Cary 805C, How much...?

Does anyone know how much power the current Cary 805C ,with the 845 output tube, puts out into a 4 ohm load.

I am aware at 8 ohms it pretty much delivery close to 50 watts but I heard/read somewhere that its only 30 watts into 4 ohms. Any experts out there who can shed light on
this topic!

TIA