MXL Genesis Tube Mic Audio Comparison by ProAudioStar

About the Recordings: There are a number of competing schools of thought when it comes down to how to design the perfect preamp or microphone shootout. Converters, EQs, compressors and other pieces of outboard gear are fairly straightforward because you can simply run the same sample through each piece of gear you're testing, but mic preamps, interfaces and microphones are a little more problematic. Ideally you want all your competitors recording the exact same source using the exact same ancillary equipment simultaneously, but that's usually impossible. I've seen some shootouts simply mic their monitors playing back the same clip, and while that certainly helps to eliminate performance variables, I don't think it really gives you a true and accurate sense of what a microphone or pre actually does on a given source. So I've opted to simply record three different takes of the same short clip for each given sample, using the exact same settings and gain for guitar, and in this case using the same Onyx Blackjack preamps and converters attenuated to the same gain, and doing my utmost to maintain a consistent performance on vocals. There are definitely some slight variations, but most everything that can really affect the sonic signature – gain, tone, EQ, etc – was kept consistent.

All pads and high pass filters were disabled for all three microphones, and the Sputnik's and rebuilt U-47's pickup patterns were set to cardiod to match the fixed cardiod pickup of the Genesis.

Clean Guitar: This was recorded using an Epiphone Supernova played via a Marshall MG15CDR studio amp and recorded into a Mackie Onyx Blackjack recording interface. All reverb and other effects were disabled, all tone controls were set at neutral, the amplifier's gain was attenuated at 75%, and the Onyx preamp gain was attenuated at line level. Mogami Gold TS and XLR cable was used for all interconnects.

Overdrive Guitar: Same as above, except gain and volume were both set at 50% for the MG15CDR's overdrive mode.

Male Vocals and Spoken Word: Using the same Blackjack interface (with preamp gain set to 30) and Mogami Gold XLR, I sang a clip from Lost Under the Sun, the opening track on my upcoming album, Tears of Men, and spoke a short introduction to the microphone tests.