Well a few things
I owned the Crowns, and the Odysseys on this setup.. Forget the Odyssey, it is a very bad match, the high damping of the amp does not mate well with low exersion, high damped pro audio drivers at all. The crown is not half bad, good mix because you have to remember something "Impedance" is the killer matching your PRO Rane EQ to an amplifier, not only the impedance match but the fact do you really want to convert over from Balanced operation with the XLR to an RCA adaptor? Not recommended in my experience with these kinds of active setups. Also by the way the Odyssey is NOT a true balanced input on those amps, its just single ended with a ground jumper to the #1 and #3 pin, which are also wired OUT OF phase to the U.S. XLR balanced gear, so you would have to actually go into the amp and re-solder them to match the phase of the Ranes XLR.
Anyway forget all that because your not going that route anyway. I could Highly suggest the Mccormack DNA series for a good price, however I have not specifically heard it in this application, and once again you will lose the GAIN of at least 6 db due to they are not balanced power XLR, this also can increase distortion, and the IMPEDANCE of the Rane matching possibly I think the DNA 1 is also a problem with its only 10k input impedance. Also that is the other issue of the Odyssey amps, they are VERY low impedance at like 10k ohms thats excessively low for a lot of preamps or processors to drive depending especially for low frequency alone, I learned that the hard way! Get an amp with 20k ohm or better input and true XLR balanced operation in my opinion Thats why the crown in the end made most sense for the money, they are about 40 k XLR impedance, and have plenty of power, run quiet, and are very Rugged for this duty.
In the end however Zu's very own new Plate amps in the Zu DEF II's which of course now cost much more were the ultimate solution that beat all the PRO setups I went thru. Not that it was just the amps, but the full package setup has changed significantly including enclosure materials, split tunning internally etc Eliminating all the issues with the pros.
So I hate to say it, but go to parts express and buy 2 of the better Subwoofer plate amps for 100 or 200 each, run them as mono blocks in their own wood enclosures if you wish, and you can even run them without the Rane unit for far less complications and use the EQ controls right on them.
Also these plates have way more than enough power, MAYBE Zu will sell you a pair of their new Hypex amps they use in the presence model currently with a standard input to run your Rane to them for control. But if you want pure pro capabilities its gonna take some serious work to get the Rane tuned in correctly and a good matching amp.
Good Luck
P.S. Don't just buy any old PRO audio amp either, get the CROWN K1 Or K2 as mentioned, they run cooler, and Have NO FAN! You will kick yourself buying a cheaper 200 dollar pro amp with a loud fan running all the time in it. Or try one from a local Guitar center at first at least and see what you think.
Finally I also believe running the Pro's with a crossover on the Rane at the 100 to 120 hz is better due to the mid bass much stronger even though its a large overlap to the front drivers... Only way to get the lower 40 hz to 80 hz sounding as good is a lot of room treatments, or the Split tunned Zu Def II models.
By the way if you do go with a better quality Audiophile style Single ended/RCA amp, I MIGHT have the custom XLR with Locking RCA's on them still I could send you for cheap. They are only about 2 feet long I think though, maybe they are 1 meter.. Also I had a pair made by Zu as well, but they are not there. All a XLR/RCA cable are is the center pin "Red, Hot" on the RCA goes to the #2 pin on the XLR, and the #3 and #1 pins on the XLR Are simply combined as one ground, which is just the single ground wire off your RCA jack.
Anyway forget all that because your not going that route anyway. I could Highly suggest the Mccormack DNA series for a good price, however I have not specifically heard it in this application, and once again you will lose the GAIN of at least 6 db due to they are not balanced power XLR, this also can increase distortion, and the IMPEDANCE of the Rane matching possibly I think the DNA 1 is also a problem with its only 10k input impedance. Also that is the other issue of the Odyssey amps, they are VERY low impedance at like 10k ohms thats excessively low for a lot of preamps or processors to drive depending especially for low frequency alone, I learned that the hard way! Get an amp with 20k ohm or better input and true XLR balanced operation in my opinion Thats why the crown in the end made most sense for the money, they are about 40 k XLR impedance, and have plenty of power, run quiet, and are very Rugged for this duty.
In the end however Zu's very own new Plate amps in the Zu DEF II's which of course now cost much more were the ultimate solution that beat all the PRO setups I went thru. Not that it was just the amps, but the full package setup has changed significantly including enclosure materials, split tunning internally etc Eliminating all the issues with the pros.
So I hate to say it, but go to parts express and buy 2 of the better Subwoofer plate amps for 100 or 200 each, run them as mono blocks in their own wood enclosures if you wish, and you can even run them without the Rane unit for far less complications and use the EQ controls right on them.
Also these plates have way more than enough power, MAYBE Zu will sell you a pair of their new Hypex amps they use in the presence model currently with a standard input to run your Rane to them for control. But if you want pure pro capabilities its gonna take some serious work to get the Rane tuned in correctly and a good matching amp.
Good Luck
P.S. Don't just buy any old PRO audio amp either, get the CROWN K1 Or K2 as mentioned, they run cooler, and Have NO FAN! You will kick yourself buying a cheaper 200 dollar pro amp with a loud fan running all the time in it. Or try one from a local Guitar center at first at least and see what you think.
Finally I also believe running the Pro's with a crossover on the Rane at the 100 to 120 hz is better due to the mid bass much stronger even though its a large overlap to the front drivers... Only way to get the lower 40 hz to 80 hz sounding as good is a lot of room treatments, or the Split tunned Zu Def II models.
By the way if you do go with a better quality Audiophile style Single ended/RCA amp, I MIGHT have the custom XLR with Locking RCA's on them still I could send you for cheap. They are only about 2 feet long I think though, maybe they are 1 meter.. Also I had a pair made by Zu as well, but they are not there. All a XLR/RCA cable are is the center pin "Red, Hot" on the RCA goes to the #2 pin on the XLR, and the #3 and #1 pins on the XLR Are simply combined as one ground, which is just the single ground wire off your RCA jack.