Yes, I see the maximum output in Volts, but that's sure not the Voltage gain.
Something else from the amazingly brief user manual--Input impedance, '47k ohm' (plenty OK), and then Output impedance, '47k ohm'. Really? if so, this preamp would sound horrible trying to drive a poweramp with a, say, 10K-Ohm input impedance. Does anyone who knows anything read these things before they're published? What is the output impedance? I'm hoping for something closer to 47 Ohms.