It is mentioned in TPA6203A1 data sheet as follows.
The input(Ri) and feedback resistors(Rf) set the gain of the amplifier which is recommended to use 1% tolerance resistors or better to keep the performance optimized.
So, could you please share the distribution data for the voltage gain at 1kHz when using TPA6203A1 with Rf = Ri = 20 kΩ?
If there is no distribution data, please tell me the expected distribution(ex. Min/Max value : +/-2 dB).