Harman Kardon Onyx Studio 9 Review: Rated 4.1/5

Last updated: October 28, 2026

The Harman Kardon Onyx Studio 9 is rated 4.1/5 for sound quality, #15 of 112 Boombox Size Portable Bluetooth Speakers. See all Portable Bluetooth rankings for every top pick.

Harman Kardon Onyx Studio 9 · Editor's rating 4.1/5, ranked #15 of 112 Boombox Size Portable Bluetooth Speakers
Check price at Amazon ($184.99) →About its usual price ↓ price history

Prices on this page were last checked November 5, 2026 at 10:30 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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Brand: Harman Kardon

#15 Harman Kardon Onyx Studio 9: $184.99 Amazon $184.99 eBay

Older models: the Harman Kardon Onyx Studio 8 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 7 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 6 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 5 (ranked lower, rated 3.9/5) and the Harman Kardon Onyx Studio 4 (rated 3.3/5). See every Harman Kardon Onyx Studio generation.

Pros: An elegant living room portable with balanced, smooth, non-fatiguing sound, app EQ, and stereo pairing for music lovers. An elegant 4.2kg living-room portable with a measured 41Hz -10dB bass point, 101dB maximum level, three tweeters, app EQ, stereo pairing and Auracast multi-speaker linking. Reviews praise its balanced, smooth presentation and non-fatiguing treble, making it a more music-focused choice than most party speakers. Measured bass extension of 41Hz (-10dB).

Cons: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable. Bass is less deep than some earlier Onyx Studio models, while the slightly recessed mids and rolled-off top end mean it is not the most open or detailed option; it still charges from an AC power cable rather than USB-C.

Is the Harman Kardon Onyx Studio 9 right for you?

Buy it if

  • you need it loud (measured 101 dB).
  • you want stereo sound from a single speaker.

Skip it if

  • you will use it near water or outdoors: it has no water resistance rating.
  • you need all-day battery: it is rated for only 8 hours.
ReleasedDec 2024 (1 year ago)
Amplifier Power50W RMS
AppYes (Harman Kardon One app)
Aux InputNo
Bass Extension (-10dB)41Hz
Battery Life8 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC
Bluetooth Version5.3
Digital Aux InputNo
Dimensions11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm)
Drivers120mm woofer + 3x 20mm tweeters
EQYes (App EQ)
IP RatingNone
Maximum SPL101dB (measured by Alan Ross Reviews)
OmnidirectionalNo
Party ModeYes (Auracast)
Power InputAC Power Cable (2-Prong)
StereoYes
StrapNo
TWSYes
USB PlaybackNo
Weight9.3 lbs (4.2 kg)
Check current price at Amazon ($184.99) →Search eBay for Harman Kardon Onyx Studio 9 →

Price history

$169.99$194.95Aug 7, 2026 to Aug 10, 2026: $169.99Aug 10, 2026 to Sep 12, 2026: $186.99Sep 12, 2026 to Sep 14, 2026: $174.99Sep 14, 2026 to Sep 16, 2026: $194.95Sep 16, 2026 to Oct 15, 2026: $189.99Oct 15, 2026 to Oct 19, 2026: $186.99Oct 19, 2026 to Oct 26, 2026: $179.99Oct 26, 2026 to Nov 5, 2026: $184.99Aug 2026Today

$184.99 is about its usual price. The lowest we have tracked since Aug 2026 is $169.99, in Aug 2026.

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