Using 2 spectrums is pretty cpu intensive I've found, well I both Spectrum Analyzer Peak Band Slider and normal and noticed a huge jump in cpu usage. It's worth testing for sure.
Check out my mld skin in the pre release section, it has a spectrum in there, all you need to do is clone the group and rename each of the layers to use tb for top to bottom.
You need to use specbandbt(x) for the main and for the reflection use specbandtb(x)
someone might help you with that but I won't, I've given u the simple keyword structure and an example psd. You want us to do it for you? not gonna happen.
you'll be waiting a long time, you've got a working example in my mld skin and the layer references, it's not rocket science, it's pretty straightforward.
here is a simple skin which contains ONLY spec analyzer layers doing what has already been described. there is a great deal of consistency in the way Xion approaches all of its skinnable elements -- if investigating this skin (and others) does not answer whatever questions you have, you will likely also wrestle with many of the other features.