Harman Kardon Onyx Studio 9

Harman Kardon Onyx Studio 9

Harman Kardon Onyx Studio 9 is a premium portable Bluetooth home speaker released in 2025, the latest in the iconic Onyx Studio line. It blends stylish design with solid audio performance for indoor/home use.

Key Features

• Design: Elegant, sculptural oval/circular shape with fabric grille. Built-in sturdy handle (90% recycled aluminum) for easy portability around the home. Available in Black and Grey. Dimensions: ~289 x 287.5 x 130 mm; Weight: ~3.33 kg.
• Sound: 50W RMS output. Drivers: 1x 120mm woofer + 3x 20mm tweeters (three-channel setup with dedicated center for vocals). Frequency response: 50Hz–20kHz (-6dB). New Constant Sound Field technology widens the soundstage for immersive, clear vocals, bright highs, and deep bass. Automatic self-tuning adapts to placement.
• Battery & Portability: Up to 8 hours playtime (real-world varies; some tests show ~11+ hours at moderate volumes). 4-hour charge time. Built-in USB-C port for charging devices (5V/2.1A). Runs on mains power too.
• Connectivity: Bluetooth 5.3 (multipoint pairing), Auracast for multi-speaker linking/stereo pairing, 3.5mm aux input. App support (Harman Kardon One) with EQ presets and customization. No Wi-Fi.
• Other: No IP rating (not waterproof/dustproof—keep indoors). MP3 support via USB (limited).

Performance Highlights (from Reviews)

• Praised for clear, balanced/warm sound with good bass for its size, wide soundstage, and room adaptation. Strong for music, voices, and general listening in medium rooms.
• Some notes on midrange recess or boominess at low volumes in certain tests, but overall positive for its class. Good power reserves.
• Excellent build quality and aesthetics—often compared favorably to higher-end designs.

Cons: No weatherproofing (not for outdoors/pool), no Wi-Fi/smart assistant integration, battery life is decent but not class-leading for heavy use.