"If we could measure a mic preamp's cholesterol level, then this impressive super-boutique-vacuum-tube-animal from Chicago would be riding the edge of what is allowed in unsaturated fats! I have never experienced this much weight coming out of anything like the m63!  This is an unbelievable musicbox!! Big thanks to Flyline who imported this foreign dreamtool to Switzerland!"

– Patrik Schwitter, Sunhill Project Studio, Switzerland

"The next thing that we cut was the lead vocal -- he was singing into a Neuman U67. We ended up using the Electronaut tube preamp, and the second that we plugged it in to that pre, it was a unanimous decision.
It instantly sounded great, and had an incredible mid-range detail."
– Jonathan Low, Weathervane Project Series [video]

“I love the M63. It is among the best that
I have ever heard, if not the best.”
– Derrick “Drop” Braxton, Grammy-Nominated Producer (Lupe Fiasco's "The Cool")

"The M63 is open and airy – perfect paired with an
RCA BK5 on percussion. Transparent and focused imaging, allowing the mic's natural smearing to come through, but not by being unmusically clear... instead, very harmonically pleasing on it's own."
– James Murphy, DFA Records/LCD Soundsystem

“I love my Electronaut M63 on acoustic instruments, and I love how it flatters dynamic mics. It’s rich and euphonic like a classic tube pre. I had a chance to use the M63 next to a pristine, classic V76, and the M63 held its own.”
– Steve Silverstein,
Freelance Engineer/TapeOp Contributor

“Our first test was with the Blue Blueberry which we
know very well. Plugged it in and the M63 made it sound like a U47! Needless to say we were blown away -- the Blueberry has never sounded so good! We then plugged in a Bock 251. Ouch! @#$%^& Absolutely amazing! I don’t have words, pure magic and a lot of smiling faces.”
– George K, Steve’s Pro Audio, Montreal

“The M63 provided the clearest and smoothest bass response I’ve ever heard. Wonderful for use on
bass guitar, either with a mic or direct. Also,using Coles 4038s with these preamps for horns was the easiest time I’ve ever had getting exactly the sound I wanted.”
– Scott Adamson, Musician/Engineer

“The M63 makes ALL microphones sound great. My U47 has never sounded so good! It is also a fantastic tube DI. It shines on bass guitar and keyboards as it can be overdriven subtley or to an extreme or not at all.”
– Jim Holland, Musician/Engineer/Producer