Short answer: the Zealot S89. It ranks #19 of 89 boombox speakers by sound quality, rated 4.0/5, at $259.99. The Pioneer PBM5 ranks #89, rated 2.0/5, at $149, $110.99 cheaper, which does not close the gap in sound quality.
What the Zealot S89 does well: A 7.3kg boombox with a claimed 36Hz bass extension, 40-hour battery life, IPX6 protection, USB-C charging, aux, USB and microSD playback, TWS and multi-speaker PartyAdd. 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.
What the Pioneer PBM5 does well: Loud for its size: Williston Audio Labs measured about 105 dB at 2 meters, louder than the Turtlebox Original Gen3 and Kicker Bullfrog BF400 in the same test. The tradeoff: Williston Audio Labs was not impressed with its sound: there is very little bass below 100Hz, and the amplifier’s output has a big dip from 1.6kHz to 10kHz that leaves the upper mids and treble recessed.
Buy the Zealot S89. It is rated higher for sound quality, and saving $110.99 with the Pioneer PBM5 does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Zealot S89 | Pioneer PBM5 | |
|---|---|---|
| Price | $259.99 | $149.00 |
| Ranked | #19 of 89 in Boombox Size Portable Bluetooth Speakers | #89 of 89 in Boombox Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | - |
| Battery Life | 40 hours (Manufacturer specified) | 13 hours at 60% volume (Manufacturer specified) |
| EQ | Yes (multiple modes) | Yes (presets + user EQ) |
| IP Rating | IPX6 | IPX5 |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Auracast) |
| Power Input | USB-C | USB-C or AC Power cord |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 16.1 lbs (7.3 kg) | 14.1 lbs (6.4 kg) |
| Power Bank | Yes (USB-A + USB-C) | - |
| USB Playback | Yes | Yes (MP3 only) |
| Built-in Microphone | No | - |
| Amplifier Power | 250W | 300W peak (Manufacturer specified), about 90W measured |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) | 8.9”H x 17.4”W x 8.1”D (226 x 442 x 207 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters | 2x 133mm (5.25”) woofers + 2x 51mm (2”) tweeters |
| Digital Aux Input | No | - |
| Bluetooth Version | 5.3 | 5.4 |
| Strap | No | Yes (detachable shoulder strap) |
| Guitar Input | - | Yes |
| Lights | - | Yes |
| Maximum SPL | - | 105dB at 2m (measured by Williston Audio Labs) |
| Microphone Input | - | Yes (2 inputs) |
Related Speaker Comparisons
How Zealot S89 compares with other leading options:
- Tribit Stormbox Blast vs Zealot S89
- Harman Kardon Go + Play 3 vs Zealot S89
- JBL Partybox Encore 2 vs Zealot S89
- JBL PartyBox On-The-Go 2 Plus vs Zealot S89
- JBL Partybox Encore Essential 2 vs Zealot S89
Prices on this page were last checked September 30, 2026 at 2:57 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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The Two Speakers In Full
Zealot S89: $259.99 Amazon AliExpress eBay
Pros: A 7.3kg boombox with a claimed 36Hz bass extension, 40-hour battery life, IPX6 protection, USB-C charging, aux, USB and microSD playback, TWS and multi-speaker PartyAdd. Listener comparisons find it capable of very high output and substantial bass for outdoor use. A great value for its bass, battery life and maximum volume. Measured bass extension of 36Hz (-10dB).
Cons: At high volume, listener reports describe the bass as loose or muddy and the overall balance as less clear than better boombox speakers. The heavy cabinet and basic finish also make it less polished for daily portability, while its multiple EQ modes cannot substitute for a genuinely neutral tuning.
Full Zealot S89 review and specifications →
| Amplifier Power | 250W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 21.2” x 10.4” x 9.4” (538 x 265 x 240 mm) |
| Drivers | 130W subwoofer + 2x 40mm drivers + 2x tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.1 lbs (7.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test More from Oluv’Sone →
- Oluv Patreon: Zealot S89 vs Yeahbox Sonic Boom Max3 - outdoor test
- Dominik Reviews: Zealot S89 vs JBL Boombox 4 - JBL Alternative? Sound Test More from Dominik Reviews →
- Jagist reviews: Jbl Boombox 4 Vs Zealot S89!!! More from Jagistreviews →
- Techder Audios: ZEALOT S89 VS ZEALOT ZE01 EXTREME POWERFULL VS COMPACTER BASS PERFORMANCE! More from techderaudios →
- Head-to-Head Comparisons
Pioneer PBM5: $149.00 Sam’s Club eBay
Pros: Loud for its size: Williston Audio Labs measured about 105 dB at 2 meters, louder than the Turtlebox Original Gen3 and Kicker Bullfrog BF400 in the same test. Two 5.25 inch woofers and two 2 inch tweeters with a port tuned to 48Hz, two microphone inputs plus a guitar input with bass, treble and reverb controls for the mics, aux and USB playback, IPX5 splash resistance, RGB lights, a shoulder strap, Bluetooth 5.4 with Auracast, and charging from either USB-C or the included AC cord. A rated 13 hours at 60% volume.
Cons: Williston Audio Labs was not impressed with its sound: there is very little bass below 100Hz, and the amplifier’s output has a big dip from 1.6kHz to 10kHz that leaves the upper mids and treble recessed. None of the EQ presets fixed it, and a 1990 JVC boombox sounded cleaner. The amp measured about 90W in total, not the claimed 300W, and only about 23W per woofer channel on battery. USB playback is MP3 only, there is no audio output and no microphone in the box, and it is sold only at Sam’s Club.
Full Pioneer PBM5 review and specifications →
| Amplifier Power | 300W peak (Manufacturer specified), about 90W measured |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 13 hours at 60% volume (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Version | 5.4 |
| Dimensions | 8.9”H x 17.4”W x 8.1”D (226 x 442 x 207 mm) |
| Drivers | 2x 133mm (5.25”) woofers + 2x 51mm (2”) tweeters |
| EQ | Yes (presets + user EQ) |
| Guitar Input | Yes |
| IP Rating | IPX5 |
| Lights | Yes |
| Maximum SPL | 105dB at 2m (measured by Williston Audio Labs) |
| Microphone Input | Yes (2 inputs) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C or AC Power cord |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| USB Playback | Yes (MP3 only) |
| Weight | 14.1 lbs (6.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons