Bass/speaker excursion issues

This issue happens in very few tracks, and never on all tracks on one CD.  It's pretty alarming to see how far the drivers go in and out.

Russ69: no I haven't. 

Elliot: typo:  Hsu, not Shu subs

Elliott : the manufacturers is Shu. I use two subs. They have 15" drivers and 650 watt amps (1000 watt short term max) . 

Erik: Sealed boxes, no ports. 

Dit usa: I have Aeriel 10T speakers, 11" drivers in ported bass only cabinet. The subs (I use two) are Hsu Research. They use 15" drivers in a sealed box. The internal amps are 650 Watts with short-term peak of 100 watts.

Ditusa: 60 hz

Highend64: ULS-15

Erik squires and ditusa: I have been running the main speakers full range and trying to slide the subwoofer bass frequencies under what the main speakers are capable of. Using a meter and test disc it seems as the mains start falling off at 60hx (but still have a meaningful amount of lower frequencies below 60 hz). I did this as I absolutely love the sound of the main speakers and want to have there precense involved as much as possible. But I can note that when the speakers do the low frequency large Excursion it does it on the main speakers as well as on the subwoofer.

I'm wondering if I just need to find some kind of device that will filter out super low frequencies? I do have a DSPeaker Dual Core which is a DSP device used to integrate Subs in the main systems. It worked well with my previous amplifiers(Cary V 12's) but with my current amplifiers (Parasound JC 1+ mono blocks) it seems to detract from the sound overall.

But..... even with the DSP in place with the previous amplifiers, the carry amps, it still did the large Excursion thing. And again it's only on a few tracks that have really low base.

Maybe I should just be grateful for the great sound I get on 99% of the music that I listen too and press skip I know that have this anomaly.

Erik squires: in order for me to try that I think I would need to do one of two things? One would be to have a DSP device to help divide the frequencies going to the speaker and to the sub? The other would be to run speaker wires directly to the subwoofer and then run another set of speaker wires from the subwoofer to the main speaker? Or are there easier ways to do this?