Ultimate Ears Wonderboom 4 vs B&O Beosound A1 2nd gen

Last updated: August 16, 2026

Short answer: the B&O Beosound A1 2nd gen for better sound quality, the Ultimate Ears Wonderboom 4 for the lower price. The B&O Beosound A1 2nd gen ranks #10 of 136 medium speakers at $200. The Ultimate Ears Wonderboom 4 ranks #84 at $59.99, $140.01 cheaper.

What the Ultimate Ears Wonderboom 4 offers: A small, IP67-rated design that floats and charges over USB-C. Watch for: Its bass does not reach as deep as the top-ranked speakers and sounds a little thuddy; beyond USB-C, it is not much of an upgrade over the Wonderboom 3.

What the B&O Beosound A1 2nd gen offers: The Beosound A1 2nd gen has more neutral tuning, but its bass is limited and pumping artifacts appear above roughly 60% volume.

Buy the Ultimate Ears Wonderboom 4 if the price matters more than sound quality. Buy the B&O Beosound A1 2nd gen if sound quality matters more than the price.

Ultimate Ears Wonderboom 4 vs B&O Beosound A1 2nd gen

Specifications Side By Side

Ultimate Ears Wonderboom 4 B&O Beosound A1 2nd gen
Price$59.99$200
Ranked#84 of 136 in Medium Size Portable Bluetooth Speakers#10 of 136 in Medium Size Portable Bluetooth Speakers
Bass Extension (-10dB)-58Hz
Battery Life-18 hours (Manufacturer specified)
Bluetooth Latency-90ms
Max Volume-93dB
Power Input-USB-C
Stereo-No
Weight-1.2 lbs / 558 g
IP Rating-IP67
Bluetooth Version--
Dimensions--
Drivers-3.5mm aluminium driver + 0.75 inch silk dome tweeter
TWS-Yes
Party Mode--
App-Yes
EQ-Yes
Built in Microphone-Yes
Power Bank-No
Aux Input-No
Digital Aux Input-Yes (USB-C)
Bluetooth Codecs-AAC, aptX Adaptive

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

The Two Speakers In Full

Ultimate Ears Wonderboom 4: $59.99 Amazon

Ultimate Ears Wonderboom 4 ranking card

Pros: Small size.

Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.

App
Aux Input
Bass Extension (-10dB)
Battery Life
Bluetooth Latency
Bluetooth Version
Built in Microphone
Digital Aux Input
Dimensions
Drivers
EQ
IP Rating
Max Volume
Party Mode
Power Bank
Power Input
Stereo
TWS
Weight

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B&O Beosound A1 2nd gen: $200 Amazon

B&O Beosound A1 2nd gen ranking card

Pros: More neutral than the first A1

Cons: Not stereo. Not as deep bass as the A1. Pumping sound artifacts above 60% volume, only good for lower listening levels.

AppYes
Aux InputNo
Bass Extension (-10dB)58Hz
Battery Life18 hours (Manufacturer specified)
Bluetooth CodecsAAC, aptX Adaptive
Bluetooth Latency90ms
Built in MicrophoneYes
Digital Aux InputYes (USB-C)
Drivers3.5mm aluminium driver + 0.75 inch silk dome tweeter
EQYes
IP RatingIP67
Max Volume93dB
Power BankNo
Power InputUSB-C
StereoNo
TWSYes
Weight1.2 lbs / 558 g

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