I'm in the process of upgrading my AVR and Subwoofer. I've had my Sony STR-DH810 for going on around 12 years and am finally upgrading to a Marantz SR6012. I'm very excited. I've also purchased a SVS PB1000 with the intention of purchasing a second one in a few months. Until then I have a Polk PSW505 that i'm using just to hold me over. My question is with the stark difference in quality between the two subs, would it be worth my time to us these in a dual sub configuration or should i just use the SVS as a stand alone until i'm able to obtain the second one? Thank you so much for any response you have.