MRC01's latest activity

When I explained this to my Mom, I told her a dB is a ratio from comparing 2 values. If A is 26% bigger than B, that is 1 dB (power). If...

I'm listening to the recording on Primephonic and find the sound quality to be excellent. Very well recorded. Mendelssohn in general has...

It's unusual for classical music to overdub like this. Neat stuff about the recording method, the instruments used, etc. And just...

0 dB is not total silence. It is a reference point of loudness or amplitude. Total silence is not possible, since air molecules are...

Ah, loudness versus amplitude. Two different things, and another common point of confusion.

Where is halving 13 times coming from? -130 dBV is halving 21 times. Halving 13 times is only -78 dBV. In the pizza example I think...

How many times you halve it is not intuitive; it shrinks much faster than most people's intuition predicts. That said, -130 dBV is a...

For 10 dBV, 20*log(R) = 10, so R = 10^(10/20) = sqrt(10) = 3.16. So 10 dBV is 3.16 times more voltage than 0 dBV. Example 1: suppose...

UPDATE! As I said yesterday, I was going to listen LCD2 and TH900. I did. TH900 was overall better than my HD558 / HD600. Bass was deep...

Speaking of bases, I've always thought we should express the frequency axis in log base 2, since that matches our perception. However...

The take-away is simple: use 20*log(R) for most of the specs that Amir publishes for DACs & preamps (SINAD, THD, IMD, etc.). Every...

I know you understand this, but dbV is not a thing (but dBV is!). Neither is "dbP". The scaling factor simply changes from 10 to 20...

That is incorrect. A dB for measuring voltage is different from a dB for measuring power. This is often confused. Correct. If there...

That's true for a dbP, but not for a dbV. Most of the specs that Amir measures here are voltage, where every 10x change is 20 dB. For...

Is your brother a tree? First, remember that there are actually 2 different "sizes" of dB: for power, and for voltage. Each has a...