Do high level sub inputs really sound better?


You guessed it, I'm seriously consider laying out "mo money" for long speaker cables to run my sub via the high level inputs.

I'm currently using the low level RCAs, which seem to sound excellent, but I'm hoping things will get even better using the high level inputs.

Any suggestions and/or experience on the subject would be greatly appreciated.
getheleadout
I've heard that using high level inputs bypasses a stage of gain so the sub's amp runs cleaner. This is of course assuming that the amp in the sub is of lesser quality than the main amp, which is often the case. I have a PS Audio GCC amp with remote volume control feeding my subs- I love after all these years of no bass control being able to dial in remotely how much bass I want per song/LP.
I guess it's obvious by now you're not going to get a definitive answer and certainly not a consensus. With my speakers and sub, an HSU, the high level inputs make for a better integration between speakers and sub and that setup is what was recommended by the manufacturer, even though they make provision for using either high or low level inputs.
SImply put, there are advantages/disadvantages to both. Which tradoffs sound better to you?
I have a Velodyne DD15 and it has it's own remote with volume and 5 presets. I used the microphone room tuning and seldom fool with it.
When you use high level inputs, itdoes not cause your power amp to work any hardr, because the input impedance of the sub is so high, it does not draw much current/power from the power amp. It is as if you had all the power of the power amp in a preamp. Talk about headroom!! (and I do no tknow which would sound better).