Short answer: the Harman Kardon Onyx Studio 4 if you need battery power, the JBL Xtreme 2 if you want the more monitor-like balance. The Onyx Studio 4 pairs deep, resonant bass and crisp treble with a large dynamic range and runs 8 hour at medium volume. The Xtreme 2’s four drivers give it a refined bass balance closer to studio monitors than typical portables, but it charges from an external AC power brick, so it stays tethered.
Buy the JBL Xtreme 2 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the Tribit Stormbox Lava instead.
Water resistance is not close: the JBL Xtreme 2 is rated at IPX7 (brief submersion), well ahead of the Harman Kardon Onyx Studio 4 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Xtreme 2 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $199.99 Discontinued | $100 Discontinued |
| Ranked | #53 of 93 in Large Size Portable Bluetooth Speakers | #58 of 93 in Large Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 54Hz | - |
| Battery Life | 15 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Connect+ up to 100 speakers) | Yes (Connect+ up to 100 speakers) |
| TWS | No | Yes |
| Weight | 5.3 lbs (2.4 kg) | 4.5 lbs (2.06 kg) |
| App | No | Yes (HK Connect) |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| IP Rating | IPX7 | None |
| Power Bank | No | No |
| Power Input | USB-C | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 4.2 | 4.2 |
| Drivers | 2x 70mm woofers, 2x 20mm tweeters | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| Dimensions | 11.3” x 5.4” x 4.2” (287 x 137 x 107 mm) | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W RMS | 60W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | No |
Related Speaker Comparisons
More worthwhile head-to-heads for JBL Xtreme 2:
- JBL Xtreme 5 vs JBL Xtreme 2
- Tribit Stormbox Lava vs JBL Xtreme 2
- Soundcore Boom 2 vs JBL Xtreme 2
- Marshall Stockwell II vs JBL Xtreme 2
- Harman Kardon Citation 200 vs JBL Xtreme 2
Prices on this page were last checked October 2, 2026 at 10:18 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
JBL Xtreme 2: $199.99 Discontinued Amazon eBay
Newer model: the JBL Xtreme 5, ranked higher, rated 4.6/5.
Pros: Four drivers with refined bass balance, closer to studio monitors than typical portables. IPX7 water-resistant. Amazing real-world battery: ~20 hours at 75dB (vs 15hr claim). USB-A port charges other devices. Optional carry strap. Measured bass extension of 54Hz (-10dB).
Cons: External AC power brick for charging. Boosted bass. Treble harsh at high volumes. Discontinued.
Full JBL Xtreme 2 review and specifications →
| Amplifier Power | 40W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 54Hz |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.3” x 5.4” x 4.2” (287 x 137 x 107 mm) |
| Drivers | 2x 70mm woofers, 2x 20mm tweeters |
| EQ | No |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable shoulder strap) |
| TWS | No |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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- Ezekielo: JBL Xtreme 2 vs Sonos Move with Sound Comparison
- HT Sound: Devialet Mania VS JBL Xtreme 2 - 60% Vol (Listen with headphones)
- Head-to-Head Comparisons
Harman Kardon Onyx Studio 4: $100 Discontinued eBay
Newer model: the Harman Kardon Onyx Studio 9, rated 4.1/5.
Pros: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Multi-host Bluetooth connectivity for 2 phones, daisy chaining up to 100 speakers. Elegant modern design with smooth curves and premium materials.
Cons: 8 hour battery at medium volume. Not at loud as others. Not as deep of bass as the newer Onyx. External AC power brick for charging. Discontinued.
Full Harman Kardon Onyx Studio 4 review and specifications →
| Amplifier Power | 60W |
|---|---|
| App | Yes (HK Connect) |
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 4.5 lbs (2.06 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 4 vs Zealot S97
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- Harman Kardon Onyx Studio 4 vs JBL Xtreme
- Harman Kardon Onyx Studio 4 vs Doss Soundbox XL
- Harman Kardon Onyx Studio 4 vs W-King D8
- Harman Kardon Onyx Studio 4 vs Sony SRS-XB43
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