Rob Watts
Member of the Trade: Chord Electronics
- Joined
- Apr 1, 2014
- Posts
- 3,144
- Likes
- 12,424
I'm not disputing what you're saying, I'm just trying to understand it.
So if 5.3Vrms is at +18dB, then -4.5dBV is approximately the reference. So -70dB is -74.5dBV or roughly 189uVrms. Much more reasonable numbers.
Here's what I'm not sure I understand correctly now, so please check me on this...
From -70 (-74.5dBV approx) to -34 (-38.5dBV approx) it's half dB steps? (2 steps per color change, assuming color change = 1dB)
Then from -34 (-38.5dBV approx) to +2 (-2.5dBV approx) colors change together... So 2dB steps?
Then from +2 (-2.5dBV approx) to +18 (14.5dBV approx) it's 1dB steps? (taken verbatim)
So if I wanted a roughly -10dBV output, I would start at the max volume and click down 16 times to get to about -2.5dBV then 4 more clicks to approximately -10.5dBV.
If I take into account power conditions, maybe I want to aim one click higher and stop at -8.5dBV nominal? Is a 1.5dB drop a reasonable expectation? How stable will that level be?
Yes, I believe the steps are in 1/2 dB increments up to -34, but after -34 it's 1 step per increment, and after +2 it's 2 steps (not sure on this though). I am not the authority on the measurements or implementation. You are asking for figures that I am not qualified to answer accurately, but hopefully I can help point you in the right direction. @Rob Watts.
I do believe he's mentioned the power is very stable throughout the power level, but again, I have no data on this.
Just for accuracy - a change in volume is always in +/- 1dB steps.
Rob