66mm Transducer

Designed and manufactured at our lab in Reseda, California, the 66mm transducer lies at the heart of the RAD-0. With our use of a composite diaphragm material, unique circuit design, and array of 11 N52 neodymium magnets, the listener is able to enjoy the most responsive and pleasing sound of any planar magnetic headphone ever built.

Rings

Our goal from the start was to create an aesthetic design worthy of our premium sound. Using materials such as Micarta, stabilized choice woods, rocks, gems, and other unusual materials we can fit into our casting mold, no two rings will ever be the same. The rings are a chance to express your style and personality. Short of concentrated dark matter, if you have a special object that you want casted into a pair of one-of-a-kind rings, visit our custom shop.

Headband

Weight management is always a difficult factor with planar magnetic technology, which is why we pay close attention to the headband. We focus on offsetting the weight with balanced headband curvature, proper clamping force, and perfectly dense ear pads. The result is the most comfortable planar headphone with the smoothest size adjustment design ever created.

Assembly & Testing

While one team works on the rings, another team assembles the headphones in small batches. We “preburn” every pair at 120dB for a minimum of 15 days to ensure they are ready for our listeners to enjoy. The speakers then go through a final round of testing to validate they are within +/-0.3dB for both left and right channels.

Case

For safe transport, every headphone ships in a durable, water resistant “Pelican” style case. Every case has custom cut foam to carry your headphone, cables, and accessories you’ll need for listening away from home.

HEADFONIA BEST HEADPHONE OF 2019

I first listened to the RAD-O at London’s Canjam show and I was immediately hooked. I can’t remember what they were driving it with there but I at home have it hooked up to my Auris Audio Nirvana headphone amplifier, so I can switch back and forth between single ended and balanced.

Because of the link with Audeze, you expect to hear an Audeze style sound when you put it on for the first time, but to me it’s better. Great dynamics and fullness are things we already know, but the natural presentation, air and spaciousness of the RAD-O is something else. The sound stage is wider and deeper as well and as a result you get everything you expected and a lot more.

Full sounding bass with great impact, with the typical planar characteristics. The mids are rich and layered with a natural presentation and especially the treble is lively, energetic, precise and for a planar, quite extended. It’s not a neutral and analytic presentation, but a musical and dynamic one. The musicality and engagement factor is high, and you’ll be head shaking, singing and foot-tapping in no time.

The RAD-0 is a high end headphone for the music-lover and so far we love every bit of it.

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Wer ein hervorragend klingendes und fein verarbeitetes Unikat für den individuellen Musikgenuss sucht, der dürfte um den Rosson Audio Design nicht herumkommen. Für wahre Kopfhörer-Aficionados, denen es allein um den Klang geht, ist der RAD-0 mindestens genauso interessant: Er verbindet den vollen, fast körperhaften Klang großer Magnetostaten mit extrem hoher Auflösung und Präzision. Ausgesprochen verlockend!

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The RAD-0 resonates in the same way the D8000 impressed me in terms of being an absolute riot to listen with for my old rock and modern dance hall anthems. Like the D8000, the RAD-0 is not a reference headphone in the traditional sense. It is tuned for listening and enjoying your music at a very high level. On that score, the overall balance and seductive timbre are just brilliant.

Pair this with a punchy amp and resolving DAC and you get one heck of a presentation with a strong emphasis on a solid but controlled pure planar bass response and slightly intimate mids with excellent vocal performances.

The one thing that stands above all others is just how well Alex has tuned the treble of the RAD-0. Quite a lot of planar headphones deliver uneven treble performances and some overcompensate by dulling it down to avoid peakiness or overtones that upset the harmonic balance. Not so with the RAD-0. It’s treble is both energetic yet wet enough and smooth enough to avoid any accusation that it is peaky, too thin or uneven sounding.

And this excellent treble tuning in turns delivers an excellent instrumental timbre that is both exciting with just enough bass/treble contrast and ‘sweet’ enough for excellent long-term listening potential. I commented in my original CanJam Singapore 2019 report that the RAD-0’s treble sounded better than Audeze’s tuning on the LCD-4 and I stand by that now 5 months later.

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