Small enough to wear. Big enough to feel like a theatre.
DRD™ is our patented bass technology. It unlocks deep, resonant low-end from a compact driver — so headphone designs can stay small, light and open without ever sounding thin.
Bass needs air. Sealed chambers and large drivers move it easily — but they add bulk, block your ears and limit design freedom. Open-ear and compact headphones hit a physics wall: without a sealed chamber, up to 60–70% of bass energy disperses.
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Open designs lose bass
Up to 60–70% of bass energy escapes without a sealed chamber.
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Small drivers are limited
Compact drivers physically cannot move enough air for deep lows.
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Convention compromises
Typical designs trade bass away for comfort, size and open-ear safety.
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DRD uses two precision-tuned resonance structures to actively restore the bass that small and open designs lose — no sealed chamber, no bulky driver, no compromise.
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Dual-Resonance Structure — two narrow resonance bands plus one minor band, tuned to reinforce the low end where it naturally falls off.
Patented Magnetic Circuit — maximizes driving force, converting more amplifier energy into clean sound pressure.
Long-Excursion Linearity — ±1.5mm of controlled diaphragm travel, clean at peak volume.
Extreme Efficiency — reference-grade sound pressure with minimal battery draw.
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DRD is Level-3 proprietary technology — no competitor offers an equivalent solution. The resonance architecture and impedance tuning are covered by six patent claims.
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Japan
Patent granted
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China
Application pending
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North America
Exclusivity available*
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*Subject to agreement. Japan/China patent status per Concept Audio filings, Sept 2026.
| Cutting-Driver Tuning Sophisticated engineering unlocks superior sound from fundamental components. |
The Art of Precision Tuning Every micro-component is fine-tuned so every note is pure and precise. |
Big Sound, Small Package Deep bass from compact drivers — lightweight, comfortable, without compromise. |
Innovation at Warp Speed Sound profiles refined in weeks, not months — always ahead of the curve. |
15+ Acoustic engineers |
30+ Patents in portfolio |
1dB Frequency tolerance |
MFI No. 218595 certified |
Product A
CA-2440 — Open-Ear Wireless DRD Headphones
Open-ear safety. Cinema bass. DRD extends open-ear bass from 150–200Hz down to 90Hz — clean, distortion-free. Bluetooth 5.3 · 20h playtime · 3-level fit · 3 sound modes.
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Product B
Type-C Ultra-Light Compact Headphones
Small headphone. Big bass. Feel it. Zero-latency Type-C, 3 EQ modes (Game / Movie / Music), detachable boom mic, spring-plate tactile bass. Up to 30% lighter.
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01 Engineering SamplesWe ship sample units for your team to evaluate. |
02 Live Sound DemoHear DRD side-by-side with category benchmarks. |
03 MOU & ExclusivityAgree territory, brand and exclusivity terms. |
04 Mass ProductionApprox. 90 days from agreement to shelf. |
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