The software kept losing connection to the PXA-H800. Fix: Do not use a USB 3.0 (blue) port. Force the Alpine driver to use a USB 2.0 port or a USB 2.0 hub. Also, disable USB selective suspend in Windows Power Options.

[Imgur link to my current crossover settings] [Imgur link to the RTA blank screen issue]

Alpine Imprint Sound Manager 2.1.0.0 (Latest) The Issue / The Fix

Troubleshooting / Guide: Alpine Imprint Sound Manager v2.1 (PDX-V9 & PXA-H800)

In v2.1, the "Link" button (for stereo pairing of channels) is now hidden under a right-click context menu on the channel strip. If you can't figure out why your left and right EQ aren't mirroring—right-click the channel number.

Thanks.

Any help on the BT RTA issue is appreciated.