Soundcore Flare 2 vs Ultimate Ears Boom 4

Last updated: August 20, 2026

Short answer: the Ultimate Ears Boom 4 for better sound quality, the Soundcore Flare 2 for the lower price. The Ultimate Ears Boom 4 ranks #88 of 136 medium speakers at $105. The Soundcore Flare 2 ranks #105 at $80, $25 cheaper.

The case for the Soundcore Flare 2: Try Alan Ross’s EQ for it. The catch: Rolled off treble.

On the Ultimate Ears Boom 4 side: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. Watch for: Not much improvement over the old ones.

Buy the Soundcore Flare 2 if the price matters more than sound quality. Buy the Ultimate Ears Boom 4 if sound quality matters more than the price.

If sound quality matters at all to you, skip the Soundcore Flare 2. It ranks near the bottom of the 136 medium speakers, so look higher up the list instead.

Buy the Ultimate Ears Boom 4 at Amazon ($105) →Buy the Soundcore Flare 2 at Amazon ($80) →

Soundcore Flare 2 vs Ultimate Ears Boom 4

Specifications Side By Side

Soundcore Flare 2 Ultimate Ears Boom 4
Price$80$105
Ranked#105 of 136 in Medium Size Portable Bluetooth Speakers#88 of 136 in Medium Size Portable Bluetooth Speakers
AppYesYes
Bass Extension (-10dB)56Hz-
Battery Life12 hours (Manufacturer specified)15 hours (Manufacturer specified)
EQYesYes (via app)
Bluetooth Latency80ms-
Max Volume99dB85dBC
Party ModeYes (PartyCast up to 100 speakers)-
Weight1.3 lbs / 600 g1.4 lbs / 620 g
IP RatingIPX7IP67
Bluetooth Version5.05.1
Bluetooth CodecsSBC-
Drivers2x full-range drivers + 2x passive radiators2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators
TWSYesYes
Built in MicrophoneYesNo
StereoYesYes
OmnidirectionalPointing upNo
Power InputUSB-CUSB-C
Output Power20W-
Digital Aux InputNoNo
Dimensions-7.2" x 2.9" x 2.9" (184 x 73 x 73 mm)
Power Bank-No
Aux Input-No
Buy the Ultimate Ears Boom 4 at Amazon ($105) →Buy the Soundcore Flare 2 at Amazon ($80) →

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

The Two Speakers In Full

Soundcore Flare 2: $80 Amazon

Soundcore Flare 2 ranking card

Pros: Try Alan Ross’s EQ for it

Cons: Rolled off treble. Thuddy bass. Not technically a 360 speaker, only front and rear.

Full Soundcore Flare 2 review and specifications →

AppYes
Bass Extension (-10dB)56Hz
Battery Life12 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Latency80ms
Bluetooth Version5.0
Built in MicrophoneYes
Digital Aux InputNo
Drivers2x full-range drivers + 2x passive radiators
EQYes
IP RatingIPX7
Max Volume99dB
OmnidirectionalPointing up
Output Power20W
Party ModeYes (PartyCast up to 100 speakers)
Power InputUSB-C
StereoYes
TWSYes
Weight1.3 lbs / 600 g
Check current price at Amazon ($80) →Search eBay for Soundcore Flare 2 →

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

Ultimate Ears Boom 4: $105 Amazon

Ultimate Ears Boom 4 ranking card

Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.

Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%

Full Ultimate Ears Boom 4 review and specifications →

AppYes
Aux InputNo
Battery Life15 hours (Manufacturer specified)
Bluetooth Version5.1
Built in MicrophoneNo
Digital Aux InputNo
Dimensions7.2" x 2.9" x 2.9" (184 x 73 x 73 mm)
Drivers2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators
EQYes (via app)
IP RatingIP67
Max Volume85dBC
OmnidirectionalNo
Power BankNo
Power InputUSB-C
StereoYes
TWSYes
Weight1.4 lbs / 620 g
Check current price at Amazon ($105) →Search eBay for Ultimate Ears Boom 4 →

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