Zealot PT21 vs Bose S1 Pro

Last updated: September 2, 2026

Short answer: the Zealot PT21. It ranks #15 of 51 party speakers by sound quality at $225.86; the Bose S1 Pro+ ranks #16 and costs $699, so there is little reason to consider the other one.

The case for the Zealot PT21: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. The tradeoff: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.

What the Bose S1 Pro gets right: Extremely compact and light with flexible placement options. The catch: With full range music, it becomes distorted above ⅔ volume.

Buy the Zealot PT21. It ranks higher for sound quality than the Bose S1 Pro+ and costs less, so the other one has nothing left to offer.

Water resistance is not close: the Zealot PT21 is rated at IPX5 (water jets), well ahead of the Bose S1 Pro+ at no water resistance.

Buy the Zealot PT21 at Aliexpress ($225.86) →Buy the Bose S1 Pro+ at Amazon ($699.00) →

Zealot PT21 vs Bose S1 Pro+

Specifications Side By Side

Zealot PT21 Bose S1 Pro+
Price$225.86$699.00
Ranked#15 of 51 in Party Size Portable Bluetooth Speakers#16 of 51 in Party Size Portable Bluetooth Speakers
AppNoYes
Aux InputYesYes
Battery Capacity48000mAh (12x4000mAh)-
Bluetooth Version5.35.0
Dimensions21.1" x 8.6" x 11.9" (535 x 219 x 303 mm)13.1" x 9.4" x 11" (332.7 x 238.8 x 279.4 mm)
Drivers2x 166mm woofers + tweeters + midrange drivers1x 6" (152mm) woofer + 3x 2.25" (57mm) tweeters
EQYes (Bass, Voice, Standard modes)Yes
Frequency Response20Hz - 20kHz (Manufacturer specified)-
IP RatingIPX5None
Microphone InputYes (Karaoke mode with echo effect)Yes
MicroSD PlaybackYes-
Output Power200W150W
Party ModeYes (PartyAdd up to 100 speakers)Yes (Bose Party mode)
Power BankYes (USB-A)No
Power InputType-CAC Power cord
StereoYesNo
OmnidirectionalNoNo
TWSYesYes
USB PlaybackYesNo
Weight20.7 lbs / 9.4 kg14.3 lbs / 6.5 kg
Digital Aux InputNoNo
Bass Extension (-10dB)-55Hz
Battery Life-11 hours (Manufacturer specified)
Bluetooth Codecs-AAC, SBC
Charging Time-5 hours
XLR Input-Yes
Max Volume-109dB
Buy the Zealot PT21 at Aliexpress ($225.86) →Buy the Bose S1 Pro+ at Amazon ($699.00) →

More useful head-to-heads from the same speaker class:

Prices on this page were last checked September 2, 2026 at 4:47 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 PT21: $225.86 Aliexpress eBay

Zealot PT21 ranking card

Pros: Dual 166mm woofers and 200W output in a lighter, more compact body than the ZE41, with a bundled wireless microphone and echo effect built in for karaoke. Quite deep bass for the price, even deeper than the JBL Boombox 4 in direct comparisons.

Cons: Unlike some other Zealot models, app-based EQ customization doesn’t appear to be fully supported yet, and IPX5 means it can handle splashes but not submersion.

Full Zealot PT21 review and specifications →

AppNo
Aux InputYes
Battery Capacity48000mAh (12x4000mAh)
Bluetooth Version5.3
Digital Aux InputNo
Dimensions21.1" x 8.6" x 11.9" (535 x 219 x 303 mm)
Drivers2x 166mm woofers + tweeters + midrange drivers
EQYes (Bass, Voice, Standard modes)
Frequency Response20Hz - 20kHz (Manufacturer specified)
IP RatingIPX5
MicroSD PlaybackYes
Microphone InputYes (Karaoke mode with echo effect)
OmnidirectionalNo
Output Power200W
Party ModeYes (PartyAdd up to 100 speakers)
Power BankYes (USB-A)
Power InputType-C
StereoYes
TWSYes
USB PlaybackYes
Weight20.7 lbs / 9.4 kg
Check current price at Aliexpress ($225.86) →Search eBay for Zealot PT21 →

Bose S1 Pro+: $699.00 Amazon eBay

Bose S1 Pro+ ranking card

Pros: Extremely compact and light with flexible placement options. Full sound with no lack of low-end output, crystal-clear audio quality. Three-channel mixer (2 XLR/quarter-inch combo mic-instrument + 1 line/Bluetooth), each with its own OLED display for quick treble/bass/reverb adjustment. Auto EQ adjusts sound based on orientation. Multiple angled surfaces for various positioning including tilted portrait mode, plus a line out to daisy-chain a second unit. Optional WT-XLR/WT-INST wireless transmitters dock, pair, and charge right in the speaker for a cable-free mic or instrument. Up to 11 hours battery life. Professional build quality. High efficiency drivers reach 2-3x the volume of typical speakers for the same wattage.

Cons: With full range music, it becomes distorted above ⅔ volume, and reviewers describe it as screeching at max volume. Better suited for voice amplification. Not as much deep bass as the Everse 8, midrange sounds reasonably balanced. Treble is pretty boosted. Not stereo. Designed for more loudness than deeper bass. Ports are fully exposed with no water resistance. Charges via a less common three-prong AC cable instead of the two-prong barrel cable most rivals use.

Full Bose S1 Pro+ review and specifications →

AppYes
Aux InputYes
Bass Extension (-10dB)55Hz
Battery Life11 hours (Manufacturer specified)
Bluetooth CodecsAAC, SBC
Bluetooth Version5.0
Charging Time5 hours
Digital Aux InputNo
Dimensions13.1" x 9.4" x 11" (332.7 x 238.8 x 279.4 mm)
Drivers1x 6" (152mm) woofer + 3x 2.25" (57mm) tweeters
EQYes
IP RatingNone
Max Volume109dB
Microphone InputYes
OmnidirectionalNo
Output Power150W
Party ModeYes (Bose Party mode)
Power BankNo
Power InputAC Power cord
StereoNo
TWSYes
USB PlaybackNo
Weight14.3 lbs / 6.5 kg
XLR InputYes
Check current price at Amazon ($699.00) →Search eBay for Bose S1 Pro+ →