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How do I go about bi-amping Martin Logan Ascents

I am way new to this topic, and have no idea what I need, but would like to try this experiment. I am curently running the Logans with a Threshold 300 Stasis II. I also own a Mac? I believe 150 power amp I would like to work in the system. I am also using now MIT 4 9.9 Enhanced Image Bi-wire. If the experiment didn't cost me much I would like to throw the Mac. in I hear this could make a real positive difference.
*Do I need a external x-over?
*Do I need new ICs?
*Do I need new Speaker Cable?
*Is this whole thing just dumb?
I'm new here be gentle. Take a look at my system in "Ever Evolving"
trumpetdoug

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swampwalker
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*Do I need a external x-over?
*Do I need new ICs?
*Do I need new Speaker Cable?
*Is this whole thing just dumb?
1. Yes. This will require extra i/cs
2. If your pre has dual outputs you will need a second set. If your pre does not, you will need Y cables.
3. You will need 2 sets of single-wire speaker cables.
4. Dunno. Add up the cost of 1-3 plus the value of the 2 amps. Maybe could be better put to use buying a single better amp OR sell one of the amps, get a second to match the one you kept. Then you could eliminate the cost of a cross-over.
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