Marshall Emberton III vs Ultimate Ears Wonderboom 3

Last updated: August 20, 2026

Short answer: the Ultimate Ears Wonderboom 3. It ranks #85 of 136 medium speakers by sound quality at $79.99; 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 offers: 30 hour battery life, among the best in its class; a 20 min quick-charge gives 4 hours. Set against that: Strange unnatural echo-like sound coloration, bass not as deep as competitors.

The case for the Ultimate Ears Wonderboom 3: IP67 rated, floats, and is rated to survive a 5 ft drop onto hard surfaces. The catch: Not stereo, barely any bass.

Buy the Ultimate Ears Wonderboom 3. 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 14 hours for the Ultimate Ears Wonderboom 3.

Marshall Emberton III vs Ultimate Ears Wonderboom 3

Specifications Side By Side

Marshall Emberton III Ultimate Ears Wonderboom 3
Price$129.99$79.99
Ranked#99 of 136 in Medium Size Portable Bluetooth Speakers#85 of 136 in Medium Size Portable Bluetooth Speakers
AppYesNo
Bass Extension (-10dB)62Hz76Hz
Battery Life32 hours (Manufacturer specified)14 hours (Manufacturer specified)
Party ModeYes (Marshall Stack)No
Weight1.5 lbs / 673 g0.9 lbs / 420 g
IP RatingIP67IP67
Bluetooth Version5.35.2
Dimensions6.3" x 2.7" x 3" (160 x 68 x 76 mm)4.1" x 3.8" (104 x 95.3 mm)
Drivers2x 2" full-range cone drivers + 2x 2" passive radiators2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm)
TWSNoYes
EQYes (3 presets via app)No
Built in MicrophoneYesNo
StereoYesNo
OmnidirectionalYesYes
Power InputUSB-CMicro USB
Power BankNoNo
Aux InputNoNo
Output Power20W-
Bluetooth CodecsSBC-
Digital Aux InputNoNo
Bluetooth Latency-166ms
Max Volume-87dB

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 3: $79.99 Amazon

Ultimate Ears Wonderboom 3 ranking card

Pros: IP67 rated, floats, and is rated to survive a 5 ft drop onto hard surfaces. 14 hour battery - longer than the Wonderboom 2.

Cons: Not stereo, barely any bass. Boosted 93hz upper bass. Cuts bass heavily at high volume. 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 2022. Not technically a 360 speaker, only front and rear.

AppNo
Aux InputNo
Bass Extension (-10dB)76Hz
Battery Life14 hours (Manufacturer specified)
Bluetooth Latency166ms
Bluetooth Version5.2
Built in MicrophoneNo
Digital Aux InputNo
Dimensions4.1" x 3.8" (104 x 95.3 mm)
Drivers2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm)
EQNo
IP RatingIP67
Max Volume87dB
OmnidirectionalYes
Party ModeNo
Power BankNo
Power InputMicro USB
StereoNo
TWSYes
Weight0.9 lbs / 420 g

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