These sit in different size classes, so this is not a straight ranking comparison. The Onn XL Wireless Party Speaker ranks #11 of 53 party speakers by sound quality at $249; the Harman Kardon Onyx Studio 9 ranks #15 of 113 boombox speakers by sound quality at $184.99.
Very different speakers. The Onn XL is a 44.1 lbs (20 kg) party tower on wheels with two wireless microphones. The Onyx Studio 9 is a 9.3 lbs (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 $184.99 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.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Onn XL Wireless Party Speaker | Harman Kardon Onyx Studio 9 | |
|---|---|---|
| Price | $249.00 | $184.99 |
| Ranked | #11 of 53 in Party Size Portable Bluetooth Speakers | #15 of 113 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 | Yes | Yes |
| 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: