Short answer: the Bugani Boost Max for output, the Harman Kardon Onyx Studio 9 for connectivity. The Bugani claims 240W stereo from dual 4-inch woofers and passive bass radiators, though its bass is not as deep as the top ranked speakers. The Onyx Studio 9 adds Auracast multi-speaker connection alongside stereo pairing, but its mids are slightly recessed with an upper-mid boost and rolled-off upper treble.
What the Bugani Boost Max gets right: 240W stereo output with dual 4” woofers and passive bass radiators. The catch: Bass not as deep as the top ranked speakers.
On the Harman Kardon Onyx Studio 9 side: Auracast multi-speaker connection alongside classic stereo pairing. Set against that: Slight recessed mids, boost in the upper mids, rolled off upper treble.
Buy the Harman Kardon Onyx Studio 9. It ranks higher for sound quality than the Bugani Boost Max and costs less, so the other one has nothing left to offer.
There is a real battery-life gap here: the Bugani Boost Max is rated for 15 hours, the Harman Kardon Onyx Studio 9 only 8 hours.
There is a real gap in water resistance: the Bugani Boost Max at IPX6 (powerful water jets) against the Harman Kardon Onyx Studio 9, which has no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Bugani Boost Max | Harman Kardon Onyx Studio 9 | |
|---|---|---|
| Price | $240 | $189.99 |
| Ranked | #43 of 75 in Boombox Size Portable Bluetooth Speakers | #14 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IPX6 | None |
| Microphone Input | Yes | - |
| Power Input | USB-C | AC Power Cable (2-Prong) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 12.8 lbs (5.8 kg) | 9.3 lbs (4.2 kg) |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (Harman Kardon One app) |
| EQ | No | Yes (App EQ) |
| Party Mode | No | Yes (Auracast) |
| Power Bank | Yes (USB-C) | - |
| Built-in Microphone | No | - |
| Bluetooth Version | 5.3 | 5.3 |
| Amplifier Power | 240W | 50W RMS |
| Dimensions | 16.9" x 7.9" x 8.3" (430 x 200 x 210 mm) | 11.4" x 11.3" x 5.1" (289.2 x 287.5 x 130 mm) |
| Drivers | 2x 50mm drivers + passive radiators | 120mm woofer + 3x 20mm tweeters |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 41Hz |
| Maximum SPL | - | 101dB (measured by Alan Ross Reviews) |
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Prices on this page were last checked September 22, 2026 at 5:11 AM 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
Bugani Boost Max: $240 Amazon eBay
Pros: 240W stereo output with dual 4” woofers and passive bass radiators. IPX5 rated. Bluetooth 5.3, AUX, USB, TWS pairing. 16 hour battery at 50% volume. Built-in power bank.
Cons: Bass not as deep as the top ranked speakers. Some midrange peaks. Poor water rating.
Full Bugani Boost Max review and specifications →
| Amplifier Power | 240W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.9" x 7.9" x 8.3" (430 x 200 x 210 mm) |
| Drivers | 2x 50mm drivers + passive radiators |
| EQ | No |
| IP Rating | IPX6 |
| Microphone Input | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 12.8 lbs (5.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: Bugani Boost Max vs Tribit Stormbox Blast - GhettoBlaster Battle 🏠Indoors 🔋Battery Powered More from JaysStraightUpReviews →
- Jagist reviews: Bugani Boost Max Vs Harmon Kardon Go Plus Play 3!!! 😁😁😁 More from Jagistreviews →
- Jagist reviews: Bugani Boost Max Vs W-king X20!!! 😍😍😍
- Head-to-Head Comparisons
Harman Kardon Onyx Studio 9: $189.99 Amazon eBay
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 |
| TWS | Yes |
| USB Playback | No |
| Weight | 9.3 lbs (4.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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