Regarding the Encore X RCA Outputs Full Range vs Filtered (Crossed Over)

The Encore X provides a total of 6 x RCA outputs as follows:

Front RCA x 2 (Left & Right)

Rear RCA x 2 (Left & Right)

Sub RCA x 2 (Left & Right)

The outputs of all RCA outputs are configurable by software and can output as full range or filtered (crossed over).  

However, the high-level speaker outputs are tied to the Front and Rear RCA outputs. This means that any filters applied to the speaker outputs are also applied to the RCA outputs for the respective channel.

For example, the ENX-T106 has Beat-Sonic preset tune with filters applied to Front L & R and Rear L & R. Any additional amplifier connected to these RCA outputs will have these same filters applied. Of course you can go into the ENX software settings and set all the outputs to full range but these will completely change the DSP sound file for the GR86.