The Harman Kardon Onyx Studio speaker is one of the most popular single Bluetooth speakers out there. It is one which adopts a more traditional speaker shape, is larger than a number of other options and offers a pretty good and powerful level of sound output. Over the last couple of years, the original Harman Kardon Onyx Studio has been succeeded by newer models and the absolute newest model is the Harman Kardon Onyx Studio 3. This one retails via Harman Kardon for $499.95, although for those looking for a bargain, it is currently available via a deal on eBay for only $215. A price which is better than half price, on what is the newest Harman Kardon Onyx Studio speaker.
In terms of the more technical information, the Harman Kardon Onyx Studio 3 comes equipped with a dual woofer and tweeter design with two 75 mm woofers in place alongside two 20 mm tweeters. The frequency range on offer is 50 Hz - 20 kHz, while the Signal-to-Noise ratio is 80 dB. This is a Bluetooth-enabled speaker and the battery is rated to offer up to five hours of continuous audio playback. The Harman Kardon Onyx Studio 3 offers a rated power of 4 x 15 watts when connected directly to a mains source and a reduced capacity of 4 x 7.5 watts when in battery mode. Not forgetting the Harman Kardon Onyx Studio 3 also comes with additional features like a built-in microphone for taking and making hands-free calls.