Recovery stage maths

[Kipper4]

I have in my mind to make a basic EQ/cab sim thing.

I figured a buffer. Probably jfet or op amp for a higher impedance>
Tone stack followed by op amp recovery stage.

By my reckoning (no science involved here or EE knowledge) I'd need a round 20db in recovery after the tone stack.

Quetion is how do I do the math to translate my NFL gain into db please?
Thanks
Rich

[Mark Hammer]

There are on-line gain<->db calculators (I think Jack Orman has one at AMZ), but since  perceived loudness enters into the equation when dealing with EQs, you might want to incorporate a trimmer and season to taste.  I.E., knowing what additional gain you need is not readily deduced mathematically.

[Kipper4]

Who would have thunk.
Thanks Mark good call on the trimmer too.

here it is

http://www.muzique.com/schem/gain.htm

[ashcat_lt]

It's 10 ^ (db/20) in case you really wanted to know.  A lot of folks seem to approximate in code as 2 ^ (db/6), but neither are really very easy to figure by hand, so you end up going to a calculator anyway, so you might as well just use that one above.

[Kipper4]

Thanks Ashcat