trail and error. let our ears be the judge
    Congrates,good job
    46 lover

  13. #13
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    thanks i have to give credits to my father in law.he's been a great help. Whole project will be a moderate sized 604 suited for average dutch living rooms...more pics will come and some explanation regarding x overs
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  14. #14
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

  15. #15
    Senior Member greyhound's Avatar
    Join Date
    Dec 2006
    Location
    netherlands
    Posts
    284
    http://forum.audiofreaks.nl/index.php?topic=31125.675cabinet


    some more pictures in this topic...

    project wll finished within a month..thanks t few good friends

    and annother pair of 604's will play again
    Attached Images Attached Images  
    finally i have a pair of 604 8g's....there not easy to find in the netherlands

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Altec 508A vs Altec Model 8 series II Help Please !
    By jgscott in forum Lansing Product General Information
    Replies: 3
    Last Post: 03-10-2020, 08:09 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
  •