• 01-03-2006, 01:22 AM
    alexperl
    Passive Crossover For Sub...
    Hi..
    I got Power Amp From Rotel RB-956AX 6x60watt 8ohm, and i can adjust vol Level on every chanel, I can Bridge every 2 chanels to 100watt.
    I whant to build a subwoofer.
    I whant to use this Power amp to drive the subwoofer.
    I need to build a passive Crossover for the Woofer that i will pick up.
    My room is 4mX5m.
    I have 2 AR.COM's Bookshelf speakers(I like them very much) and they cut of at 60hez.
    I do not need 15' monster subwoofer, i am thinking somthing like 8'-10'.
    My question:
    1. Is it a good idea?
    2. Haw do i do that :)
    3. I need 10' dirty cheap driver 70$-100$(It must be from madisound)
    Thank you guys..
  • 01-03-2006, 04:13 AM
    Feanor
    Better off with an active crossover
    Quote:
    Originally Posted by alexperl
    Hi..
    ...
    I need to build a passive Crossover for the Woofer that i will pick up.
    ...
    .
    Something like this Behringer between you preamp and the the Rotel ...
    This is relatively cheap at about US$90, and offers great flexibility.
  • 01-03-2006, 09:13 AM
    alexperl
    Thank you but this is too expansive, i want to build something like 30$ crossover.
  • 01-03-2006, 07:41 PM
    pelly3s
    What frequency do you want it to crossover at?
    What slope do you want?
    What impedence driver do you want to use?
    Why only Madisound?
  • 01-03-2006, 11:13 PM
    alexperl
    Quote:
    Originally Posted by pelly3s
    What frequency do you want it to crossover at?
    What slope do you want?
    What impedence driver do you want to use?
    Why only Madisound?
    I want to crossover it at 60hz becouse my bookshelf's go down to 60hz.
    I do not know what is slope...
    I need to buy the driver, i want to use some 10' driver 70$-100$ .
    I am from Israel and i like to buy from Madisound, and the shipping rate is not big as at partexpress.
  • 01-04-2006, 05:37 AM
    pelly3s
    1 Attachment(s)
    the simplest crossover you can do is a coil in series with the woofer it would be about a 21mh coil for a 6db per octave slope at 60hz with an 8 ohm driver. to make a little better you can yes a 30mh coil and a 235mfd cap it would look like the image i attached. as for the driver i couldnt really find too much that would be good in that price range i will leave that answer up to someone else in the forum
  • 01-04-2006, 08:57 AM
    alexperl
    thank you .. but do i have any program in the net that i can construct a crossover for the sub?
  • 01-04-2006, 05:59 PM
    pelly3s
    you can go right to the site that i ripped my numbers off from and that lovely picture www.the12volt.com
  • 01-05-2006, 03:28 AM
    alexperl
    Thank's