Disabling Internal Crossover on Lsi-15

Atomic Turtle
Atomic Turtle Posts: 39
edited December 2008 in Speakers
I just upgraded from Rti-12s to Lsi-15s, and I want to bi-amp them. I've got a Carver M-500 for the bass, an M-500t for the mids and highs, and a Rane AC-22 active crossover, and I've been really happy running my Rti-12s with this combo. I want to use the same setup for my Lsi-15s, but can anyone tell me how to disable the internal crossover on the 15s? Is there a schematic posted anywhere?

thanks in advance.
Post edited by Atomic Turtle on
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Comments

  • ben62670
    ben62670 Posts: 15,969
    edited December 2008
    Look in the vintage speaker section. The LSi15 XO runs the mids with the woofer. I am working on a set of the LSi15 XO right now, and it is not an easy task to do the mod you want to do via the stock binding post. If you want to drive the woofer on its own channel you could get some binding posts that are long enough to go through the cabinet, and attach the woofers wires directly to there. If you were to do this you could also remove, and jumper the 130uf cap (C3) for a huge performance in crease in the mids. Keep in mind if you do this the AVR/Pre/active XO would need the mains set to 80hz. You wouldn't even need the Rane if you are not using a sub with this system.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • Atomic Turtle
    Atomic Turtle Posts: 39
    edited December 2008
    OK, thanks. I do appreciate teh advice. It's pretty clear that it's over my head, though; I don't know enough about electronics to start messing around inside 1500 dollar's worth of speakers with a soldering iron. I'll have to see if I can find someone local to help me with that.

    Meanwhile, though, the setup I was using with the 12s is clearly not working the same way with my 15s. I'm having a hell of a time adjusting the levels on my Rane to get the right sound out of the 15s - I suspect it's because of what you said about the mids running off the same binding post as the woofer. Can anyone with a similar setup make any suggestions as to the best way to set the levels on the crossover? I've been messing around by trial and error for 3 days, and I know I'm just not getting it right. What sounds perfect at one volume level seems totally out of whack if i turn the volume up or down, and I can't figure out what the hell is going on. For example, For example, the only way to get anything listenable out of the damned thing is to set the crossover frequency to around 800 to 1000 hertz, which makes no sense to me at all. There's got to be something here that I'm really doing wrong. I'm actually about an hour away from just taking the damned Rane right out of the line and saying to hell with it, but if anybody has any ideas I'd be grateful to hear them. Thanks.
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  • Face
    Face Posts: 14,340
    edited December 2008
    Atomic Turtle wrote: »
    There's got to be something here that I'm really doing wrong. I'm actually about an hour away from just taking the damned Rane right out of the line and saying to hell with it, but if anybody has any ideas I'd be grateful to hear them. Thanks.
    You're using a active 2 way crossover unit with 3 way speakers, what do you expect?
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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