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 Aiwa Exos-10 ranks #39, rated 3.5/5, at $159.99, $88.91 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Harman Kardon Onyx Studio 7 is the better-sounding choice. The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. The catch: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested.
The Aiwa Exos-10 is the longer-running option. Clear, clean treble with good separation of instruments and vocals, and no distortion even near full volume in a side by side test against the W-King X20, where it kept up in loudness at 90%. It is rated for 12 hours of battery against 8 for the Harman Kardon Onyx Studio 7. It has an adjustable EQ, which the Harman Kardon Onyx Studio 7 lacks. The tradeoff: It lacks deep bass: even with bass maxed it rolls off around 50Hz, where the W-King X20 and Zealot boomboxes reach deeper, and it is about 2dB quieter at full volume.
Buy the Harman Kardon Onyx Studio 7. It is rated higher for sound quality, and the $88.91 you would save on the Aiwa Exos-10 does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 7 | Aiwa Exos-10 | |
|---|---|---|
| Price | $248.90 | $159.99 |
| Ranked | #14 of 91 in Boombox Size Portable Bluetooth Speakers | #39 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) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| IP Rating | None | - |
| Bluetooth Latency | 266ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wireless Dual Sound) | Yes (Party Sync, 100+ speakers) |
| Power Input | DC Barrel Connector (19V/2.1A) | - |
| Stereo | Partially (1 woofer) | Partially |
| Omnidirectional | No | - |
| TWS | No | - |
| Weight | 6.4 lbs (2.9 kg) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| App | No | - |
| EQ | No | Yes (bass and treble) |
| Power Bank | No | - |
| USB Playback | No | Yes |
| Amplifier Power | 50W RMS | 200W RMS (40W x 2 + 120W) |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) | - |
| Drivers | 120mm woofer + 2x 25mm tweeters | 6.5” (165mm) subwoofer + full-range drivers, 4 passive radiators |
| Digital Aux Input | No | - |
| Bluetooth Version | 4.2 | 5.0 |
| Strap | No | - |
| Removable Battery | - | No |
| FM Tuner | - | Yes |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 7 compares with other leading options:
- 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!
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 6
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 8
- Harman Kardon Onyx Studio 7 vs Zealot ZE51
- Harman Kardon Onyx Studio 7 vs Zealot ZE41
- Harman Kardon Onyx Studio 7 vs Yeahbox Sonic Boom Ultra
- Harman Kardon Onyx Studio 7 vs Zealot ZE21
- Harman Kardon Onyx Studio 7 vs Zealot S89
- See all 71 comparisons
Aiwa Exos-10: $159.99 Amazon eBay
Older model: the Aiwa Exos-9 (ranked higher, rated 4.2/5).
Pros: Clear, clean treble with good separation of instruments and vocals, and no distortion even near full volume in a side by side test against the W-King X20, where it kept up in loudness at 90%. A 200W RMS tri-amplified design with a 6.5” woofer and four passive radiators, FM radio with presets, aux and USB inputs, a remote, analog-style VU meters and Party Sync with 100+ speakers.
Cons: It lacks deep bass: even with bass maxed it rolls off around 50Hz, where the W-King X20 and Zealot boomboxes reach deeper, and it is about 2dB quieter at full volume. Owners comparing it with the Aiwa Exos 9 it replaces find the older model clearer with tighter bass, and the Exos 10 drops the Exos 9’s 5-band EQ (only bass and treble) and removable battery. Claimed battery life is 12 hours.
Full Aiwa Exos-10 review and specifications →
| Amplifier Power | 200W RMS (40W x 2 + 120W) |
|---|---|
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Version | 5.0 |
| Drivers | 6.5” (165mm) subwoofer + full-range drivers, 4 passive radiators |
| EQ | Yes (bass and treble) |
| FM Tuner | Yes |
| Party Mode | Yes (Party Sync, 100+ speakers) |
| Removable Battery | No |
| Stereo | Partially |
| USB Playback | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons