These are not really the same size class, and that is the honest framing here. The Bose SoundLink Max ranks #17 of 82 large speakers by sound quality at $399; the Harman Kardon Onyx Studio 9 ranks #15 of 76 boombox speakers by sound quality at $189.99.
Why pick the Bose SoundLink Max: IP67 rated - dustproof and waterproof to 1m. The tradeoff: Big peak in the upper bass, dipped midrange and lots of peaks and dips above the midrange.
Why pick the Harman Kardon Onyx Studio 9: 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. The tradeoff: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable.
Buy the Bose SoundLink Max ($399) for a large speaker; the Harman Kardon Onyx Studio 9 ($189.99) suits a boombox speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Bose SoundLink Max | Harman Kardon Onyx Studio 9 | |
|---|---|---|
| Price | $399.00 | $189.99 |
| Ranked | #17 of 82 in Large Size Portable Bluetooth Speakers | #15 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (Harman Kardon One app) |
| Aux Input | Yes | No |
| Aux Latency | 33ms | - |
| Bass Extension (-10dB) | 48Hz | 41Hz |
| Battery Life | 20 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Built-in Microphone | No | - |
| IP Rating | IP67 | None |
| Bluetooth Latency | 116ms | - |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | AC Power Cable (2-Prong) |
| Stereo | Partially (1 tweeter) | Yes |
| Omnidirectional | No | No |
| Weight | 4.9 lbs (2.2 kg) | 9.3 lbs (4.2 kg) |
| Bluetooth Codecs | SBC | SBC |
| EQ | No | Yes (App EQ) |
| Party Mode | No | Yes (Auracast) |
| TWS | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 10.4” x 4.7” x 4.1” (264.7 x 120.1 x 104.9 mm) | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) |
| Drivers | 2x 2.5” (63.5mm) midrange drivers + 1x 0.79” (20mm) tweeter | 120mm woofer + 3x 20mm tweeters |
| Digital Aux Input | No | No |
| Strap | No | No |
| Maximum SPL | - | 101dB (measured by Alan Ross Reviews) |
| USB Playback | - | No |
| Amplifier Power | - | 50W RMS |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 9 compares with other leading options:
- Earfun Uboom X vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs Tribit Stormbox Blast
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 9
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs JBL Partybox Encore Essential 2
Prices on this page were last checked September 26, 2026 at 11:14 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
Bose SoundLink Max: $399.00 Amazon eBay
Pros: IP67 rated - dustproof and waterproof to 1m. Up to 20 hour battery; real-world testing found 43+ hours. Deep, rich bass with neutral tuning, app EQ. USB-C doubles as device charger. Sturdy carry handle. The aux input has lower latency (about 33ms) than most Bluetooth connections. Measured bass extension of 48Hz (-10dB).
Cons: Big peak in the upper bass, dipped midrange and lots of peaks and dips above the midrange. Bass not as deep as a Boom 2. Gets distorted above 80%. Self drains the battery about 20% a week.
Full Bose SoundLink Max review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Aux Latency | 33ms |
| Bass Extension (-10dB) | 48Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 116ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10.4” x 4.7” x 4.1” (264.7 x 120.1 x 104.9 mm) |
| Drivers | 2x 2.5” (63.5mm) midrange drivers + 1x 0.79” (20mm) tweeter |
| EQ | No |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Partially (1 tweeter) |
| Strap | No |
| TWS | Yes |
| Weight | 4.9 lbs (2.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Bose SoundLink Max & SoundCore Boom 2 - indoor soundtest More from Oluv’Sone →
- Joy & Oluv’Sone: Bose SoundLink Max & SoundCore Boom 2 - outdoor soundtest
- Alan Ross Reviews: Bose Max, the worlds most overpriced speaker? its a shocker! More from alanrossreviews →
- Oluv Patreon: Marshall Middleton II - first impressions
- Jay’s Straight Up Reviews & More: Bose SoundLink Max vs. Ultimate Ears EpicBoom 🤑Big Bucks No Whammies? 💣 Let’s Find Out 😧 More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Bose SoundLink Max vs Tribit XSound Mega 😲 Can the Budget Priced Speaker Hang With the Big $ One?
- Scott’s Reviews: Bose SoundLink Max First Impressions, Unboxing, and Sound Test. More from ScottsReviews →
- Mateusz Cholewa: BOGASING S8 Pro Max 100W vs BOSE Soundlink MAX More from Mateusz Cholewa →
- Head-to-Head Comparisons
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- Bose SoundLink Max vs JBL Xtreme 3
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- See all 76 comparisons
Harman Kardon Onyx Studio 9: $189.99 Amazon eBay
Older models: the Harman Kardon Onyx Studio 8 (rated 4.1/5), the Harman Kardon Onyx Studio 7 (rated 4.1/5), the Harman Kardon Onyx Studio 6 (rated 4.1/5), the Harman Kardon Onyx Studio 5 (rated 3.9/5) and the Harman Kardon Onyx Studio 4 (rated 3.3/5).
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 →
| Amplifier Power | 50W RMS |
|---|---|
| App | Yes (Harman Kardon One app) |
| Aux Input | No |
| Bass Extension (-10dB) | 41Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| 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
- Harman Kardon Onyx Studio 9 vs Harman Kardon Onyx Studio 7
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- Harman Kardon Onyx Studio 9 vs Zealot ZE21
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