oops, didn't know about gain, volume trouble

[raindance]

The Aliexpress shops sometime allow you to choose the basic value of the volume control (25/50k etc).
But I got my preamp used. I guess I could just add two more resistors if I knew where and what value.
I couldn't find the HIFI Audio ZZ-2311V128-1 product/manual.
View attachment 424405

You'd add variable resistors (pots) before the relay volume control, if that's what it is.

 

[Rotel75]

I assume the clone doesn't have this arrangement which explains why you can't find a comfortable volume setting.

There are 4 RCA inputs that share one relay/resistor based 128 step volume control (0.5dB/step).
I guess adding the resistors/pot on the input side would be safer, not to mess with the unknown output impedance.