Arcam AV41 and PA720 gain

[truwarrior22]

I have an Arcam AV41 and PA720. I moved from RCA single ended to XLR, but it seems the volume is pretty much the same when testing levels from the menu and when listening to content. Does this mean the gain on the amp is lower for XLR connections? Below are specs. Apparently, they rate sensitivity for 1/2 the power, i.e. 50 watts instead of 100 watts?

Continuous power output at 0.2% THD per channel
Seven channels driven, 4Ω / 8Ω, 20Hz – 20kHz 140W / 100W
Five channels driven, 4Ω / 8Ω, 1kHz 175W / 110W
Two channels driven, 4Ω / 8Ω, 1kHz 225W / 140W
Harmonic distortion, 80% power, 8Ω at 1kHz 0.002%
Inputs
RCA Type XLR Type
Input sensitivity 50W / 8Ω 800mV RMS 1.6V RMS
Signal/Noise ratio (A-wtd) 50W / 8Ω 105dB
Input impedance 10kΩ
Frequency response 20 - 20kHz +/-0.05dB
General
Mains voltage 110–120V or 220–240V, 50–60Hz
Power consumption (maximum) 1.5kW
Power consumption (idle, typical) 90W (Thermal dissipation approx. 340 BTU/hour)

https://www.arcam.co.uk/ugc/tor/PA720/Specification%20Sheet/PA720_Spec.pdf

 

[staticV3]

The PA720 has half as much gain with XLR in, to compensate for the twice higher output voltage of XLR out:

 

[truwarrior22]

The PA720 has half as much gain with XLR in, to compensate for the twice higher output voltage of XLR out:
View attachment 415263

Got it, that makes sense. The processor is providing a higher voltage signal, so the amplifier doesn't need as much gain to reach the desired volume level. I believe the gain is around 31 dB when using RCA single-ended connections.

The PA240 has a switch for 25 dB and 31 dB gain. I wonder if these values apply to RCA connections, meaning you would subtract 6 dB when using XLR connections?

 

[staticV3]

I believe the gain is around 31 dB when using RCA single-ended connections.

Indeed:
20*log10(sqrt(100W*8Ω)/0.8Vrms)=30.97dB