Left and right subwoofers with integrated

Hello tony1954,

     Yes, you would need two y-adapters, one for the left channel and one for the right.  You may also could check the SB 2000 manual and see if it's possible to connect the l+r channel pre-outs on the MF integrated to sub#1's l+r channel inputs and then piggy-back sub#2 to sub#1 via l+r channel outputs on sub#1 connected to the l+r channel inputs on sub#2.  This would also result in both subs receiving identical signals just as dual y-adapters would.  I'm just not sure if the SB2000s have this ability.
     I still believe that precise locating of each sub in your room, and in relation to your listening seat, are the primary factors in achieving optimum bass performance in your system.  I used the 'sub crawl' method to sequentially locate the 4 subs in my room and it proved to be extremely effective.

Later,
 Tim

@noble100 
Tim. That would be my preference, but I was trying to avoid running dual cables between the two subs. I have talked to SVS, who were very helpful by the way, and I think I will be just running a single cable to the right/LFE line input on each sub for now and see how that works. If bass is non-directional and monaural below 50Hz, then the SQ will more dependent on the sub placement than the signal.

Hello tony1954,

        Yes, bass below about 80 Hz is non-directional and monaural.  I think you're plan is good but I'm just concerned about whether or not frequencies above 80 Hz may also be sent to the subs and be reproduced.  I'm not certain but I believe the LFE inputs on the SVS subs have no filtering at all, which means your subs might reproduce frequencies above 80 Hz and you would be able to localize these as coming from the subs.
     If SVS can't clarify this issue, then you would likely need to try this setup to find out for yourself.

Later,
 Tim

@noble100
Tim,As below, I have been assured that the low pass filter will always be functional regardless of which way I go."On our subwoofers, running the RCA into the LFE port doesn't disable the ability to use the Low Pass Filtering Functionality. Actually running to any of our subwoofer's ports doesn't disable the ability to use LPF.
So, feel free to just plug one RCA into the LFE port of each subwoofer and back to the pre-outs of your integrated amplifier. Then just adjust the LPF accordingly."

Hello Tony,

    That's okay but you still have the issue about whether 50 Hz is going to be the optimum crossover setting for your main speakers.  I tend to think the optimum crossover freq would be closer to 40 Hz but you should check it out and make up your own mind.  If 50 Hz is not low enough , I'd ask SVS why the heck did they make a sub with a rated bass extension down to 20 Hz and limit the crossover to 50 Hz. 
     Then listen to their lame excuse and buy a Mini DSP to rectify their mistake and solve your issue.

Later,
Tim