So I have 2 MC cartridges I am trying to calculate the real output db difference on output not the final voltage.
I have used the gain calculators, and tried converting, but not getting the results.
1st cart. is going to be a .3 mV thru a 60 db phono amp, which equals - 300 mV output, or less than a half volt when amplified hitting the main preamp.
2nd cartridge is a .65 mV going thru the 60 db phono amp which equals - 650 mV output or just over a half volt.
What should the perceived db difference be here? Half the power cart. should be what? About 3 db weaker, 6 db weaker, 9 db weaker?
I am trying to get a reasonable ballpark difference in real sound output because it will cost a pretty penny to get the low output cart. Re-tipped in this case.
I need about a 5 or 6 db system drop because the .65 mV cart. does have a little to much where the Preamp volume does not allow a lot of "Travel"... I have plenty of gain overall no doubt so I want to make sure to get a good solid "Softening" of the volume acceleration using the lower output cart. if I have to spend to get it tipped.
Obviously I can't just test it to find out because I don't have another working low output to test this before sending it out and spending on it and then finding out I don't truley solve the issue.
I am sure it will drop a bit, I have had many before, just not sure in this case it will be MUCH of a drop even with half the power going into 60 db.
If I only shave it barely with 1 or 2 db then I might have to take a a different approach here instead of trying to drop the cart. power back.
Thanks for the help guys, I just can't find the right calculation or way to convert online with this metric.