If you don't have a strong background in electrical theory and the associated mathematics then it will take you much more time to learn enough to understand the Audioholics article linked.
For example, when you see the formula: Voltage Gain (Av) in dB = 20 * Log (Vout/Vin)
To understand what that is about, you can Google dB and Log, and find the following information:
https://en.wikipedia.org/wiki/Decibel
"The
decibel (
dB) is a
logarithmic unit used to express the ratio of two values of a
physical quantity. One of these values is often a standard reference value, in which case the decibel is used to express the
level[a] of the other value relative to this reference. When used in this way, the decibel symbol is often qualified with a suffix that indicates the reference quantity that has been used or some other property of the quantity being measured. For example,
dBm indicates a reference power of one
milliwatt, while
dBV is referenced to 1
volt RMS.
[1]"
Then you Google logarithmic and find:
https://en.wikipedia.org/wiki/Logarithmic_scale
"A
logarithmic scale is a
nonlinear scale used when there is a large range of quantities. Common uses include the
earthquake strength,
sound loudness,
light intensity, and
pH of solutions."
For more detailed information on "logarithsm" read this:
https://en.wikipedia.org/wiki/Logarithm
The "log" (short form of logarithsm), in that formula is to the base of 10, again, the linked article above explained what that meant.
If you search hard enough, you may be able to find articles that gathered up most of the information and definition you need. Otherwise it is indeed a time consuming thing to search out all the information individually yourself.
You may also be able to find articles that tried to explain everything you need to know in non technical kind of language that most people can get the general idea.
In any case, there is always the chance that you may come across information that are simply incorrect, it's the internet after all.
