Results 1 to 15 of 21

Thread: Crossover Value Selection - 2226/2446

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Junior Member
    Join Date
    Jul 2005
    Location
    Massachusetts
    Posts
    6

    Crossover Value Selection - 2226/2446

    Hello,

    Before I commit to the upgrade of my enclosure and crossover components, I would appreciate the forums input on my decisions.

    Crossover:
    Current: 500Hz
    Propossed: 1600 Hz

    LF:
    Driver: JBL 2226H
    Current Enclosure Volume: 7 cu ft
    Propossed Enclosure Volume: 5 cu ft

    I have replaced my Eminence 15" Delta Pro with the JBL 2226H. Reducing my current enclosure to 5 cu ft. Two ports - diameter of 4", length 4".

    HF:
    Driver: JBL 2446J (16 ohm)
    Currently my crossover is designed for 500Hz. The crossover will be changed to 1600 Hz, 12dB (2nd order) - Solen cap and Solen air core coil. My choice for L1 is 3.18 mH and C1 3.1uf - the driver is 16 ohms.

    Other points of validation:
    LF - I am choosing a 0.7 mH inductor for the LF crossover. Should I go air core - if so, what gauge.

    HF - What gauge shoould I choose for the HF air core inductor.

    Finally: any recommendations on bolt on speaker grills.

    Thanks in advance
    Jim

  2. #2
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    8,163
    Hello Jim

    Why are you running the 2226 so high?? You have a compression driver that could easilly support an 800Hz crossover point. What horns are you using?? Is their cutoff the reason for the high point on the woofer??

    Rob

  3. #3
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,785
    Quote Originally Posted by Robh3606
    Why are you running the 2226 so high?? You have a compression driver that could easilly support an 800Hz crossover point. What horns are you using?? Is their cutoff the reason for the high point on the woofer??
    I agree, Rob. At 1600hz the 2226 wil be fairly "beamy". JBL successfully used those components in numerous systems crossed over at 800hz. Much above that and you're losing some of the main benefits of the 2446.

    John

  4. #4
    Junior Member
    Join Date
    Jul 2005
    Location
    Massachusetts
    Posts
    6

    Crossover at 1600Hz

    Thanks for your quick response.

    The justification of crossing over at 1600 Hz is as follows:

    Decision was based on using an inductor and the natural roll off of the 2226 and thereby not requiring a capacitor in the LF crossover - simplifies the xover by a componet.

    See attached slide of the speaker. I am not sure what JBL horn I am using - bought it used with no visible model number.

    thanks
    Jim
    Attached Images Attached Images  

  5. #5
    Senior Member spkrman57's Avatar
    Join Date
    Feb 2005
    Location
    Columbus, Ohio
    Posts
    2,018

    I think i know where you are going with this!

    Wayne over at Pi speakers uses the 2226 up to 1.6khz to mesh with a 1" driver crossed over at 3rd order 1.6khz.

    The coil is not used for crossover purposes but instead reduces a natural rising response of the 2226 between 800hz and 1.6khz.

    The 2226 is down 20db at 2khz from what I have read from others.

    I use the 2226 in this fashion and find the results quite pleasing depending on the amp/2226 enclosure design and very critical is room placement.

    You must get them off the ground to avoid a muddiness at 250hz(common to most woofers/midbass drivers placed close to the ground.

    Hope this helps!

    Ron
    JBL Pro for home use!

  6. #6
    Junior Member
    Join Date
    Jul 2005
    Location
    Massachusetts
    Posts
    6

    Current Crossover at 500Hz

    Thanks for the input on the crossover discussion.

    My HF crossover for the JBL 2226J:

    1. 500Hz 12dB (2nd order) high pass - Solen cap and Solen air core coil
    2. 16ohm L-pad - Dale 1% chassis mount wirewound resistors
    3. 16ohm impedance compensation network - Dale 1% resistor and Solen air core coil
    4. 7KHz top octave compensation network - Dale 1% resistor and Sprague Orange Drop cap

    Changing out the high pass with 3mH and 3uF should take it to 1600Hz.
    Does the pseduo 1st order crossover for the LF play with the propossed modifications for the 2nd order HF crossover?

    Jim

  7. #7
    Junior Member
    Join Date
    Dec 2012
    Location
    United Kingdom
    Posts
    9
    Quote Originally Posted by spkrman57 View Post
    Wayne over at Pi speakers uses the 2226 up to 1.6khz to mesh with a 1" driver crossed over at 3rd order 1.6khz.

    The coil is not used for crossover purposes but instead reduces a natural rising response of the 2226 between 800hz and 1.6khz.

    The 2226 is down 20db at 2khz from what I have read from others.

    I use the 2226 in this fashion and find the results quite pleasing depending on the amp/2226 enclosure design and very critical is room placement.

    You must get them off the ground to avoid a muddiness at 250hz(common to most woofers/midbass drivers placed close to the ground.

    Hope this helps!

    Ron
    Do you know what value of inductor was used on the 2226H?

    Thanks

    DM

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. xpl200 -dx1 -active crossover ? help !
    By gerard in forum Lansing Product Technical Help
    Replies: 1
    Last Post: 10-28-2005, 10:16 PM
  2. Repair/Rebuild 3110 crossover
    By wpod in forum Lansing Product Technical Help
    Replies: 5
    Last Post: 10-16-2005, 01:56 PM
  3. It's in the crossover!
    By Steve Gonzales in forum Lansing Product General Information
    Replies: 17
    Last Post: 04-26-2005, 12:31 PM
  4. Crossover tweaking for new JBL horn system
    By jlharden in forum Lansing Product General Information
    Replies: 6
    Last Post: 03-29-2005, 02:52 PM
  5. Questions about the Ashly XR1001 Active Crossover
    By porschedpm in forum Lansing Product Technical Help
    Replies: 1
    Last Post: 12-19-2004, 02:37 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
  •