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I am looking at using a Crown XTi 4000 or XTi 4002 instead of some SPA-1000s for a sub running 2 cabs (stereo pair with electronic xover), two each LMS-r 15" per cab with independent cabinet space at 225L each, ported low 14.75Hz. I would like to set it up so only one driver is running form xover down to around 25Hz or so and then add the other for deep bass.

Anyone have experience with the XTi 4000 versus the XTi 4002 and have experience with the EQ and settings for low pass filters? I would run the LMS-R's voice coils in series for a 4Ohm load and run two amps for running the high and low drivers separately.
:scratch:
 

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I have used the Xti1000, 2000 ad 4000 but none of the newer versions.

Do you own these amps already?

You essentially have four subs and you want to use two of the subs for the very low octave yes?

If you have any type of Audyssey or other it may confuse or complicate the EQ if having a system like you are wanting. Any reason you are wanting to only use the pair of subs from 25hz and down?
 

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Discussion Starter #4
OK, the response from Crown support is that there is no EQ center capabilities below 20Hz but the Low Pass filter can go down to 30Hz (the point I asked about) maybe 20Hz.
 
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