The Harman Kardon Onyx Studio 9 is a premium portable Bluetooth speaker known for its elegant design and high-quality audio performance. Here's a detailed overview of its features and specifications:

Key Features:

• Superior Sound Performance: It features a three-channel system with a dedicated center channel and two tweeters, delivering crystal-clear vocals and a wide soundstage thanks to its Constant Sound Field technology. This creates an immersive listening experience.
• Iconic Design: The speaker sports a clean, circular design with a premium fabric finish. The integrated aluminum frame acts as both a sturdy handle for portability and a stylish stand.
• Bluetooth Music Streaming: It can be paired with up to two mobile devices simultaneously, allowing for easy sharing of playlists.
• Auracast™ Multi-Speaker Connection: This feature allows you to connect two or more Harman Kardon speakers (or compatible speakers from other brands) wirelessly to create a synchronized, multi-room audio experience. Control can be managed through the speaker or the Harman Kardon ONE app.
• Built-in Rechargeable Battery: Offers up to 8 hours of playtime, allowing you to enjoy music throughout your home without being tethered to a power outlet.
• Self-Tuning: When powered on, the Onyx Studio 9 automatically calibrates its sound output to its environment, ensuring optimal audio performance no matter where it's placed.
• Wireless Stereo Pairing: You can wirelessly pair two Onyx Studio 9 speakers together to create a wider and more detailed stereo soundstage for a more impactful audio experience.
• USB Charging Port: A built-in USB port allows you to charge your smartphones or tablets while you're listening to music, ensuring your devices stay powered up.
• Harman Kardon ONE App: This app allows for easy setup of the speaker, personalization of audio settings, EQ adjustments, and control of all your compatible Harman Kardon speakers in one place.
• Durable and Premium Materials: The integrated handle is made with 90% recycled aluminum, reflecting a focus on sustainability.

Specifications:

• Rated Output Power: 50W RMS
• Power Supply: 100-240Vac, 50/60Hz
• Transducers: Woofer 1 x 120mm, Tweeter 3 x 20mm
• Frequency Response: 50Hz – 20kHz (-6dB)
• Signal-to-Noise Ratio: > 80dB
• Bluetooth Version: 5.3
• Bluetooth Profiles: ¹ A2DP 1.4, AVRCP 1.6 
  
  
• Battery Type: Li-ion 17.14 Wh (equivalent to 3.63V/4722mAh)
• Battery Charge Time: Approximately 4 hours
• Music Play Time: Up to 8 hours (dependent on volume level and audio content)
• USB Port: Type C
• USB Rating: 5V / 2.1A (Max) for charging out
• Dimensions (W x H x D): 289.2 x 287.5 x 130 mm / 11.39" x 11.32" x 5.12"
• Weight: 3.36 kg / 7.42 lbs