Wow 14db that's really low. Something is very wrong.

Running out of ideas.

I'm wondering if you have some sort of noise source somewhere or a bad input.

Try this.

Plug the Mic in. Select that as the Source. And talk into it.

Bring volume up gradually. just below feedback level.

Does it sound clear? Any Hum? Any static?
Compare it to the opposite channel (L vs R).

Watch out for feed back when your doing this!!
You can blow a tweeter in a blink.

Do you have an analog source you can try on that input?

Did you read the wiki page there are other things to try there.

What range is the meter reading during the pink noise from MRC? I believe it should be around 87 (i.e. on the 90 scale needle should be just left of center). I'll try to double check if nobody else can confirm.

- Fiddler (IMHO)

If you think listening to music is fun, try learning an instrument.
HT: G61RSL, 4x5K, 5.5KHC, 2xSC6000, Transporter, HD621, Philips BDP7501 4K, Tivo, 65" LG OLED 4K C6
Computer: Foobar2000, 5K, Mojo, HiFiMan HE1000 V2