These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox 330 ranks #2 of 40 party speakers by sound quality at $549.95; the Harman Kardon Onyx Studio 7 ranks #14 of 76 boombox speakers by sound quality at $248.90.
Why pick the JBL Partybox 330: A highly complete rolling party speaker: removable battery, telescoping handle and wheels, light show, Auracast, USB-C lossless and optical inputs, plus dual mic/guitar inputs. The catch: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational.
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. The tradeoff: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested.
Buy the JBL Partybox 330 ($549.95) for a party speaker; the Harman Kardon Onyx Studio 7 ($248.90) suits a boombox speaker instead.
If battery life is a priority, the JBL Partybox 330 is rated for 18 hours versus 8 hours for the Harman Kardon Onyx Studio 7.
If water resistance matters to you, the JBL Partybox 330 at IPX4 (splashing) holds up far better than the Harman Kardon Onyx Studio 7 at no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox 330 | Harman Kardon Onyx Studio 7 | |
|---|---|---|
| Price | $549.95 | $248.90 |
| Ranked | #2 of 40 in Party Size Portable Bluetooth Speakers | #14 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 6.0 | 4.2 |
| Charging Time | 3 hours | - |
| Drivers | 2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters | 120mm woofer + 2x 25mm tweeters |
| EQ | Yes (Smart EQ mode) | No |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | None |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Inputs | Optical | - |
| Party Mode | Yes (Auracast) | Yes (Wireless Dual Sound) |
| Power Bank | Yes (USB-C, 5V/1A) | No |
| Power Input | AC Power cord | DC Barrel Connector (19V/2.1A) |
| Removable Battery | Yes | - |
| Stereo | Partially | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 37.7 lbs (17.1 kg) | 6.4 lbs (2.9 kg) |
| Amplifier Power | 280W | 50W RMS |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Wheels | Yes | - |
| Dimensions | 26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm) | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) |
| Strap | No | No |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 37Hz |
| Built-in Microphone | - | Yes |
| Bluetooth Latency | - | 266ms |
| Maximum SPL | - | 96dB (measured by Alan Ross Reviews) |
Related Speaker Comparisons
How JBL Partybox 330 compares with other leading options:
- Sony ULT Tower 7 vs JBL Partybox 330
- JBL Partybox 330 vs JBL Partybox Stage 320
- JBL Partybox 310 vs JBL Partybox 330
- Sony ULT Tower 5 vs JBL Partybox 330
- JBL Partybox 330 vs JBL Partybox Club 120
Prices on this page were last checked September 26, 2026 at 11:14 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
JBL Partybox 330: $549.95 Amazon B&H Photo Video eBay
Pros: A highly complete rolling party speaker: removable battery, telescoping handle and wheels, light show, Auracast, USB-C lossless and optical inputs, plus dual mic/guitar inputs. It supplies a little more power than the JBL Partybox 310 and JBL Partybox Stage 320, while reviewers report better midrange clarity than the older JBL Partybox 310 and the same deep party-speaker bass.
Cons: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational. JBL removed the dedicated mic gain/control knobs found on earlier models, a real drawback for frequent karaoke use. Do not upgrade from a JBL Partybox 310 or JBL Partybox Stage 320 just for the higher watt figure.
Full JBL Partybox 330 review and specifications →
| Amplifier Power | 280W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 6.0 |
| Charging Time | 3 hours |
| Digital Aux Input | No |
| Dimensions | 26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm) |
| Drivers | 2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters |
| EQ | Yes (Smart EQ mode) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Inputs | Optical |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C, 5V/1A) |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Partially |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 37.7 lbs (17.1 kg) |
| Wheels | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Partybox 330 vs JBL Partybox Stage 320
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Harman Kardon Onyx Studio 7: $248.90 Amazon eBay
Newer model: the Harman Kardon Onyx Studio 9, 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 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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