onn Pro X Large Boom Boombox vs Zealot S78

Last updated: October 5, 2026

Short answer: the onn Pro X Large Boom Boombox. It ranks #44 of 91 boombox speakers by sound quality, rated 3.4/5, at $199. The Zealot S78 ranks #90, rated 2.0/5, at $159.68, $39.32 cheaper, a saving that is not big enough to make up the sound-quality gap.

onn Pro X Large Boom Boombox vs Zealot S78

The onn Pro X Large Boom Boombox is the better-sounding choice. High rated power for the price at 180W RMS (540W peak). It links with other speakers (Auracast), which the Zealot S78 cannot. The tradeoff: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.

The Zealot S78 is the longer-running, lighter choice. A robust 9.7 lbs (4.4 kg) party speaker with claimed 120W RMS output, IP67 protection, USB-C charging, a power-bank function, aux, USB and microSD playback, TWS pairing and multiple EQ modes. It is rated for 40 hours of battery against 20 for the onn Pro X Large Boom Boombox. At 9.7 lbs (4.4 kg) it weighs much less than the onn Pro X Large Boom Boombox at 17.2 lbs (7.8 kg). Watch for: At high volume, reviews report distortion and fluctuating level, so its headline power is more useful below its maximum setting.

Buy the onn Pro X Large Boom Boombox. It is rated higher for sound quality, and the $39.32 saving on the Zealot S78 is not enough to make up the difference.

Want more options? Browse the full Portable Bluetooth rankings.

Check onn Pro X Large Boom Boombox price at Walmart ($199.00) →Check Zealot S78 price at Amazon ($159.68) →

Specifications Side By Side

onn Pro X Large Boom Boombox Zealot S78
Price$199.00$159.68
Ranked#44 of 91 in Boombox Size Portable Bluetooth Speakers#90 of 91 in Boombox Size Portable Bluetooth Speakers
Battery Life20 hours (Manufacturer specified)40 hours (Manufacturer specified)
IP RatingIP67IP67
Amplifier Power180W RMS (540W peak)120W RMS / 150W peak
Weight17.2 lbs (7.8 kg)9.7 lbs (4.4 kg)
Dimensions20.1” x 10.3” x 9” (510 x 261 x 228 mm)16.1” x 6.6” x 7.3” (410 x 167 x 185 mm)
Drivers5 speakers2x ~120mm (4.72”) woofers + 2x ~42mm tweeters + 2x passive radiators
Power InputAC Power cordUSB-C
Removable BatteryNo-
Party ModeYes (Auracast)No
Aux InputYesYes
Power BankYes (USB-A, 5V/2A)Yes (USB-A)
TWSYesYes
BluetoothYesYes
Bluetooth Version5.4 (Manufacturer specified)-
Frequency Response50Hz - 20kHz (Manufacturer specified)-
OmnidirectionalNoNo
Bluetooth CodecsSBC (inferred; additional codecs unverified)SBC
LightsYes-
Digital Aux InputNoNo
EQYes (Bass Boost)Yes (multiple modes)
MicroSD Playback-Yes
Stereo-Yes
App-No
USB Playback-Yes
Built-in Microphone-No
Strap-Yes (detachable shoulder strap)
Check onn Pro X Large Boom Boombox price at Walmart ($199.00) →Check Zealot S78 price at Amazon ($159.68) →

More top alternatives to onn Pro X Large Boom Boombox:

Prices on this page were last checked October 4, 2026 at 9:58 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

onn Pro X Large Boom Boombox: $199.00 Walmart eBay

onn Pro X Large Boom Boombox ranking card

Pros: High rated power for the price at 180W RMS (540W peak). IP67 waterproof design for indoor and outdoor use. 20 hour battery life. 6 LED lighting modes. Party Mode supports multiple devices.

Cons: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast. Frequency response isn’t as smooth as the top ranked speakers. Charges via AC cable rather than USB-C. Only available in the United States and Canada.

Full onn Pro X Large Boom Boombox review and specifications →

Amplifier Power180W RMS (540W peak)
Aux InputYes
Battery Life20 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC (inferred; additional codecs unverified)
Bluetooth Version5.4 (Manufacturer specified)
Digital Aux InputNo
Dimensions20.1” x 10.3” x 9” (510 x 261 x 228 mm)
Drivers5 speakers
EQYes (Bass Boost)
Frequency Response50Hz - 20kHz (Manufacturer specified)
IP RatingIP67
LightsYes
OmnidirectionalNo
Party ModeYes (Auracast)
Power BankYes (USB-A, 5V/2A)
Power InputAC Power cord
Removable BatteryNo
TWSYes
Weight17.2 lbs (7.8 kg)
Check current price at Walmart ($199.00) →Search eBay for onn Pro X Large Boom Boombox →

Zealot S78: $159.68 Amazon AliExpress eBay

Zealot S78 ranking card

Pros: A robust 4.4kg party speaker with claimed 120W RMS output, IP67 protection, USB-C charging, a power-bank function, aux, USB and microSD playback, TWS pairing and multiple EQ modes. Reviews find it very loud with useful bass and long claimed battery life, making it a credible choice for outdoor gatherings.

Cons: At high volume, reviews report distortion and fluctuating level, so its headline power is more useful below its maximum setting. It has no app-based EQ, and the bass and midrange refinement do not match better-established boombox speakers; assess its sound in person if tonal accuracy matters.

Full Zealot S78 review and specifications →

Amplifier Power120W RMS / 150W peak
AppNo
Aux InputYes
Battery Life40 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC
Built-in MicrophoneNo
Digital Aux InputNo
Dimensions16.1” x 6.6” x 7.3” (410 x 167 x 185 mm)
Drivers2x ~120mm (4.72”) woofers + 2x ~42mm tweeters + 2x passive radiators
EQYes (multiple modes)
IP RatingIP67
MicroSD PlaybackYes
OmnidirectionalNo
Party ModeNo
Power BankYes (USB-A)
Power InputUSB-C
StereoYes
StrapYes (detachable shoulder strap)
TWSYes
USB PlaybackYes
Weight9.7 lbs (4.4 kg)
Check current price at Amazon ($159.68) →Check current price at AliExpress ($91.38) →Search eBay for Zealot S78 →
Top Pickonn Pro X Large Boom BoomboxWalmart • $199.00
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