Zealot ZE51 vs S78: Which Is Better? (2026)

Q: Should I buy the Zealot ZE51 or the Zealot S78?

Buy the Zealot ZE51. It is rated higher for sound quality, and the $136.71 you would save on the Zealot S78 does not close the gap.

Short answer: the Zealot ZE51 for sound quality, though the S78 outlasts it on battery. The S78 is rated 120W RMS and 150W peak with a 40-hour battery, a power bank, IP67 waterproofing, dual woofers with tweeters and passive radiators and USB-C charging, but it distorts above 50% and does not have much bass. The ZE51 is cleaner and wider than the ZE41 with less distortion at volume, at the cost of being large and heavy.

Buy the Zealot ZE51. It is rated higher for sound quality, and the $136.71 you would save on the Zealot S78 does not close the gap.

Looking for alternatives? See the complete Portable Bluetooth rankings.

Check Zealot ZE51 price at Amazon ($296.39) →Check Zealot S78 price at Amazon ($159.68) →

Specifications Side By Side

	Zealot ZE51	Zealot S78
Price	$296.39 after coupon	$159.68
Ranked	#16 of 98 in Boombox Size Portable Bluetooth Speakers	#97 of 98 in Boombox Size Portable Bluetooth Speakers
App	Yes	No
Aux Input	Yes	Yes
Battery Capacity	48000mAh (12x4000mAh)	-
Bluetooth	Yes	Yes
Bluetooth Version	5.3	5.3
Dimensions	22.1” x 9.4” x 13” (562 x 238 x 331 mm)	16.1” x 6.6” x 7.3” (410 x 167 x 185 mm)
EQ	Yes (Hi-Res, 3D Surround, Extra Bass, Vocal and other sound modes)	Yes (multiple modes)
Frequency Response	20Hz - 20kHz (Manufacturer specified)	-
IP Rating	IPX5	IP67
Microphone Input	Yes (Karaoke mode)	-
MicroSD Playback	Yes	Yes
Amplifier Power	250W	120W RMS / 150W peak
Power Bank	Yes (USB-A + USB-C)	Yes (USB-A)
Power Input	Type-C	USB-C
Stereo	Yes	Yes
Omnidirectional	No	No
TWS	Yes	Yes
USB Playback	Yes	Yes
Weight	26 lbs (11.81 kg)	9.7 lbs (4.4 kg)
Digital Aux Input	No	No
Bluetooth Codecs	SBC (inferred; additional codecs unverified)	SBC
Drivers	1x 133mm + 2x 93mm + 2x 45mm	2x ~120mm (4.72”) woofers + 2x ~42mm tweeters + 2x passive radiators
Battery Life	4 hours (Manufacturer specified)	40 hours (Manufacturer specified)
Strap	Yes (strap)	Yes (detachable shoulder strap)
Party Mode	-	No
Built-in Microphone	-	No

Check Zealot ZE51 price at Amazon ($296.39) →Check Zealot S78 price at Amazon ($159.68) →

More top alternatives to Zealot ZE51:

Prices on this page were last checked October 13, 2026 at 3:17 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.

As an eBay Partner, we may be compensated if you make a purchase.

The Two Speakers In Full

Zealot ZE51: $296.39 after coupon Amazon $296.39 AliExpress $235.33 eBay

Pros: Cleaner sound and a wider stereo soundstage than the Zealot ZE41, with less distortion at high volume for better instrumental detail and clarity.

Cons: The Zealot ZE41 still wins on raw bass depth and price. Large and heavy like the rest of the boombox class, and clarity still isn’t up to dedicated hi-fi speakers.

Full Zealot ZE51 review and specifications →

Released	Mar 2026 (7 months ago)
Amplifier Power	250W
App	Yes
Aux Input	Yes
Battery Capacity	48000mAh (12x4000mAh)
Battery Life	4 hours (Manufacturer specified)
Bluetooth	Yes
Bluetooth Codecs	SBC (inferred; additional codecs unverified)
Bluetooth Version	5.3
Digital Aux Input	No
Dimensions	22.1” x 9.4” x 13” (562 x 238 x 331 mm)
Drivers	1x 133mm + 2x 93mm + 2x 45mm
EQ	Yes (Hi-Res, 3D Surround, Extra Bass, Vocal and other sound modes)
Frequency Response	20Hz - 20kHz (Manufacturer specified)
IP Rating	IPX5
MicroSD Playback	Yes
Microphone Input	Yes (Karaoke mode)
Omnidirectional	No
Power Bank	Yes (USB-A + USB-C)
Power Input	Type-C
Stereo	Yes
Strap	Yes (strap)
TWS	Yes
USB Playback	Yes
Weight	26 lbs (11.81 kg)

Check current price at Amazon ($296.39) →Check current price at AliExpress ($235.33) →Search eBay for Zealot ZE51 →

Zealot S78: $159.68 Amazon $159.68 AliExpress $91.38 eBay

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 →

Released	May 2023 (3 years ago)
Amplifier Power	120W RMS / 150W peak
App	No
Aux Input	Yes
Battery Life	40 hours (Manufacturer specified)
Bluetooth	Yes
Bluetooth Codecs	SBC
Bluetooth Version	5.3
Built-in Microphone	No
Digital Aux Input	No
Dimensions	16.1” x 6.6” x 7.3” (410 x 167 x 185 mm)
Drivers	2x ~120mm (4.72”) woofers + 2x ~42mm tweeters + 2x passive radiators
EQ	Yes (multiple modes)
IP Rating	IP67
MicroSD Playback	Yes
Omnidirectional	No
Party Mode	No
Power Bank	Yes (USB-A)
Power Input	USB-C
Stereo	Yes
Strap	Yes (detachable shoulder strap)
TWS	Yes
USB Playback	Yes
Weight	9.7 lbs (4.4 kg)

Check current price at Amazon ($159.68) →Check current price at AliExpress ($91.38) →Search eBay for Zealot S78 →

Specifications Side By Side

Related Speaker Comparisons

The Two Speakers In Full

Zealot ZE51: $296.39 after coupon Amazon $296.39 AliExpress $235.33 eBay

Zealot S78: $159.68 Amazon $159.68 AliExpress $91.38 eBay