Short answer: the JBL PartyBox On-The-Go 2 Plus. It ranks #5 of 113 boombox speakers by sound quality, rated 4.4/5, at $349.95. The Zealot S89 ranks #19, rated 4.0/5, at $193.58, $156.37 cheaper, which does not close the gap in sound quality.
The JBL PartyBox On-The-Go 2 Plus is the better-sounding pick. A well balanced karaoke party speaker with clean bass, clear vocals, on-board vocal removal, an included wireless mic and a removable battery. The tradeoff: The bass has less kick and physical impact than the JBL Partybox Encore 2 or JBL Partybox Club 120, and the JBL Partybox Club 120 gets noticeably louder.
The Zealot S89 is the longer-running, tougher option. 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 15 for the JBL PartyBox On-The-Go 2 Plus. It is rated IPX6 against IPX4 for the JBL PartyBox On-The-Go 2 Plus. The catch: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers.
Buy the JBL PartyBox On-The-Go 2 Plus. It is rated higher for sound quality, and saving $156.37 with the Zealot S89 does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 14, 2026 at 6:17 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
| JBL PartyBox On-The-Go 2 Plus | Zealot S89 | |
|---|---|---|
| Price | $349.95 | $193.58 |
| Ranked | #5 of 113 in Boombox Size Portable Bluetooth Speakers | #19 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (JBL One app) | No |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Built-in Microphone | No | No |
| EQ | Yes (app EQ, Deep and Punchy bass boost) | Yes (multiple modes) |
| IP Rating | IPX4 | IPX6 |
| Party Mode | Yes (Auracast) | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-C, 11V/2A) | Yes (USB-A + USB-C) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 14.2 lbs (6.45 kg) | 16.1 lbs (7.3 kg) |
| Wireless Microphones | Yes 1 Included | - |
| Microphone Input | No (wireless only) | - |
| Guitar Input | No | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, LC3 | SBC |
| Bluetooth Version | 5.4 | 5.3 |
| Amplifier Power | 100W RMS | 250W |
| Dimensions | 19.7” x 10.2” x 8.7” (501 x 258 x 221 mm) | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 1x 135mm (5.25”) woofer + 2x 20mm (0.75”) dome tweeters | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| Frequency Response | 40Hz - 20kHz (-6dB, Manufacturer specified) | - |
| Digital Aux Input | Yes (USB-C) | No |
| Lights | Yes | - |
| Strap | Yes (detachable shoulder strap) | No |
| Bass Extension (-10dB) | - | 36Hz |
| MicroSD Playback | - | Yes |
Where the Ratings Come From
- JBL PartyBox On-The-Go 2 Plus: reviews by GYMCADDY and Peter Tyson Audio & Visual.
- Zealot S89: reviews by Joy & Oluv’Sone, Oluv and Dominik.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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