Not to hijack this thread but I have to respectfully disagree with Bradpaton's opinion in that a sub should strictly be limited to HT. My PMC speakers which utilize Dynaudio drivers are rated at 35Hz but needed a sub to really dig the deep bass notes. No matter how powerful the amp is, the 1.3SE's(as with other small standmounts) are missing out some low bass and it's inevitable with those small drivers. I cannot say for failures in integrating a sub to the mains in 2-channel but if get it right you should be amply rewarded.
Try high-passsing the speakers if you sub allows it. I ran in this configuration and it was successful. Prior to high-passing my speakers, I like you failed numerous times in integrating the sub to the mains when running the speakers full-range, and you are right that it did ruined the sound quite a bit. Others might have better luck though but not in my case.
Try high-passsing the speakers if you sub allows it. I ran in this configuration and it was successful. Prior to high-passing my speakers, I like you failed numerous times in integrating the sub to the mains when running the speakers full-range, and you are right that it did ruined the sound quite a bit. Others might have better luck though but not in my case.