I’m Jamey Warren. I measure headphones on my own bench, publish the results at full resolution, and build audio tools alongside that work: an app that tunes your headphones by ear, the software I measure with, and plugins for mixing.
NOWWARREN LABS · I BUILT CALIPER, THE BENCH SOFTWARE I MEASURE WITH AUTHORTHE ART AND SCIENCE OF HEADPHONE DESIGN 2012–2017HEADROOM, PRESIDENT AND CEO 2003–2007HEADROOM, SALES TO VP OF OPERATIONS 1997–2001GRACE DESIGN, EMPLOYEE #1Tune your headphones by ear.
Attune plays your own music, loudness matched, and asks which of two tunings you like better, so you find your sound by ear. Or hear another headphone’s tuning on the pair you own, then shape the rest with a parametric EQ or Fix by ear. One saved sound is free and stays free. Pro is a one-time unlock, not a subscription.
Headphone measurement for Mac and iPhone. It measures a headphone on an acoustic fixture and tells you how much of the curve is real. It is the software this bench runs on.
An audio measurement instrument. It measures its own noise and distortion first, then reports every reading against that floor.
Headphone correction and crossfeed for your DAW, built on the same correction engine Attune runs on.
Beta: includes every update through 1.0. Try any of them free first.
EQ moves tonal balance and nothing else. It won’t buy you resolution, soundstage, lower distortion or different driver physics, and nothing on this page says otherwise.
Because I wrote the method down and you can check it. A measurement you can’t audit is just a picture of a line.
A miniDSP EARS Pro with per-unit serial-matched calibration, using the IEC 60318-4 couplers that the industry rigs use. It is a house reference rather than an industry reference coupler, and I label it that way.
I adjust the headphone for seal and for sound, the way you would settle in to listen, rather than dropping it on at random. You don’t listen at a random seating, so I measure the good one and then show I can find it again.
I publish my measurements at full resolution under CC BY-NC 4.0, labelled with the rig that took them. See the measurements.
I measure your unit on the EARS Pro, seated for best fit, and send it back within about five business days of arrival. Unit variation is real, and the curve of your own pair is exactly what Attune turns into a personal tuning.
I was the first employee at Grace Design. I started there building cables and finished as production manager, bringing products from prototype into production. At HeadRoom I joined in sales and held virtually every role in the company over three separate stints, finishing as President and CEO and leading the company through its final chapter. Now I run this bench in Livingston, and I built Caliper, the software it runs on.
A technical book on transducer types, acoustic design, measurement, and the tradeoffs behind headphone voicing decisions.
ON AMAZON ↗Everything I learn about building headphones, given away: an open reference manual and build guides for a pair you make, tune and service yourself.
MAKERPHONES.COM ↗Tell me what you’re working on and roughly where it is: a headphone you’d like on the bench, a question about a curve, or something you’re building. It all comes to me.