roxio, yes you understood me correctly. Looking at the Primaluna manuals somewhat poor back panel image I mistook that subwoofer output to be an RCA, my bad.
elliottbnewcombjr is correct. The plus does have XLR and RCA Inputs that can be switched to route the signal through a high pass crossover.
The manual doesn't mention that flexibility using the High Level Inputs.
Nor does it mention the use or result of a single high (speaker) level connection. I'm hesitant to suggest connecting one high (speaker) level cable from the integrated to any of the +/- subwoofers inputs since the manual shows only all four high level (speaker) cables connected.
Possibly someone can comment on using a second set of speaker cables coming from the integrated amplifiers speaker outputs to the Velodyne's High Level Inputs (page 17 Velodyne User's Manual)?
Unless the Integrated amplifier is having a noticeable undesirable affect driving your main speakers to there potential there may little or no advantage by using a high pass filter.
In my opinion the ability to use the Velodyne's on board Auto/Manual Equalization, Room Optimization, and Remote settings, would be far more desirable.
Consider the effort it would take to have a proper set of XLR or RCA outputs installed on the Integrated amplifier instead of a single high level output.
The Velodyne Plus possesses outstandingly useful abilities not found in most other subwoofer despite its design being being over a decade old. The Frequency Response and Parameters Screen (page 10,11 Velodyne User Interface Manual) is a huge advancement that should be made familiar to its user.
