Results 1 to 9 of 9

Thread: N-501-8B Networks with Onkens/288’s?

  1. #1
    Junior Member
    Join Date
    Apr 2011
    Location
    ICT, Kansas
    Posts
    12

    N-501-8B Networks with Onkens/288’s?

    Hey guys. I have a question.

    On my onkens which i purchased, didn’t build myself, they were using a recapped pair of N-501-8B networks with 902-8 CDs and 511 horns. They always sounded pretty good to me. Now the upgrade bug has got me and I bought a set of Jabo KH-55 horns with 1.4” adapters and some Altec 288(C’s I think) on them.

    I am running 416Z’s on the low end that are getting reconed to 8ohm drivers by GPA.

    My question is are the N-501-8Bs a good choice for this combo in a 360L Onken enclosure? Or should I sell them and persue a better option for my combo? Technical stuff like crossovers is a dark art to me and I just need to know what to do.

    Thanks!

    - Woody

  2. #2
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    My best advice is to simply try it ( listen & then maybe measure it's acoustic effects if you want to get serious about trying to make this stuff work ).

    This ( N-501-8B ) network might work very well ( or at least good enough ).

    FWIW, I've never seen a complete schematic for this crossover /// so it's impossible to predict it's interaction with your chosen horn/driver combo .

    ( Obviously ), this combo is not part of the Altec handbook, so some response errors are to be expected ( in a custom lash-up such as your are implementing ).


  3. #3
    Senior Member gdmoore28's Avatar
    Join Date
    Jan 2014
    Location
    Arkansas
    Posts
    245
    I'll bet the 288/Jabo/N501/416 Onken combo will sound nice.

    Earl - I hate to sound like a broken record, but do you think that adding the Altec 30923 eq network after the N501 will work as well with the 288 as with the small format drivers? Both formats seem to have the same highly accentuated midrange response.

    GeeDeeEmm


    Pic from here: http://theartofsound.net/forum/showt...734-Jabo-horns


  4. #4
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    GDM,

    The N501-8B may already have the 30923 ( padding with some mild HF contour ) built into it.

    That's the speculation ( anyway ) according to this older thread on the subject.

    The info is not corroborated of course ( that's nothing new regarding older Altec stuff ), but there are some strong inferences .

    The Jabo ( type ) horns additionally focus the HF into quite a laser beam ( compared to a 511 ) bumping it upwards >> therefore the need for full HF compensation is likey mitigated vs say the typical Altec sectoral/radial ( which needs more help in the HF ) .

    That's why I replied earlier, it'll likely "be fine" ( conditional to individual taste , obviously ).




    Ps; There's just no substitute for making personal measurements and then using them to identify one's own preferences.

  5. #5
    Junior Member
    Join Date
    Apr 2011
    Location
    ICT, Kansas
    Posts
    12
    I really need to get the equipment and learn to measure in room I suppose. Is there software to do it that is Mac compatible? I haven’t owned a PC in 15years.

    I was was hoping for a more definitive answer than “try them” :-) but I kinda figured that’s what you guys were gonna say. Haha!

    i guess I need to get these all put back togeather and then give them a try. Hopefully soon.

    - Woody

    Name:  C217A578-6E00-4411-B7D0-C02B47E2E43A.jpg
Views: 559
Size:  123.6 KB


    Quote Originally Posted by Earl K View Post
    GDM,

    The N501-8B may already have the 30923 ( padding with some HF contour ) built into it.

    That's the speculation ( anyway ) according to this older thread on the subject.

    The info is not corroborated of course ( that's nothing new regarding older Altec stuff ), but there are some strong inferences .

    The Jabo ( type ) horns additionally focus the HF into quite a laser beam >> therefore the need for ultra HF compensation is really quite mitigated vs say a typical Altec sectoral/radial .

    That's why I replied earlier, it'll likely "be fine" ( conditional on individual taste , obviously ).




    Ps; There's just no substitute for making personal measurements and then using them to identify one's own preferences.

  6. #6
    Senior Member
    Join Date
    Apr 2003
    Location
    GTA, Ont.
    Posts
    5,109
    Quote Originally Posted by ictwoody View Post
    I really need to get the equipment and learn to measure in room I suppose. Is there software to do it that is Mac compatible? I haven’t owned a PC in 15years.

    I was was hoping for a more definitive answer than “try them” :-) but I kinda figured that’s what you guys were gonna say. Haha!

    i guess I need to get these all put back togeather and then give them a try. Hopefully soon.

    - Woody

    Name:  C217A578-6E00-4411-B7D0-C02B47E2E43A.jpg
Views: 559
Size:  123.6 KB

    "FuzzMeasure" is the most common ( & stable ) Mac-based measuring software . It's very affordable with an easy enough, learning curve .

    Room EQ Wizard ( REW ) may in fact be better software ( & it's free ) but seems to confound many new users .



  7. #7
    Senior Member gdmoore28's Avatar
    Join Date
    Jan 2014
    Location
    Arkansas
    Posts
    245
    Quote Originally Posted by ictwoody View Post
    I really need to get the equipment and learn to measure in room I suppose. Is there software to do it that is Mac compatible? I haven’t owned a PC in 15years.

    I was was hoping for a more definitive answer than “try them” :-) but I kinda figured that’s what you guys were gonna say. Haha!

    i guess I need to get these all put back togeather and then give them a try. Hopefully soon.

    - Woody

    Name:  C217A578-6E00-4411-B7D0-C02B47E2E43A.jpg
Views: 559
Size:  123.6 KB
    Woody,

    Are those yours in this post? Those are beautiful, and so is the room.

    GeeDeeEmm

  8. #8
    Junior Member
    Join Date
    Apr 2011
    Location
    ICT, Kansas
    Posts
    12
    Quote Originally Posted by gdmoore28 View Post
    Woody,

    Are those yours in this post? Those are beautiful, and so is the room.

    GeeDeeEmm
    Yup. Those are snaps I took the other night. When I bought these from a guy in TX they had a Parts Express woofer, the 908-8 drivers (partially converted to 902's) and 511 horns on them along with the N-501-8B networks. I'm reworking them right now which is why they are apart. They also didn't have the damping inside the boxes as per the original plans. The build is great on the cabs. 1" china birch ply etc...

    Here they were in my space when I first got them.

    - Woody

    Name:  30317664833_f844f81033_k.jpg
Views: 494
Size:  116.9 KBName:  30317917283_183cd67eb9_k.jpg
Views: 607
Size:  76.2 KBName:  31088079326_6c7ebd1bba_k.jpg
Views: 548
Size:  108.1 KBName:  31124441735_9c98e9e53a_k.jpg
Views: 483
Size:  119.9 KB

  9. #9
    Senior Member gdmoore28's Avatar
    Join Date
    Jan 2014
    Location
    Arkansas
    Posts
    245
    Yes! I remember those. Must have seen and lusted over that pic a hundred times. Man, that is such a beautiful room.

    GeeDeeEmm

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Networks
    By Singer-Man in forum Lansing Product DIY Forum
    Replies: 5
    Last Post: 01-13-2017, 02:16 PM
  2. Networks
    By paragon in forum Lansing Product Technical Help
    Replies: 3
    Last Post: 10-05-2004, 02:26 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
  •