Marshall Emberton III vs Ultimate Ears Megaboom 3

Last updated: August 20, 2026

Short answer: the Ultimate Ears Megaboom 3 for better sound quality, the Marshall Emberton III for the lower price. The Ultimate Ears Megaboom 3 ranks #83 of 136 medium speakers at $163. The Marshall Emberton III ranks #99 at $129.99, $33.01 cheaper.

On the Marshall Emberton III side: 30 hour battery life, among the best in its class; a 20 min quick-charge gives 4 hours. Watch for: Strange unnatural echo-like sound coloration, bass not as deep as competitors.

What the Ultimate Ears Megaboom 3 gets right: IP67 rated, floats, and survives drops from up to 1 meter. The tradeoff: Not stereo, barely any bass.

Buy the Marshall Emberton III if the price matters more than sound quality. Buy the Ultimate Ears Megaboom 3 if sound quality matters more than the price.

If battery life is a priority, the Marshall Emberton III is rated for 32 hours versus 20 hours for the Ultimate Ears Megaboom 3.

Marshall Emberton III vs Ultimate Ears Megaboom 3

Specifications Side By Side

Marshall Emberton III Ultimate Ears Megaboom 3
Price$129.99$163
Ranked#99 of 136 in Medium Size Portable Bluetooth Speakers#83 of 136 in Medium Size Portable Bluetooth Speakers
AppYes-
Bass Extension (-10dB)62Hz70Hz
Battery Life32 hours (Manufacturer specified)20 hours (Manufacturer specified)
Party ModeYes (Marshall Stack)Yes (PartyUp up to 50 speakers)
Weight1.5 lbs / 673 g2 lbs / 925 g
IP RatingIP67IPX7
Bluetooth Version5.34.2
Dimensions6.3" x 2.7" x 3" (160 x 68 x 76 mm)3.4" x 8.9" x 3.4" (87 x 225 x 87 mm)
Drivers2x 2" full-range cone drivers + 2x 2" passive radiators2x 50mm fullrange
TWSNo-
EQYes (3 presets via app)-
Built in MicrophoneYes-
StereoYesNo
OmnidirectionalYesYes
Power InputUSB-CMicro USB
Power BankNo-
Aux InputNo-
Output Power20W-
Bluetooth CodecsSBC-
Digital Aux InputNoNo
Max Volume-98dB
Frequency Response-60Hz - 20kHz (Manufacturer specified)

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

The Two Speakers In Full

Marshall Emberton III: $129.99 Amazon

Marshall Emberton III ranking card

Pros: 30 hour battery life - among the best in its class; a 20 min quick-charge gives 4 hours. IP67 rated, durable rubbery build using 50% recycled plastic.

Cons: Strange unnatural echo-like sound coloration, bass not as deep as competitors. Not technically a 360 speaker, only front and rear. Not very loud. Not really any different from the Emberton II except having the treble turned down a little bit.

AppYes
Aux InputNo
Bass Extension (-10dB)62Hz
Battery Life32 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Version5.3
Built in MicrophoneYes
Digital Aux InputNo
Dimensions6.3" x 2.7" x 3" (160 x 68 x 76 mm)
Drivers2x 2" full-range cone drivers + 2x 2" passive radiators
EQYes (3 presets via app)
IP RatingIP67
OmnidirectionalYes
Output Power20W
Party ModeYes (Marshall Stack)
Power BankNo
Power InputUSB-C
StereoYes
TWSNo
Weight1.5 lbs / 673 g

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Ultimate Ears Megaboom 3: $163 Amazon

Ultimate Ears Megaboom 3 ranking card

Pros: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life - about double most speakers this size.

Cons: Not stereo, barely any bass. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2018. Not technically a 360 speaker, only front and rear.

Bass Extension (-10dB)70Hz
Battery Life20 hours (Manufacturer specified)
Bluetooth Version4.2
Digital Aux InputNo
Dimensions3.4" x 8.9" x 3.4" (87 x 225 x 87 mm)
Drivers2x 50mm fullrange
Frequency Response60Hz - 20kHz (Manufacturer specified)
IP RatingIPX7
Max Volume98dB
OmnidirectionalYes
Party ModeYes (PartyUp up to 50 speakers)
Power InputMicro USB
StereoNo
Weight2 lbs / 925 g

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