Users have noted that bypassing certain stock connectors and wiring RCA inputs directly to the board can result in "massive imaging improvements" and a slight gain in volume. Final Verdict
“RS-485 termination resistors are software-switchable.” That’s a lifesaver for Modbus networks.
Below is a detailed datasheet specification text for the Integrated Audio Amplifier Module, which matches the profile of the product line implied by the search term.