@StandardModel
You are correct — since the RS520 has built-in amplifiers and uses passive speakers, there is no separate balance control available at this time.
The RS520’s internal amplification does not provide an independent left/right balance adjustment through software.
We understand that this can be inconvenient for room acoustics adjustments, and we have forwarded your feedback to our development team as a feature request for a future firmware update.
Currently, as a workaround, you may consider:
-Adjusting speaker placement or toe-in to balance the sound field.
-Using room acoustic treatments (if possible).
-Applying external digital signal processing (DSP) before the signal reaches the RS520 (e.g., via a streaming source or a preamp with DSP features).