These are not really the same size class, and that is the honest framing here. The Harman Kardon Onyx Studio 7 ranks #14 of 91 boombox speakers by sound quality at $248.90; the Harman Kardon Onyx Studio 4 ranks #65 of 102 large speakers by sound quality at $100.
Why pick the Harman Kardon Onyx Studio 7: The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. Watch for: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested.
The Harman Kardon Onyx Studio 4 is the lighter option. Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. At 4.5 lbs (2.06 kg) it weighs noticeably less than the Harman Kardon Onyx Studio 7 at 6.4 lbs (2.9 kg). Watch for: 8 hour battery at medium volume.
One note: the Harman Kardon Onyx Studio 4 is discontinued and no longer widely available new.
Buy the Harman Kardon Onyx Studio 7 ($248.90) for a boombox speaker; the Harman Kardon Onyx Studio 4 ($100) suits a large speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Harman Kardon Onyx Studio 7 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $248.90 | $100 Discontinued |
| Ranked | #14 of 91 in Boombox Size Portable Bluetooth Speakers | #65 of 102 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 37Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| IP Rating | None | None |
| Bluetooth Latency | 266ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wireless Dual Sound) | Yes (Connect+ up to 100 speakers) |
| Power Input | DC Barrel Connector (19V/2.1A) | DC Barrel Connector (19V/2.1A) |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 6.4 lbs (2.9 kg) | 4.5 lbs (2.06 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (HK Connect) |
| EQ | No | No |
| Power Bank | No | No |
| USB Playback | No | - |
| Amplifier Power | 50W RMS | 60W |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) |
| Drivers | 120mm woofer + 2x 25mm tweeters | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| Digital Aux Input | No | No |
| Bluetooth Version | 4.2 | 4.2 |
| Strap | No | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
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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
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Harman Kardon Onyx Studio 4: $100 Discontinued eBay
Newer model: the Harman Kardon Onyx Studio 9, rated 4.1/5.
Pros: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Multi-host Bluetooth connectivity for 2 phones, daisy chaining up to 100 speakers. Elegant modern design with smooth curves and premium materials.
Cons: 8 hour battery at medium volume. Not at loud as others. Not as deep of bass as the newer Onyx. External AC power brick for charging. Discontinued.
Full Harman Kardon Onyx Studio 4 review and specifications →
| Amplifier Power | 60W |
|---|---|
| App | Yes (HK Connect) |
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 4.5 lbs (2.06 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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