These sit in different size classes, so this is not a straight ranking comparison. The Onn XL Wireless Party Speaker ranks #11 of 40 party speakers by sound quality at $249; the Harman Kardon Onyx Studio 9 ranks #15 of 76 boombox speakers by sound quality at $189.99.
Very different speakers. The Onn XL is a 20 kg party tower on wheels with two wireless microphones. The Onyx Studio 9 is a 4.2 kg living room portable. Each is rated within its own class.
The Onyx Studio 9 is the music speaker. It is balanced and smooth with non-fatiguing treble, bass to about 41Hz, and about 101dB measured. It has no water rating, no aux input and a claimed 8 hours.
The Onn XL is the party speaker, loud with punchy bass, dual mic and guitar inputs, lights and a claimed 16 hours. Its top end is bright and some owners report distortion at high volume.
Buy the Onn XL Wireless Party Speaker at $249 for a party speaker, or the Harman Kardon Onyx Studio 9 at $189.99 for a boombox speaker instead.
Water resistance is not close: the Onn XL Wireless Party Speaker is rated at IPX4 (splashing), well ahead of the Harman Kardon Onyx Studio 9 at no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Onn XL Wireless Party Speaker | Harman Kardon Onyx Studio 9 | |
|---|---|---|
| Price | $249.00 | $189.99 |
| Ranked | #11 of 40 in Party Size Portable Bluetooth Speakers | #15 of 76 in Boombox Size Portable Bluetooth Speakers |
| Weight | 44 lbs (19.96 kg) | 9.3 lbs (4.2 kg) |
| Dimensions | 30.1”H x 15.7”W x 15.5”D (765.0 x 400.0 x 392.9 mm) | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) |
| Drivers | Dual 8” (203mm) woofers + dual 2” (51mm) tweeters | 120mm woofer + 3x 20mm tweeters |
| Amplifier Power | 240W | 50W RMS |
| Battery Life | 16 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IPX4 | None |
| Microphone Input | Yes (2 inputs, karaoke mode) | - |
| Wireless Microphones | Yes 2 Included | - |
| Guitar Input | Yes | - |
| Power Input | AC Power cord | AC Power Cable (2-Prong) |
| Power Bank | Yes (USB-A) | - |
| Aux Input | Yes | No |
| Removable Battery | No | - |
| Omnidirectional | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Wheels | Yes | - |
| App | Yes | Yes (Harman Kardon One app) |
| EQ | Yes | Yes (App EQ) |
| Stereo | Yes | Yes |
| TWS | Yes | Yes |
| Digital Aux Input | No | No |
| Strap | No | No |
| Bass Extension (-10dB) | - | 41Hz |
| Maximum SPL | - | 101dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Auracast) |
| USB Playback | - | No |
| Bluetooth Version | - | 5.3 |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 9 compares with other leading options:
- Earfun Uboom X vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs Tribit Stormbox Blast
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 9
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs JBL Partybox Encore Essential 2
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
Onn XL Wireless Party Speaker: $249.00 Walmart eBay
Pros: A compelling all-in-one party and karaoke package: dual 8-inch woofers, 240W claimed output, two included wireless microphones, dual mic/guitar inputs, karaoke effects and USB-A phone charging. It plays loudly enough for backyard use and has punchy bass; owners especially like the wheels, telescoping handle and colorful light effects. At 44 lb it is still a substantial cabinet, but the trolley design makes moving it far easier than carrying it.
Cons: Sound favors punch and a forward/bright top end over refinement. Independent comparisons and owner reports find the bass less deep and the overall balance less satisfying than the JBL PartyBox 320; several consider the far-cheaper Onn Large Party gen 2 the better sound-per-dollar buy. Some owners report distortion or static at high volume, and a few report wireless-mic pairing/dropout problems. Large (30 inches tall, 44 lb) and only IPX4 splash-resistant, not a speaker to leave out in rain.
Full Onn XL Wireless Party Speaker review and specifications →
| Amplifier Power | 240W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Digital Aux Input | No |
| Dimensions | 30.1”H x 15.7”W x 15.5”D (765.0 x 400.0 x 392.9 mm) |
| Drivers | Dual 8” (203mm) woofers + dual 2” (51mm) tweeters |
| EQ | Yes |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes (2 inputs, karaoke mode) |
| Omnidirectional | No |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 44 lbs (19.96 kg) |
| Wheels | Yes |
| Wireless Microphones | Yes 2 Included |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: ONN XL Party Speaker Review & Demo 😲 Is This The Next Big Thing In Party/Karaoke Speakers? More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: ONN XL Party Speaker vs. Two Large Gen. 2 Party Speakers. ONN With The Showdown🔌 Plugged In
- Jay’s Straight Up Reviews & More: ONN XL Party Speaker vs JBL Partybox 320. Outdoors, Battery Powered.
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Harman Kardon Onyx Studio 9: $189.99 Amazon eBay
Older models: the Harman Kardon Onyx Studio 8 (rated 4.1/5), the Harman Kardon Onyx Studio 7 (rated 4.1/5), the Harman Kardon Onyx Studio 6 (rated 4.1/5), the Harman Kardon Onyx Studio 5 (rated 3.9/5) and the Harman Kardon Onyx Studio 4 (rated 3.3/5).
Pros: An elegant 4.2kg living-room portable with a measured 41Hz -10dB bass point, 101dB maximum level, three tweeters, app EQ, stereo pairing and Auracast multi-speaker linking. Reviews praise its balanced, smooth presentation and non-fatiguing treble, making it a more music-focused choice than most party speakers. Measured bass extension of 41Hz (-10dB).
Cons: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable. Bass is less deep than some earlier Onyx Studio models, while the slightly recessed mids and rolled-off top end mean it is not the most open or detailed option; it still charges from an AC power cable rather than USB-C.
Full Harman Kardon Onyx Studio 9 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | Yes (Harman Kardon One app) |
| Aux Input | No |
| Bass Extension (-10dB) | 41Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | AC Power Cable (2-Prong) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 9.3 lbs (4.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 9 vs Harman Kardon Onyx Studio 7
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