Short answer: the Onyx Studio 7 remains a compact warm-sounding home speaker, whereas the Boom 2 Plus is the lighter speaker for users prepared to fine-tune it. Harman Kardon is 14 of 113, with Soundcore at 39 of 113.
The Onyx 7 has bass weight but less bass than the Onyx 6, an eight-hour medium-volume battery estimate, and a somewhat sterile character in addition to its warm tuning. The Boom 2 Plus is much easier to carry and may climb with a successful EQ tune, though its stock upper-bass lift and rolled-off treble need attention.
Buy the Harman Kardon Onyx Studio 7 if you want its distinctive form factor and an easygoing warm sound for moderate listening.
Buy the Soundcore Boom 2 Plus if portability and adjustable tuning are the more important qualities.
If battery life is a priority, the Soundcore Boom 2 Plus is rated for 20 hours versus 8 hours for the Harman Kardon Onyx Studio 7.
There is a real gap in water resistance: the Soundcore Boom 2 Plus at IPX7 (brief submersion) against the Harman Kardon Onyx Studio 7, which has no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Measured Differences
- Output: the Soundcore Boom 2 Plus was measured at 111 dB maximum against 96 dB for the Harman Kardon Onyx Studio 7, so it gets clearly louder before it runs out of headroom.
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Specifications Side By Side
| Harman Kardon Onyx Studio 7 | Soundcore Boom 2 Plus | |
|---|---|---|
| Price | $248.90 | $169.99 |
| Ranked | #14 of 113 in Boombox Size Portable Bluetooth Speakers | #39 of 113 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 37Hz | 39Hz |
| Battery Life | 8 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| IP Rating | None | IPX7 |
| Bluetooth Latency | 266ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 111dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Wireless Dual Sound) | Yes (PartyCast 2.0) |
| Power Input | DC Barrel Connector (19V/2.1A) | USB-C |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 6.4 lbs (2.9 kg) | 8.4 lbs (3.8 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC |
| App | No | Yes |
| EQ | No | Yes (Pro EQ + presets) |
| Power Bank | No | Yes (USB-C, 5V/2A) |
| USB Playback | No | No |
| Amplifier Power | 50W RMS | 140W |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) | 17.3” x 9.1” x 5.9” (440 x 230 x 150 mm) |
| Drivers | 120mm woofer + 2x 25mm tweeters | 2x 114mm (4.5”) woofers + 2x 19mm (0.75”) tweeters |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 5.3 |
| Strap | No | Yes (detachable strap) |
| MicroSD Playback | - | No |
| Lights | - | Yes |
Where the Ratings Come From
- Harman Kardon Onyx Studio 7: reviews by Alan Ross, KULAS TECH SHOW and Geri’s Collection.
- Soundcore Boom 2 Plus: reviews by Alan Ross, Techder Audios and Jay’s Straight Up Reviews & More.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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