X-over modification Question

jdhdiggs
jdhdiggs Posts: 4,305
edited February 2006 in DIY, Mods & Tweaks
My speakers have an external, high level X-over. I also have schematics and some decent soldering skill. How difficult would it be to modify the X-over from handling high level to line level inputs and output the same?

Should I just start over with the schematics and build from scratch? My concern is the output impedence causing a screw up in the X-over and popping parts. My EE is getting rusty so I'm looking for input from someonw whose done something like this or can use the schematic to give me an idea of mods needed.

The X-over is the external portion of the belows. I believe I have the rev 1, but I can't be sure untill I get back home.

I'm hoping this is just a case of adding RCA plugs and a resistor...

Purpose: Active bi-amping
There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
Post edited by jdhdiggs on
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Comments

  • dudeinaroom
    dudeinaroom Posts: 3,609
    edited January 2006
    The inductance coils, and capacitor values are set to work with the impeadance
    of your drivers to achive their cross over freq. If you try coping this to make a line level crossover to place inbetween your pre. and your amp the frequency(s) are going to be way off due to impeance mismatch (going from 4 or 8 ohms on the speakers to 10k+ohms on the electronics. at least thats what I seem to recall from my 4 months of electronic classes.
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited January 2006
    That's my concern. However, the high ohm levels would be on each side of the crossover. How that affects the circuit beyond limting current flow, well, I left Pspice in my other computer and I am not pulling out my circuits book if I can help it.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited February 2006
    Just a follow up, tried this out. High's make it through, mids and bass are barely audible.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • ohskigod
    ohskigod Posts: 6,505
    edited February 2006
    whats speakers are you playing with, the maggies? or a diy project
    Living Room 2 Channel -
    Wiim Ultra. Jolida CD player. Fiio k11 R2R DAC, XTZ as300 Edge amp. Focal Cobalt 826 towers,

    Upstairs 2 Channel Rig -
    Classe Audio 5 Preamp, DIY1200as2 Icepower Amp x 2, Wiim pro streamer and Topping E70 Velvet DAC, California Audio Labs DX1 CD player, Polk LSi15's with MM840 woofer upgrade.

    Studio Rig - Scarlett 18i20(Gen3) DAW, Schitt Saga 2 preamp, Topping a90 headphone amp, Mac Mini, Audiophonics Hypex NC252m amp, Polk r200's
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  • jdhdiggs
    jdhdiggs Posts: 4,305
    edited February 2006
    The maggies external X-over.
    There is no genuine justice in any scheme of feeding and coddling the loafer whose only ponderable energies are devoted wholly to reproduction. Nine-tenths of the rights he bellows for are really privileges and he does nothing to deserve them. We not only acquired a vast population of morons, we have inculcated all morons, old or young, with the doctrine that the decent and industrious people of the country are bound to support them for all time.-Menkin
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  • DarqueKnight
    DarqueKnight Posts: 6,765
    edited February 2006
    jdhdiggs wrote:
    How difficult would it be to modify the X-over from handling high level to line level inputs and output the same?

    Purpose: Active bi-amping

    You should call or write the speaker manufacturer. In addition the the bi-amping modification, they might also be able to provide other performance enhancement tips.
    Proud and loyal citizen of the Digital Domain and Solid State Country!
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  • pjdami
    pjdami Posts: 1,894
    edited February 2006
    Did you try searching the MUG (Magnepan User's Group) forum or posting there? Check out the tweaks section.

    http://www.integracoustics.com/MUG/MUG/
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