Results 1 to 7 of 7

Thread: 2-way speaker crossover design

  1. #1
    Member
    Join Date
    Jan 2017
    Location
    Croatia
    Posts
    190
    Thumbs Up/Down
    Received: 21/0
    Given: 10/0
    Rep Power
    3

    2-way speaker crossover design

    Hi all,

    I recently got a pair of blown Behringer active boxes. Decided to get rid of the amp and add a crossover so I can use them as passive boxes. I can find a load of schematics online and I understand how filters work, but I'm curious about which part "dictates" power handling? Obviously the capacitors have to be rated at certain voltages and I have to protect the tweeter somehow, but I figure inductors are a limiting factor current-wise and also the most expensive part?

    The speakers are 12" 500W and 1.75" tweeter.

    Alternatively, I'd go for active and adjustable crossover just for the sake of fiddling around.

    Any suggestions and literature are welcome.

    Regards.

    0 Not allowed! Not allowed!
    Last edited by m1989jmp; 10-26-2019 at 12:30 PM.

  2. #2
    Member mhuss's Avatar
    Join Date
    Nov 2006
    Location
    West of Philly
    Posts
    312
    Thumbs Up/Down
    Received: 23/0
    Given: 1/0
    Rep Power
    14
    I'd just buy a crossover from PartsExpress or someplace similar, unless you're really invested in the DIY ethos.

    0 Not allowed! Not allowed!

  3. #3
    Supporting Member
    Join Date
    Mar 2018
    Location
    Germany
    Posts
    2,237
    Thumbs Up/Down
    Received: 1,703/1
    Given: 969/2
    Rep Power
    5
    For best performance (frequency response, power handling) the crossover frequency and filter type (steepness) need to be tuned to the frequency responses/sensitivities (SPL) and the power capacities of the woofer and tweeter. Not a simple task at all.

    2 Not allowed! Not allowed!
    - Own Opinions Only -

  4. #4
    Lifetime Member
    Join Date
    May 2006
    Posts
    4,435
    Thumbs Up/Down
    Received: 424/1
    Given: 3/0
    Rep Power
    21
    Quote Originally Posted by Helmholtz View Post
    For best performance (frequency response, power handling) the crossover frequency and filter type (steepness) need to be tuned to the frequency responses/sensitivities (SPL) and the power capacities of the woofer and tweeter. Not a simple task at all.
    Absolutely correct. The quirky, nonlinear dependence of the speaker's complex impedance and sensitivity and the crossover's components to get a clean changeover from the bass to treble is very difficult, and most often involves multiple passes with new high-current, high value inductors and capacitors.

    The difficulties in making a good passive crossover have always driven me to bi-amping and third order active Linkwitz-Riley filters that can repeatably give you a good, constant power, no-holes-or-bumps crossover. This approach is typically easier on the amp as well.

    1 Not allowed! Not allowed!
    Amazing!! Who would ever have guessed that someone who villified the evil rich people would begin happily accepting their millions in speaking fees!

    Oh, wait! That sounds familiar, somehow.

  5. #5
    Old Timer tedmich's Avatar
    Join Date
    Apr 2008
    Location
    Sonoma CA
    Posts
    3,341
    Thumbs Up/Down
    Received: 224/2
    Given: 75/2
    Rep Power
    15
    tuning a specific speaker especially the totally custom / cost is the entire object combos on active monitors is very tricky (as many more knowledgeable have already said here!)
    if interested in active DIY, the MiniDSP set ups allow real open and easy design of active systems, and they are getting better/more sophisticated and cheaper every year.
    see: https://www.minidsp.com/products/minidspkits

    I'm planning to use this balanced unit
    https://www.minidsp.com/products/min...p-balanced-2x4
    to feed a ICEPower 400w amp/power supply sometime this year on a tiny subwoofer.

    0 Not allowed! Not allowed!

  6. #6
    Supporting Member loudthud's Avatar
    Join Date
    May 2006
    Location
    Near Dallas Texas
    Posts
    3,537
    Thumbs Up/Down
    Received: 220/0
    Given: 113/1
    Rep Power
    18
    It's very hard to protect the tweeter with a passive crossover system. You usually need to resistively attenuate the tweeter and add some type of limiter. In fact the first thing I would do is verify that the tweeters are not already toasted before going forward and spending any more money on these things.

    0 Not allowed! Not allowed!
    WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personnel.
    REMEMBER: Everybody knows that smokin' ain't allowed in school !

  7. #7
    Member
    Join Date
    Nov 2013
    Posts
    297
    Thumbs Up/Down
    Received: 115/11
    Given: 38/0
    Rep Power
    6
    i would get a 2 way active crossover and separate power amps, so you can assign an adequate level to the tweeter.

    1 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 2 users browsing this thread. (0 members and 2 guests)

Similar Threads

  1. Yamaha S4115H Speaker Crossover
    By TomCarlos in forum Maintenance, Troubleshooting & Repair
    Replies: 7
    Last Post: 10-02-2016, 02:13 PM
  2. Replies: 8
    Last Post: 01-25-2013, 02:44 AM
  3. behringer in speaker crossover limiter bulb
    By ripp in forum Maintenance, Troubleshooting & Repair
    Replies: 3
    Last Post: 03-11-2009, 07:52 AM
  4. Speaker cabinet design.
    By samtfaulkner in forum Music Electronics
    Replies: 1
    Last Post: 02-18-2009, 04:10 PM
  5. Monitor speaker/crossover question
    By ENB in forum Guitar Amps
    Replies: 4
    Last Post: 11-12-2008, 01:53 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •