I'm really happy with my two older SVS Ultra 13 subs with the upgraded plate amps So now I can adjust every sub parameter from my listening chair because of their DSP app that I have on my smart phone No more running back and forth adjusting subs! I have a 2 channel tube stereo rig and 5.2 AV rig I ran the Dirac from my Emotiva XMC-2 to intergrate the subs into my room REW also does a very good job and it's free, but you need to buy a mic
