Short answer: the Harman Kardon Onyx Studio 9, if you are buying new. The Harman Kardon Onyx Studio 6 ranks higher than the Onn Medium Party Speaker Gen 2 (#13 vs #65 of 112 boombox speakers) but is discontinued; its replacement, the Harman Kardon Onyx Studio 9, is rated 4.1/5 at $184.99 and is still sold new.
The Onn Medium Party Speaker Gen 2 is the longer-running pick. An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio. It is rated for 20 hours of battery against 8 for the Harman Kardon Onyx Studio 6. Watch for: Lacking detail compared to the Onn Large Party gen 2 and not as deep of bass.
The Harman Kardon Onyx Studio 6 is the better-sounding, lighter option. A waterproof carry speaker with warm sound, deep bass for its size, and pairing with a second unit. At 6.5 lbs (2.94 kg) it weighs much less than the Onn Medium Party Speaker Gen 2 at 11 lbs (5 kg). Watch for: Warm tuning with boosted bass, and not as loud as others.
Buy the Harman Kardon Onyx Studio 9, the replacement for the discontinued Harman Kardon Onyx Studio 6; it is rated higher for sound quality than the Onn Medium Party Speaker Gen 2.
Want more options? Browse the full Portable Bluetooth rankings.
An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio.
A waterproof carry speaker with warm sound, deep bass for its size, and pairing with a second unit.
Prices on this page were last checked October 31, 2026 at 7:11 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 Medium Party Speaker Gen 2 | Harman Kardon Onyx Studio 6 | |
|---|---|---|
| Price | $90 | $130 Discontinued |
| Ranked | #65 of 112 in Boombox Size Portable Bluetooth Speakers | #13 of 112 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| FM Tuner | Yes (16 presets) | - |
| IP Rating | IPX7 | IPX7 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Party Sync Mode) | Yes (Wireless Dual Sound) |
| Power Bank | Yes (USB-A, 5V/2.1A) | No |
| Power Input | AC Power cord | DC Barrel Connector (19V/2A) |
| Stereo | No | No |
| Omnidirectional | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| TWS | Yes | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) |
| USB Playback | No | No |
| Built-in Microphone | No | Yes |
| Amplifier Power | 50W RMS / 200W peak | 50W RMS |
| Dimensions | 9.6” x 10.9” x 15.1” (244.1 x 277.9 x 383 mm) | 5” x 11.5” x 11.2” (128 x 291 x 284 mm) |
| Weight | 11 lbs (5 kg) | 6.5 lbs (2.94 kg) |
| Drivers | 8” (203mm) woofer + tweeters | 1x 120mm (4.7”) woofer + 1x 25mm (1”) tweeter + 1x passive radiator |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Bass Extension (-10dB) | - | 37Hz |
| Bluetooth Latency | - | 180ms |
| Maximum SPL | - | 96dB (measured by Alan Ross Reviews) |
| Bluetooth Version | - | 4.2 |
| Strap | - | No |
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