RAD-0
- Driver
- Planar magnetic
- Enclosure
- Open-back
- Weight
- 550 to 615 g
- List
- $2,600
A 66 mm planar designed and built in Reseda, California. Every pair is burned in at 120 dB for at least 15 days and matched to within 0.3 dB, and the cup rings are cast to order in Micarta, stabilised wood, stone or gems.
Rosson's online shop is offline and retailers list it on a waitlist only. Current alternatives are listed below.
Where to buy
List $2,600
None of the boutiques we track list this model right now. Manufacturer page: rossonaudiodesign.com.
Retailer prices checked 2026-10-21. We may earn a commission on purchases. How this works
Title block
- Maker
- Rosson Audio Design
- Model
- RAD-0
- Made in
- United States
- Released
- 2019
- Transducer
- Planar magnetic
- Enclosure
- Open-back
- Driver
- 66 mm
- Weight
- 550 to 615 g
- Impedance
- 29 ohms
- Sensitivity
- 98 dB SPL
- Frequency response
- 20 Hz – beyond audible range
- List price
- $2,600 USD
Drive requirements
Match an amplifier in the synergy calculator| Level | Power | Voltage | Current |
|---|---|---|---|
| 100 dB | 1.58 mW | 0.21 V | 7.39 mA |
| 110 dB | 15.8 mW | 0.68 V | 23.4 mA |
| 120 dB | 158 mW | 2.14 V | 73.9 mA |
Most headroom at 110 dB
- ampsandsound Bigger Ben (Rev 3, 2026)+31.7 dB
- HeadAmp GS-X mk2+27.7 dB
- Woo Audio WA33 (2nd generation)+27.6 dB
Rated 98 dB/mW into 29 ohms. Estimated from published amplifier output.
Assembly drawing
Parts
- 1HeadbandThin padded synthetic/protein leather strap on metal band (reviewers)
- 2YokeMatte black aluminum gimbals (Headfonics review)
- 3GrilleMetal front grille with center logo, Flower-of-Life-style pattern (aluminum per Headfonics)
- 4Ear cupCast resin ring in chosen material (Micarta, stabilized wood, stone, gems) on metal cup
- 5Magnet arrayArray of 11 N52 neodymium magnets
- 6DiaphragmComposite diaphragm material (not further specified)
- 7EarpadsPU/protein leather outer, velour inner, memory foam (reviewers)
Schematic planar magnetic assembly, annotated with the Rosson Audio Design RAD-0’s published materials. Not to scale.
Engineering notes
- 66 mm planar transducer designed and manufactured at Rosson's lab in Reseda, California
- Composite diaphragm with a circuit design and an array of 11 N52 neodymium magnets
- Every pair pre-burned at 120 dB for at least 15 days and tested to within +/-0.3 dB left to right
- Rings cast in customer-selected materials such as Micarta, stabilized wood, stone and gems
Design language
Bespoke detailing: cast rings in the material you choose, a patterned metal grille and matte black aluminium gimbals.
Build the listening station
Desktop sanctuaryAmplifier
Woo Audio WA22 (2nd gen)
Anodized aluminum chassis, PTFE tube sockets, ALPS RK27 pot
from $2,699
stand
Grovemade Wood Headphone Stand
American walnut, veg-tan leather, 304 stainless steel, cork feet
from $220
cable
Moon Audio Silver Dragon
UP-OCC silver with Kevlar, Teflon insulation, Cardas silver solder
from $825
Current alternatives
Planar magnetic
$3,499.99
Caldera
Aluminium, Wood, Leather
- Enclosure
- Open-back
- Drive
- Easy drive
- Weight
- 490 to 550 g
Planar magnetic
HIFIMAN$6,000
Susvara
Wood, Leather, Engineered films
- Enclosure
- Open-back
- Drive
- Demanding
- Weight
- 450 g
Planar magnetic
Abyss$5,995
AB-1266 Phi TC
Aluminium, Stainless steel, Leather
- Enclosure
- Open-back
- Drive
- Moderate drive
- Weight
- 640 g
Planar magnetic
Abyss$4,995
Diana TC Signature
Aluminium, Leather, Glass
- Enclosure
- Open-back
- Drive
- Moderate drive
- Weight
- 369 g
Sources
- headphones.com/products/rosson-audio-design-rad-0
- rossonaudiodesign.com/about
- rossonaudiodesign.com/faq
- headphones.com/blogs/reviews/rosson-audio-design-rad-0-open-customizable-planar-headphone-review
- headphones.com/blogs/reviews/rosson-audio-rad-0-review-not-just-a-pretty-planar
- positive-feedback.com/reviews/hardware-reviews/rosson-audio-rad-0-headphones/
- theheadphonelist.com/rosson-audio-rad-0-review/