Short answer: the Harman Kardon Onyx Studio 7. It ranks #14 of 91 boombox speakers by sound quality, rated 4.1/5, at $248.90. The onn Pro X Large Boom Boombox ranks #44, rated 3.4/5, at $199, $49.90 cheaper, which does not close the gap in sound quality.
The Harman Kardon Onyx Studio 7 is the better-sounding, lighter choice. The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. At 6.4 lbs (2.9 kg) it weighs much less than the onn Pro X Large Boom Boombox at 17.2 lbs (7.8 kg). The tradeoff: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested.
The onn Pro X Large Boom Boombox is the longer-running, tougher choice. High rated power for the price at 180W RMS (540W peak). It is rated for 20 hours of battery against 8 for the Harman Kardon Onyx Studio 7. It is rated IP67, while the Harman Kardon Onyx Studio 7 has no water resistance. It has an adjustable EQ, which the Harman Kardon Onyx Studio 7 lacks. The catch: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.
Buy the Harman Kardon Onyx Studio 7. It is rated higher for sound quality, and the $49.90 saving on the onn Pro X Large Boom Boombox is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Harman Kardon Onyx Studio 7 | onn Pro X Large Boom Boombox | |
|---|---|---|
| Price | $248.90 | $199.00 |
| Ranked | #14 of 91 in Boombox Size Portable Bluetooth Speakers | #44 of 91 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 37Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| IP Rating | None | IP67 |
| Bluetooth Latency | 266ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wireless Dual Sound) | Yes (Auracast) |
| Power Input | DC Barrel Connector (19V/2.1A) | AC Power cord |
| Stereo | Partially (1 woofer) | - |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 6.4 lbs (2.9 kg) | 17.2 lbs (7.8 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| App | No | - |
| EQ | No | Yes (Bass Boost) |
| Power Bank | No | Yes (USB-A, 5V/2A) |
| USB Playback | No | - |
| Amplifier Power | 50W RMS | 180W RMS (540W peak) |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Drivers | 120mm woofer + 2x 25mm tweeters | 5 speakers |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 5.4 (Manufacturer specified) |
| Strap | No | - |
| Removable Battery | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
Related Speaker Comparisons
More top alternatives to Harman Kardon Onyx Studio 7:
- Tribit Stormbox Blast vs Harman Kardon Onyx Studio 7
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 7
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 7
- JBL PartyBox On-The-Go 2 Plus vs Harman Kardon Onyx Studio 7
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 7
Prices on this page were last checked October 4, 2026 at 9:58 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
Harman Kardon Onyx Studio 7: $248.90 Amazon eBay
Newer model: the Harman Kardon Onyx Studio 9, ranked lower, rated 4.1/5.
Pros: The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. It delivers strong, deep bass, useful large-room volume and can pair with a second Studio 7 for stereo. Measured bass extension of 37Hz (-10dB).
Cons: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested. Battery life remains only about eight hours, it has no water rating or advanced codecs, and it is not an especially loud outdoor speaker.
Full Harman Kardon Onyx Studio 7 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 37Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 266ms |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) |
| Drivers | 120mm woofer + 2x 25mm tweeters |
| EQ | No |
| IP Rating | None |
| 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/2.1A) |
| Stereo | Partially (1 woofer) |
| Strap | No |
| TWS | No |
| USB Playback | No |
| Weight | 6.4 lbs (2.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Boombox 2 vs Onyx Studio 7 big bass battle 💋 More from alanrossreviews →
- Alan Ross Reviews: Onyx Studio 7 vs Onyx Studio 6 - massive deep bass battle 😁
- Geri’s Collection: Harman Kardon Onyx 7 vs Onyx 4
- KULAS TECH SHOW: Harman / Kardon Onyx Studio 5 vs Onyx Studio 7 - Close battle🔥🔥 More from KULASTECHSHOW20 →
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
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onn Pro X Large Boom Boombox: $199.00 Walmart eBay
Pros: High rated power for the price at 180W RMS (540W peak). IP67 waterproof design for indoor and outdoor use. 20 hour battery life. 6 LED lighting modes. Party Mode supports multiple devices.
Cons: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast. Frequency response isn’t as smooth as the top ranked speakers. Charges via AC cable rather than USB-C. Only available in the United States and Canada.
Full onn Pro X Large Boom Boombox review and specifications →
| Amplifier Power | 180W RMS (540W peak) |
|---|---|
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 (Manufacturer specified) |
| Digital Aux Input | No |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Drivers | 5 speakers |
| EQ | Yes (Bass Boost) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| TWS | Yes |
| Weight | 17.2 lbs (7.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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