Alex Rice Vs Metal Marshmallow DIY Phantom Piezo Preamp Comparison

In this video I compare the new Marshmallow DIY Phantom contact mic preamp to a popular DIY preamp that can be found on the internet and in several products such as the Cortado thingy which people sometimes ask me about.

https://metalmarshmallow.com/product....
https://metalmarshmallow.com/product....

I forgot to say in the video that there is a popular misconception in the audio community that JFETs will solve all of your noise issues. This experiment clearly disproves that, as noise is in fact a much more complicated issue. I also see a lot of people simulating preamp designs, which also never models noise properly, so experimentalists for the win!!

0:00 The Contenders
2:05 Experimental Setup
3:34 Alex Rice: White Noise Signal
4:25 Alex Rice: Noise Floor
5:38 Swapping the preamps
6:21 Gain Comparison
7:43 Marshmallow: White Noise Signal
8:16 Marshmallow: Noise Floor
10:28 Audio Interface Noise Floor
11:04 Noise Floor Comparison
12:28 Is It Better Than Nothing?
13:12 Non-DIY Contact Mic Comparison
14:15 Should You Trust Me?