Short answer: the Harman Kardon Onyx Studio 6. It ranks #12 of 75 boombox speakers by sound quality at $130; the Bumpboxx Flare 6 ranks #58 and costs $300, which makes this an easy call rather than a real tradeoff.
What the Harman Kardon Onyx Studio 6 offers: Harman Kardon Onyx Studio 6 uses 2x 75mm woofers + 2x 20mm tweeters. Its 2.94 kg, claimed 8 hours (Manufacturer specified) battery life, IPX7 protection, aux input, up to 96dB and stereo playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its 37Hz specification. There is no companion app. No EQ adjustment.
What the Bumpboxx Flare 6 offers: At 5.9 kg, Bumpboxx Flare 6 combines 6” woofer + tweeters with Bluetooth. Claimed 12 hours (manufacturer specified) battery life, ipx6 protection, up to 115db and stereo playback make its feature set practical for its intended room or portable use. Watch for: There is no companion app. No EQ adjustment.
Buy the Harman Kardon Onyx Studio 6. It ranks higher for sound quality than the Bumpboxx Flare 6 and costs less, so there is no real case for the other one.
Skip the Bumpboxx Flare 6 if sound quality matters to you. It ranks near the bottom of the 75 boombox speakers.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Harman Kardon Onyx Studio 6 | Bumpboxx Flare 6 | |
|---|---|---|
| Price | $130 | $300 |
| Ranked | #12 of 75 in Boombox Size Portable Bluetooth Speakers | #58 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | - |
| Bass Extension (-10dB) | 37Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| IP Rating | IPX7 | IPX6 |
| Bluetooth Latency | 180ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 115dB (Manufacturer specified) |
| Party Mode | Yes (Wireless Dual Sound) | No |
| Power Input | DC Barrel Connector (19V/2A) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) | Yes |
| Weight | 6.5 lbs (2.94 kg) | 13 lbs (5.9 kg) |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| Power Bank | No | No |
| USB Playback | No | No |
| Bluetooth Version | 4.2 | - |
| Amplifier Power | 50W RMS | 150W |
| Dimensions | 5" x 11.5" x 11.2" (128 x 291 x 284 mm) | 24" x 6" x 14" (609.6 x 152.4 x 355.6 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters | 6" woofer + tweeters |
| Digital Aux Input | No | No |
| FM Tuner | - | Yes |
| Lights | - | Yes |
Related Speaker Comparisons
More top alternatives to Harman Kardon Onyx Studio 6:
- Tribit Stormbox Blast vs Harman Kardon Onyx Studio 6
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore vs Harman Kardon Onyx Studio 6
Prices on this page were last checked September 16, 2026 at 12:41 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 6: $130 Amazon eBay
Pros: Harman Kardon Onyx Studio 6 uses 2x 75mm woofers + 2x 20mm tweeters. Its 2.94 kg, claimed 8 hours (Manufacturer specified) battery life, IPX7 protection, aux input, up to 96dB and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of 37Hz (-10dB).
Cons: Bass is limited by its 37Hz specification. There is no companion app. No EQ adjustment.
Full Harman Kardon Onyx Studio 6 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 37Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 180ms |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 5" x 11.5" x 11.2" (128 x 291 x 284 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2A) |
| Stereo | Yes |
| TWS | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) |
| USB Playback | No |
| Weight | 6.5 lbs (2.94 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Onyx Studio 7 vs Onyx Studio 6 - massive deep bass battle 😁 More from alanrossreviews →
- That Speaker Guy: Harman Kardon Onyx Studio 6 vs Devialet Mania
- Ezekielo: Citation 200 vs Onyx Studio 6 vs Bose Portable Speaker Sound Comparison
- Alan Ross Reviews: Harman Kardon Go+ Play 2 mini or Onyx Studio 6 - best speaker for bass?
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
- Head-to-Head Comparisons
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- Harman Kardon Onyx Studio 6 vs Vifa Copenhagen 2.0
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- See all 57 comparisons
Bumpboxx Flare 6: $300 eBay
Pros: At 5.9 kg, Bumpboxx Flare 6 combines 6” woofer + tweeters with Bluetooth. Claimed 12 hours (manufacturer specified) battery life, ipx6 protection, up to 115db and stereo playback make its feature set practical for its intended room or portable use.
Cons: There is no companion app. No EQ adjustment.
Full Bumpboxx Flare 6 review and specifications →
| Amplifier Power | 150W |
|---|---|
| App | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 24" x 6" x 14" (609.6 x 152.4 x 355.6 mm) |
| Drivers | 6" woofer + tweeters |
| EQ | No |
| FM Tuner | Yes |
| IP Rating | IPX6 |
| Lights | Yes |
| Maximum SPL | 115dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 13 lbs (5.9 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons