Short answer: the Onyx Studio 9 for smoothness, the Tronsmart Bang Max for deep bass on a budget. The Bang Max has quite deep bass for the size and money, but it has some peaks in the upper mids and lower treble and is not the smoothest frequency response. The Onyx Studio 9 adds Auracast multi-speaker connection alongside classic stereo pairing, though it has slightly recessed mids, a boost in the upper mids and rolled off upper treble.
The case for the Harman Kardon Onyx Studio 9: Auracast multi-speaker connection alongside classic stereo pairing. The tradeoff: Slight recessed mids, boost in the upper mids, rolled off upper treble.
What the Tronsmart Bang Max gets right: Quite deep bass for the size and money. Set against that: Some peaks in the upper mids and lower treble, not the smoothest frequency response.
Buy the Harman Kardon Onyx Studio 9. It ranks higher for sound quality than the Tronsmart Bang Max and costs less, so there is no real case for the other one.
If battery life is a priority, the Tronsmart Bang Max is rated for 24 hours versus 8 hours for the Harman Kardon Onyx Studio 9.
There is a real gap in water resistance: the Tronsmart Bang Max at IPX6 (powerful water jets) against the Harman Kardon Onyx Studio 9, which has no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 9 | Tronsmart Bang Max | |
|---|---|---|
| Price | $189.99 | $229.99 |
| Ranked | #14 of 75 in Boombox Size Portable Bluetooth Speakers | #36 of 75 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | 39Hz |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | 111dB (measured by Alan Ross Reviews) |
| IP Rating | None | IPX6 |
| Power Input | AC Power Cable (2-Prong) | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 9.3 lbs (4.2 kg) | 12.8 lbs (5.8 kg) |
| App | Yes (Harman Kardon One app) | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (App EQ) | Yes (multiple modes) |
| Party Mode | Yes (Auracast) | No |
| USB Playback | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Battery Life | 8 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 130W |
| Dimensions | 11.4" x 11.3" x 5.1" (289.2 x 287.5 x 130 mm) | 18.5" x 7.8" x 10.2" (470 x 199 x 260 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 2x ~165mm (6.5") woofers + 2x ~63mm (2.5") mid drivers + 2x ~25mm (1") tweeters |
| Digital Aux Input | No | No |
| Aux Input | No | Yes |
| Aux Latency | - | 16ms |
| Bluetooth Latency | - | 160ms |
| MicroSD Playback | - | Yes |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | No |
| Lights | - | Yes |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 9 compares with other leading options:
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- 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 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
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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Tronsmart Bang Max: $229.99 Tronsmart eBay
Pros: A powerful, feature-rich party speaker with loud, bass-rich output, app EQ, power-bank capability, lighting, TWS/multi-speaker linking, and separate microphone and guitar inputs with independent level control. Reviews find it can fill a large room even at moderate volume, while SoundPulse or custom EQ gives it useful flexibility for parties and casual karaoke. Measured bass extension of 39Hz (-10dB).
Cons: Its bass-first tuning prioritizes impact over accuracy: upper mids and lower treble can sound unnatural, while fine midrange and treble detail are limited. Deep Bass mode can swallow the rest of the mix, volume control is imprecise and some reviewers hear distortion above roughly 98dB. It is a party tool, not a neutral monitor.
Full Tronsmart Bang Max review and specifications →
| Amplifier Power | 130W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 16ms |
| Bass Extension (-10dB) | 39Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 160ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 18.5" x 7.8" x 10.2" (470 x 199 x 260 mm) |
| Drivers | 2x ~165mm (6.5") woofers + 2x ~63mm (2.5") mid drivers + 2x ~25mm (1") tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| Lights | Yes |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 12.8 lbs (5.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Tronsmart Bang Max Review, JBL Boombox 3 wannabe 130w More from alanrossreviews →
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- Jay’s Straight Up Reviews & More: Triple Threat Match 🔺 SkullCandy Barrel XT, Tribit Blast & Tronsmart Bang Max 📛 Bluetooth Boombox 🔋 More from JaysStraightUpReviews →
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