Short answer: the Harman Kardon Onyx Studio 9. It ranks #15 of 98 boombox speakers by sound quality (rated 4.1/5) at $189.99 and is still sold new; the JBL Boombox ranks #67 (rated 2.9/5) and is discontinued, so it is only an option used. The JBL Boombox’s replacement, the JBL Boombox 4, is rated 4.0/5 at $549.95.
The Harman Kardon Onyx Studio 9 is the better-sounding pick. An elegant 9.3 lbs (4.2 kg) living-room portable with a measured 41Hz -10dB bass point, 101dB maximum level, three tweeters, app EQ, stereo pairing and Auracast multi-speaker linking. It has an adjustable EQ, which the JBL Boombox lacks. Watch for: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable.
The JBL Boombox is the longer-running, tougher pick. Claimed 24 hours (manufacturer specified) battery life, ipx5 protection and stereo playback make its feature set practical for its intended room or portable use. It is rated for 24 hours of battery against 8 for the Harman Kardon Onyx Studio 9. It is rated IPX5, while the Harman Kardon Onyx Studio 9 has no water resistance. It keeps a wired aux input, which the Harman Kardon Onyx Studio 9 lacks. The catch: Treble is not very smooth.
Buy the Harman Kardon Onyx Studio 9. It is rated higher for sound quality; the JBL Boombox is no longer sold new.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 9 | JBL Boombox | |
|---|---|---|
| Price | $189.99 | $399 Discontinued |
| Ranked | #15 of 98 in Boombox Size Portable Bluetooth Speakers | #67 of 98 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | - |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | - |
| IP Rating | None | IPX5 |
| Power Input | AC Power Cable (2-Prong) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 9.3 lbs (4.2 kg) | 11.5 lbs (5.2 kg) |
| App | Yes (Harman Kardon One app) | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (App EQ) | No |
| Party Mode | Yes (Auracast) | Yes (Connect+ up to 100 speakers) |
| USB Playback | No | No |
| Bluetooth Version | 5.3 | 4.2 |
| Battery Life | 8 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 60W AC / 40W battery |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) | 10” x 18.1” x 7.7” (254.5 x 458.5 x 195.5 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 2x 65mm woofers + 2x 20mm tweeters with passive radiators |
| Digital Aux Input | No | No |
| Aux Input | No | Yes |
| Strap | No | - |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | No |
| FM Tuner | - | No |
| Microphone Input | - | No |
| MicroSD Playback | - | No |
Related Speaker Comparisons
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- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 9
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 9
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Prices on this page were last checked October 12, 2026 at 4:13 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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The Two Speakers In Full
Harman Kardon Onyx Studio 9: $189.99 Amazon $189.99 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 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.
Full Harman Kardon Onyx Studio 9 review and specifications →
| Released | Dec 2024 (1 year ago) |
|---|---|
| Amplifier Power | 50W RMS |
| App | Yes (Harman Kardon One app) |
| Aux Input | No |
| Bass Extension (-10dB) | 41Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | AC Power Cable (2-Prong) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 9.3 lbs (4.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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JBL Boombox: $399 Discontinued eBay
Newer model: the JBL Boombox 4, ranked higher, rated 4/5, released Jul 2025. See every JBL Boombox generation.
Pros: At 5.2 kg, JBL Boombox combines 2x 65mm woofers + 2x 20mm tweeters with passive radiators with Bluetooth and aux. Claimed 24 hours (manufacturer specified) battery life, ipx5 protection and stereo playback make its feature set practical for its intended room or portable use. JBL Connect+ links up to 100 compatible speakers.
Cons: There is no companion app. No EQ adjustment. Treble is not very smooth. Discontinued.
Full JBL Boombox review and specifications →
| Released | Sep 2017 (9 years ago) |
|---|---|
| Amplifier Power | 60W AC / 40W battery |
| App | No |
| Aux Input | Yes |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10” x 18.1” x 7.7” (254.5 x 458.5 x 195.5 mm) |
| Drivers | 2x 65mm woofers + 2x 20mm tweeters with passive radiators |
| EQ | No |
| FM Tuner | No |
| IP Rating | IPX5 |
| MicroSD Playback | No |
| Microphone Input | No |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 11.5 lbs (5.2 kg) |
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