Just arrived today so I wanted to give it a quick run to test it out. The CL-2 is an inline gain boost for mic level signal that touts that it has no series resistance so as to not increase noise. The box gives a passive (don't kill me for word choice) 20-25dB boost and runs on Phantom power. It supposedly does two things: a. shows dynamic/ribbon mics the "correct" impedance that they should see to produce maximum quality sound and b. buffers and amplifies the signal for higher S/N and for quiet source recording so you can run your pres lower and still get higher fidelity. Condensers would not need something like this unless they need a clean gain boost seeing as how condensers have similar circuitry built into them. Plus it has JFETs in it, and if you know me, you know how much I love JFETs! I bought it for a ribbon microphone that I just ordered, but I also use dynamics on a regular basis, so I figure it's never a bad thing to have around so long as it sounds good. Testing will determine that... The guitar rig is not setup at the moment so I decided to do just a quick vocal test instead. This is not the most scientific test due to the nature of vocal recording and all the variables that affect the tone, but I still think it's neat. Sorry it's not awesome brutal tones yet, I'm working on it... There are three recordings, bare mic through a 15' cable straight to the preamps of my M-Audio Profire 2626, mic through a 15' cable to the CL-2 then through a 3' cable into my Profire, and mic through a 3' cable to the CL-2 then through a 15' cable to my Profire. Basically just giving it the runaround, what I hope to do by this test is determine whether the impedance loading effect of the unit is lesser or greater than the buffer effect. Here I'm just using some of my favorite vocal dynamics: I'm going to perform the test again when I get my ribbon mic in a week or so.