Fortunately for us, Peluso Microphone Labs put in the time with several great u-67 specimens and tweaked the p67design til it closely matched the original, creating a mic that holds its own in shootouts with the best of engineer-ears.
The original u67 finds its use primarily on vocals, acoustic guitar, and less often (though no less spectacularly) on electric guitar cabs. I can't really describe with words what it does to the sound, but as this is a blog, I'll try...and you can listen to clips below.
It seemed to be that vocally (clips 1 and 2), it captured about what I'd expected - a nice low end, detailed midrange, and a crispy but not overhyped high end. In terms of high end, I'd put it somewhere between a u47 and a c12 (or for existing Peluso fans, a 2247 and p12). The midrange is where I really sensed something unique. Interesting handling of the critical 400-600 range, and a very unique sounding upper midrange. While the response is spec'd as mostly "flat", we all know the human voice is anything but, and putting several vocalists in front yielded a consistently unique, interesting EQ curve.
The mic was dense in the midrange, with a particular emphasis in the 500 region (a region typically reserved for things that occupy the "front" of a mix), and around the forward sounding 2k region, which would ordinarily yield a very "forward" sounding vocal track, if not for the interesting phasing/compression characteristics. More on this later. There was a high frequency air present as well which began its rolloff somewhere around 8k. In many ways, this is a "midrangey" mic, not boasting the warm, resonating low end and bright, airy high end of the p12. The clips of the acoustic are a great indicator of the low and high end differences (clips 3 and 4).
Most fascinating was the mic's tendency to sound somewhat compressed already, even filtered in a way. Some reading and novice examination of the u67 schematic shows several negative feedback loops, which without getting overly technical, loops the signal back in to earlier parts of the circuit, resulting in phase cancellation at certain frequencies and gives things a very unique color and a somewhat "squished" sound. (The forward, fast, "spanky" sound of a Vox AC-30 is primarily due to its LACK of negative feedback loops. The bloom and compression heard in many Two-Rock amps, particularly the John Mayer signature head, are the result of carefully tuned negative feedback.) The tube only accentuates this tendency toward compression, resulting in a sound similar to fast attack, medium release settings on a compressor...a sound known to push things "back" in a mix. This all comes together to bring us a mic that sounds detailed and forward EQ-wise without being difficult to place into the mix. Given the desire for compressed vocal sounds, it's no wonder 67 microphones are all over modern rock records.
I was most pleasantly surprised when I decided, given its interesting midrange, to try it on electric guitar cabs. No matter what sound came out of the amp, the resulting signal (again through the neutral FMR RNP) had an unmistakable vintage, retro vibe to it, a certain throatiness (due to its handling of the 500hz range) that perfectly accentuated the sounds of a Gretsch ( see clips 5 and 6) or Telecaster.
Needless to say, next time I need to record an edgy or aggressive vocal track or am in need of a vintage "vibe" to my guitar tracks, I will be reaching for Peluso's p67. You can do so as well at Rock n Roll Rentals, for $45 (weekend rate, Tuesday to Monday) or $100 bucks for the month.
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