I'm starting to get quite confused by all this.
I currently have just one lead, a Mark Grant subwoofer coax phone cable, connected to the line level input of my sub. I would like to improve integration for music, because my sub is not ideally placed, being in the corner, down the side of the sofa, on the opposite wall to my fronts. It's probably not only a case of positioning, because sometimes I don't notice localisation but can still annoyingly distinguish the sub from the front speakers in the way of two obviously seperate beats/rythms emerging, even though they are pretty much in time.
If I wanted to try my sub hooked up at speaker level for stereo use, how would I do this? Would I need to run four wires from my amp, connected to the same terminals as the front speakers? And if this was the case, would regular speaker cable be ok, or should I be using similar stuff to that used for the line level sub input ? (by the way, I originally purchased the Mark Grant screened coax cable to overcome a permenant hum, which thankfully worked).
In this scenario, what's to stop frequencies lower than the cross over setting on the sub from going to the fronts as well? The cross over setting on the amp wouldn't work, would it, since I'd be needing to use pure direct mode? In which case, how would the cross over setting on the sub filter things out to front speakers connected in parallel? I'd really want to prevent low frequencies overworking the amp/satellite link and distorting the image.
If I used a different mode to pure direct, say 'straight' for example, then wouldn't the amp then be sending a signal at line level and speaker level simultaneously, and therfore confound the image at teh very least? Similarly, in the above set up, when I wanted to watch movies or play SACD wouldn't the amp be trying to use line level and speaker level simultaneously?
Perhaps the only option would be to use a seperate stereo amp for stereo music, connected at speaker level, and the AV amp connected at line level for movies, SACD, and prologic II music?
But even then, with a stereo amp, if Iconnect speakers in parallel with the sub at speaker level then how would the crossover come into effect? And even if it could, would this not deteriorate the performance of the AV amp for it's SACD, prologic music, and movie duties since the manual gives a claer instruction to set the sub crossover knob at the max, and let the amp do the work?