Preamp - 18 dB Gain too low?

You have it just right as others have said.

I read several years ago from a well regarded designer that the
"sweet spot" is between 12:00-3:00 o'clock on the dial. This is
where you are achieving near zero attenuation of the signal and getting the
maximum benefit from the preamp. Mine has 20db and sounds superb!

If you like what you are hearing I would not change. Your next step may not
be for the better. Listen first!

Marakanetz- I will defer to your expertise/training.

I will try to find the reference. (It may have been Roger Sanders or Saul Marantz)???

Anyway, It would make sense that as you approach the limit of the volume dial, (lets say it goes from 7:00-5:00 o'clock, Between 12 & 3 quite loud by now!), you are approaching zero gain and not many can let their systems play at full steam without strain or damage to ears or equipment as you mention. The preamp needs to get out of first and second gear to hit it stride. I think I was left to presume that the volume control would sound best when operating in the latter part of the dial.

I have very little knowledge of EE or Audio design other than being a user of such items. I may have completely misunderstood the conversation. Although, I know I have read comments from others stating nearly the same in that their system sounded best with the volume on the pre turned more clockwise. Where that is on any individual dial is another matter.

Do you kind of get what I am saying?...
Mine has 1db detents but will spin forever.