Onkyo A800

Updated October 6, 2026

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The Onkyo A800 is a discontinued flagship open-back headphone that has achieved a "cult classic" status among audiophiles for its unique sound profile and premium build. Often described as a "Sennheiser HD 600 with sub-bass," it is highly regarded for its intimate, musical presentation. Reddit Head-Fi

Product Overview & Features

* Acoustic Design: Developed by the engineering team behind the Philips Fidelio X1/X2, the A800 features 50mm high-power drivers with multi-layer diaphragms in an aluminum chamber. Reddit Head-Fi

* Sound Profile: Known for a warm-neutral signature that follows the Harman Target Curve. Unlike many open-backs, it offers exceptional sub-bass rumble (down to 4Hz) without muddying the intimate, forward midrange. Reddit Head-Fi

* Build & Comfort: It features a striking black and gold "Art Deco" aesthetic with a very wide headband to distribute its heavy weight (~470g). Head-Fi Head-Fi

* Connectivity: Uses a unique flat ribbon cable and dual 3.5mm connectors, making it easy to drive at 32 ohms. Head-Fi Reddit

Market Trends & Insights

* Discontinuation & Rarity: Quietly discontinued around 2018, it is now rare, with production estimated at only 500–1,000 units. Head-Fi Reddit

* Market Positioning: Originally retailed for $399, it was often "slept on" due to poor distribution. Head-Fi Reddit It now competes in the used market with modern audiophile staples like the Sennheiser HD 660S2 and Fidelio X2HR. Reddit

* Consumer Sentiment: Enthusiasts seek it out as an upgrade to the HD 600, citing its superior bass and "3D" imaging. Reddit Reddit A common trend among owners is the "pad mod," where users replace the shallow stock pads with Yaxi pads to improve ear depth and comfort. Reddit Head-Fi

While the original A800 is no longer in production, modern alternatives like the Kiwi Ears Altruva and FA-815 have emerged, attempting to capture the high-fidelity, large-driver open-back market at various price points. Alibaba Alibaba

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Sources & References

26 sources cited · Verified industry data & reports

ONKYO A800 50mm Open Back Headphone - Reviews

Head-Fi.org

impedance 32ohms, sensitivity 100db/1mW, frequency response 4Hz - 40kHz, 50mm multi-layer diaphragm. Build quality, looks and comfort. A800 ...

Onkyo Flagship A800 Headphones Review- HD 600 with ...

Reddit · r/headphones

2 3.5 mm jacks, Onkyo A800 has a wonderful soundstage and is able to produce a 3D sounding image.

Onkyo A800 – "MASTER CLASS"

Head-Fi.org

90% Driver diameter: 50mm high power driver. Impedance: 32ohms. Dimensions: 240mm x 285mm x 120mm Weight: 470g Retailed: $399

Onkyo A800: Measurement and third-party pads

unheardlab.com

Technicality: nothing really stands out: resolution is there, imaging is ok, soundstage is decent but not huge. Typical mid-fi cans performance.

Onkyo A800 High-Resolution Headphones | PDF

Scribd

The A800 is an open-back, over-ear headphone designed for high resolution audio playback at home. It features 50mm high power drivers with a multi-layer ...

(Open Back Headphones Review) ONKYO A800: One of ...

audio-sound @ hatena

The ONKYO A800 is a very good headphone overall, Total Score: 8.8 / 10.0. Performance Bonus: 10.5 / 10.0 and provide a comfortable fit.

Onkyo A800

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Onkyo A800 Headphones

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