Short answer: the Zealot S89. It ranks #19 of 112 boombox speakers by sound quality, rated 4.0/5, at $193.58. The Onn Medium Party Speaker Gen 2 ranks #65, rated 3.1/5, at $90, $103.58 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Zealot S89 is the better-sounding, longer-running choice. A great value boombox with deep bass, very high volume, a 40 hour battery and water resistance for outdoor parties. 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. Watch for: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers.
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 noticeably less than the Zealot S89 at 16.1 lbs (7.3 kg). The catch: Lacking detail compared to the Onn Large Party gen 2 and not as deep of bass.
Buy the Zealot S89. It is rated higher for sound quality, and saving $103.58 with the Onn Medium Party Speaker Gen 2 does not make up for the sound-quality gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A great value boombox with deep bass, very high volume, a 40 hour battery and water resistance for outdoor parties.
An affordable waterproof party speaker with a big woofer, lights, a karaoke mic input and FM radio.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Zealot S89 | Onn Medium Party Speaker Gen 2 | |
|---|---|---|
| Price | $193.58 | $90 |
| Ranked | #19 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 |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| 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 | 16.1 lbs (7.3 kg) | 11 lbs (5 kg) |
| 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 | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) | 9.6” x 10.9” x 15.1” (244.1 x 277.9 x 383 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters | 8” (203mm) woofer + tweeters |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | - |
| Strap | No | - |
| FM Tuner | - | Yes (16 presets) |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Lights | - | Yes |
Related Speaker Comparisons
How Zealot S89 compares with other leading options: