Short answer: the Zealot ZE21. It ranks #18 of 112 boombox speakers by sound quality, rated 4.0/5, at $187.15. The Onn Medium Party Speaker Gen 2 ranks #65, rated 3.1/5, at $90, $97.15 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Zealot ZE21 is the better-sounding, longer-running pick. A rugged battery boombox with unusually deep bass, very long battery life, and stereo pairing for party scale sound. It is rated for 40 hours of battery against 20 for the Onn Medium Party Speaker Gen 2. It has an adjustable EQ, which the Onn Medium Party Speaker Gen 2 lacks. It plays in stereo from a single unit, unlike the Onn Medium Party Speaker Gen 2. The tradeoff: That deep-bass emphasis comes with a pronounced 60-110Hz kick-bass dip and over-loud 250-600Hz lower mids, which can make rock and pop sound hollow or boxy.
The Onn Medium Party Speaker Gen 2 is the lighter choice. An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio. At 11 lbs (5 kg) it weighs much less than the Zealot ZE21 at 20.4 lbs (9.27 kg). The catch: Lacking detail compared to the Onn Large Party gen 2 and not as deep of bass.
Buy the Zealot ZE21. It is rated higher for sound quality, and saving $97.15 with the Onn Medium Party Speaker Gen 2 does not make up for the sound-quality gap.
Want more options? Browse the full Portable Bluetooth rankings.
A rugged battery boombox with unusually deep bass, very long battery life, and stereo pairing for party scale sound.
An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio.
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Specifications Side By Side
| Zealot ZE21 | Onn Medium Party Speaker Gen 2 | |
|---|---|---|
| Price | $187.15 | $90 |
| Ranked | #18 of 112 in Boombox Size Portable Bluetooth Speakers | #65 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | - |
| Battery Life | 40 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (multiple modes) | No |
| IP Rating | IPX6 | IPX7 |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Party Sync Mode) |
| Power Input | USB-C | AC Power cord |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 20.4 lbs (9.27 kg) | 11 lbs (5 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Power Bank | Yes (USB-A + USB-C) | Yes (USB-A, 5V/2.1A) |
| USB Playback | Yes | No |
| Built-in Microphone | No | No |
| Amplifier Power | 250W | 50W RMS / 200W peak |
| Dimensions | 16.7” x 10.3” x 14.3” (424 x 262 x 363 mm) | 9.6” x 10.9” x 15.1” (244.1 x 277.9 x 383 mm) |
| Drivers | 130W subwoofer + 2x 50mm woofers + passive radiators | 8” (203mm) woofer + tweeters |
| Maximum SPL | 116dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | - |
| FM Tuner | - | Yes (16 presets) |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Lights | - | Yes |
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