Marshall Emberton III vs Ultimate Ears Wonderboom

Last updated: August 20, 2026

Short answer: the Ultimate Ears Wonderboom. It ranks #87 of 136 medium speakers by sound quality at $79; the Marshall Emberton III ranks #99 and costs $129.99, so there is not much of a tradeoff to weigh.

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

What the Ultimate Ears Wonderboom offers: IP67 rated and floats. Set against that: Not stereo, barely any bass, recessed treble.

One note: the Ultimate Ears Wonderboom is discontinued, but it still ranks #87 of 136 medium speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.

Buy the Ultimate Ears Wonderboom. It ranks higher for sound quality than the Marshall Emberton III and costs less, so there is no real case for the other one.

If battery life is a priority, the Marshall Emberton III is rated for 32 hours versus 10 hours for the Ultimate Ears Wonderboom.

Marshall Emberton III vs Ultimate Ears Wonderboom

Specifications Side By Side

Marshall Emberton III Ultimate Ears Wonderboom
Price$129.99$79 Discontinued
Ranked#99 of 136 in Medium Size Portable Bluetooth Speakers#87 of 136 in Medium Size Portable Bluetooth Speakers
AppYesNo
Bass Extension (-10dB)62Hz-
Battery Life32 hours (Manufacturer specified)10 hours (Manufacturer specified)
Party ModeYes (Marshall Stack)No
Weight1.5 lbs / 673 g0.9 lbs / 425 g
IP RatingIP67IPX7
Bluetooth Version5.3-
Dimensions6.3" x 2.7" x 3" (160 x 68 x 76 mm)-
Drivers2x 2" full-range cone drivers + 2x 2" passive radiators2x 1.6" active drivers + 2x 1.8" x 2.6" passive radiators
TWSNoYes
EQYes (3 presets via app)No
Built in MicrophoneYesNo
StereoYesNo
OmnidirectionalYesYes
Power InputUSB-CMicro USB
Power BankNo-
Aux InputNo-
Output Power20W-
Bluetooth CodecsSBC-
Digital Aux InputNoNo
Discontinued-Yes

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 Wonderboom: $79 Discontinued

Ultimate Ears Wonderboom ranking card

Pros: IP67 rated and floats. Compact, light, and simple to use.

Cons: Not stereo, barely any bass, recessed treble. Dip at 9khz. Low mid bass distortion. Not technically a 360 speaker, only front and rear. Discontinued.

AppNo
Battery Life10 hours (Manufacturer specified)
Built in MicrophoneNo
Digital Aux InputNo
DiscontinuedYes
Drivers2x 1.6" active drivers + 2x 1.8" x 2.6" passive radiators
EQNo
IP RatingIPX7
OmnidirectionalYes
Party ModeNo
Power InputMicro USB
StereoNo
TWSYes
Weight0.9 lbs / 425 g

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