Short answer: the Zealot ZE21 on measured sound quality, the Soundcore Motion Boom+ on price. The Zealot ZE21 ranks #15 of 73 boombox speakers at $247.41. The Soundcore Motion Boom+ ranks #47 at $140, $107.41 cheaper.
What the Zealot ZE21 offers: Great value for the bass performance, play time and max volume in the boombox class, though the Zealot ZE41 now beats it out. Watch for: A little rolled off up top and not that balanced through the rest of the range. Clarity isn’t as good as better speakers. Bass EQ is bloated and muddy sounding
What the Soundcore Motion Boom+ offers: 80W stereo from dual 30W woofers + dual 10W tweeters with titanium drivers for treble clarity. 13,400mAh battery for 20 hours (12-15 at high volume). IP67 waterproof, floats, rugged build inspires confidence. Bluetooth 5.3 multipoint pairing, Soundcore app EQ, PartyCast 2.0 mode. USB-C input, USB-A output for powerbank. Watch for: Default presets are all warm sounding with rolled off treble. Will need a custom EQ to get closer to neutral. A shrill sounding 6khz peak comes out when volume is above about 60%. Not much deeper bass than a Motion Boom and a lot less deep bass than other speakers in the class.
Buy the Zealot ZE21 if sound quality is the priority over the price, or the Soundcore Motion Boom+ if the price is the priority over sound quality.
Battery life favors the Zealot ZE21: rated for 40 hours against 20 hours for the Soundcore Motion Boom+.
Specifications Side By Side
| Zealot ZE21 | Soundcore Motion Boom+ | |
|---|---|---|
| Price | $247.41 | $140 after $40 coupon, Discontinued |
| Ranked | #15 of 73 in Boombox Size Portable Bluetooth Speakers | #47 of 73 in Boombox Size Portable Bluetooth Speakers |
| App | No | Yes (Soundcore app) |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | 52Hz |
| Battery Life | 40 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (multiple modes) | Yes (App EQ) |
| IP Rating | IPX6 | IP67 |
| MicroSD Playback | Yes | - |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (PartyCast up to 100 speakers) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 20.4 lbs / 9.27 kg | 5.3 lbs / 2.4 kg |
| 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 |
| Output Power | 250W | 80W |
| Dimensions | 16.7" x 10.3" x 14.3" (424 x 262 x 363 mm) | 15.1" x 5.1" x 7.7" (384 x 130 x 196 mm) |
| Drivers | 130W subwoofer + 2x 50mm woofers + passive radiators | 30W: Dual drivers |
| Max Volume | 116dB | 108dB |
| Digital Aux Input | No | No |
| Aux Latency | - | 17ms |
| Bluetooth Latency | - | 33ms |
| Bluetooth Version | - | 5.3 |
| Discontinued | - | Yes |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- Zealot ZE41 vs W-King D10
- Zealot S89 vs W-King X10-1
- Zealot S89 vs W-King T11
- Zealot S89 vs Soundcore Motion Boom+
- Zealot ZE21 vs W-King X10-1
Prices on this page were last checked August 27, 2026 at 10:09 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 ZE21: $247.41 Amazon Aliexpress eBay
Pros: Great value for the bass performance, play time and max volume in the boombox class, though the Zealot ZE41 now beats it out.
Cons: A little rolled off up top and not that balanced through the rest of the range. Clarity isn’t as good as better speakers. Bass EQ is bloated and muddy sounding
Full Zealot ZE21 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.7" x 10.3" x 14.3" (424 x 262 x 363 mm) |
| Drivers | 130W subwoofer + 2x 50mm woofers + passive radiators |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| Max Volume | 116dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 250W |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 20.4 lbs / 9.27 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Jbl Boombox 4 Vs Zealot Ze21!!! More from Jagistreviews →
- Jagist reviews: Zealot Ze21 Vs Tribit Stormbox Blast 2!!!
- Techder Audios: JBL Boombox 4 VS Zealot ZE21 BATTLE OF THE BOOMBOXES! More from techderaudios →
- Jay’s Straight Up Reviews & More: Zealot ZE21 vs JBL Boombox 3 Tailgater Special @20ft. The Budget Beast Against the OG Boombox More from JaysStraightUpReviews →
- Reddit Search for Zealot ZE21 Review
- Head-to-Head Comparisons
- Zealot ZE21 vs Zealot ZE41
- Zealot ZE21 vs Zealot S89
- Zealot ZE21 vs JBL Boombox 4
- Zealot ZE21 vs Harman Kardon Onyx Studio 9
- Zealot ZE21 vs Harman Kardon Onyx Studio 7
- Zealot ZE21 vs Harman Kardon Go + Play 2
- Zealot ZE21 vs Harman Kardon Onyx Studio 6
- Zealot ZE21 vs Harman Kardon Onyx Studio 5
- See all 44 comparisons
Soundcore Motion Boom+: $140 after $40 coupon, Discontinued Amazon eBay
Pros: 80W stereo from dual 30W woofers + dual 10W tweeters with titanium drivers for treble clarity. 13,400mAh battery for 20 hours (12-15 at high volume). IP67 waterproof, floats, rugged build inspires confidence. Bluetooth 5.3 multipoint pairing, Soundcore app EQ, PartyCast 2.0 mode. USB-C input, USB-A output for powerbank.
Cons: Default presets are all warm sounding with rolled off treble. Will need a custom EQ to get closer to neutral. A shrill sounding 6khz peak comes out when volume is above about 60%. Not much deeper bass than a Motion Boom and a lot less deep bass than other speakers in the class. Discontinued.
Full Soundcore Motion Boom+ review and specifications →
| App | Yes (Soundcore app) |
|---|---|
| Aux Input | Yes |
| Aux Latency | 17ms |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 33ms |
| Bluetooth Version | 5.3 |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 15.1" x 5.1" x 7.7" (384 x 130 x 196 mm) |
| Discontinued | Yes |
| Drivers | 30W: Dual drivers |
| EQ | Yes (App EQ) |
| IP Rating | IP67 |
| Max Volume | 108dB |
| Omnidirectional | No |
| Output Power | 80W |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 5.3 lbs / 2.4 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Soundcore Motion Boom Plus & Earfun UBoom X - sound test More from Oluv’Sone →
- Alan Ross Reviews: Tribit Stormbox Blast or Soundcore Motion Boom Plus or W King D10? 🤪 More from alanrossreviews →
- Alan Ross Reviews: Tribit Stormbox Blast Review vs Soundcore Motion Boom Plus - cheap bass!
- DLX Willington: Tough Game! Tribit Stormbox Blast vs Soundcore Motion Boom Plus Binaural sound samples More from DLXWillington →
- Reddit Search for Soundcore Motion Boom+ Review
- Head-to-Head Comparisons
- Soundcore Motion Boom+ vs JBL Boombox
- Soundcore Motion Boom+ vs Sony SRS-XG500
- Soundcore Motion Boom+ vs JBL Partybox On the Go
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- Soundcore Motion Boom+ vs W-King H10
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- Soundcore Motion Boom+ vs Sony ULT Field 7
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- See all 47 comparisons