Evolution of the MK-319 Mod from Michael Joly Engineering
Lower cost, better-than-new sound

Elegant, low parts count, single-transistor / transformer topology


Michael Joly Engineering "nU-319" modification for your mic

Listen for yourself, here's the proof -
Hear the "nu-319" in action against the legendary U 67.

There are five paired sound files below. The left-hand file is the U 67, the right-hand file is its nU-319 pairing. In all cases, the recordings were made with both mics live, mics positioned vertically in headbasket-to-headbasket orientation, Daking 500 series preamps for both channels. Vocal distance apx 10", guitar distance apx 18". This is Michael Joly writing. Listen and read more to learn if the nU-319 is right for you. Then place an order or click "contact me" to send your questions.

Btw - The U 67 (about $8000 used) topology is based around the Neumann K67 capsule followed by HF de-emphasis in a tube / transformer-coupled circuit. NOTE: As a FET / tranformer-coupled mic, the nU-319 is not a U 67 clone. Rather, I have chosen this classic mic as reference standards to showcase the qualities of the nU-319.

SOUND FILE: Female Vocal, U 67 | SOUND FILE: Female Vocal, MJE nU-319

SOUND FILE: Male Vocal, U 67 | SOUND FILE: Male Vocal, MJE nU-319

SOUND FILE: Male Vocal, loud, U 67 | SOUND FILE: Male Vocal, loud, MJE nU-319

SOUND FILE: Acoustic Gtr, finger style, U 67 | SOUND FILE: Acoustic Gtr, finger style, nU-319

SOUND FILE: Acoustic Gtr, strummed, U 67 | SOUND FILE: Acoustic Gtr, strummed, nU-319

MJE-K47H Frequently Asked Questions

Q: Is this a complete, mod'd mic I'm buying?
A: NO. THIS IS A MODIFICATION SERVICE TO A MIC YOU SUPPLY. The picture shows a typical nU-319 modified Oktava MK-319.

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"Michael Joly has quickly gained a reputation for ironing the wrinkles out of (an) inexpensive microphone, at a "Bang-for-the-buck" price most of us can easily afford...I was blown away by the exponential difference in quality"

Andrew R. DeLapp, Tape Op Magazine, May / June 2007

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Premium Electronics

The Michael Joly Engineering Premium Electronic upgrade features a great-sounding, low noise Field Effect Transistor (FET) impedance converter or "front end". The FET I've selected for this application has fast transient response and impressively low self-noise - the already low self-noise centered at 150Hz actually declines another 15dB in the critical 2kHz-4kHz band where we are most sensitive to noise. Recordings made with your MJE nU-319 mic will have great clarity, definition and reach without the noise-based graininess that plagues many condenser FET microphones.

And this suite of upgrades includes all the signature Michael Joly Engineering innovations like: capsule isolation-diffusion mounting for "bonk reduction" and reduced vertical standing wave interference, capsule resonator modification for clearer high end and elimination of low cut and roll-off circuits to eliminate stray capacitance losses that rob detail.

Easy to order a risk-free mod for your mic that sounds better than a new stock MK-319!

Get 100% of the stock PC board components and the circuit topology upgraded - click "Add to Cart" to purchase the MJE nU-319 mod for your mic. Questions? Just click "Contact Me" - best, Michael