Sony SRS-XB43 vs Ultimate Ears Epicboom

Last updated: August 19, 2026

Short answer: the Sony SRS-XB43. It ranks #42 of 77 large speakers by sound quality at $150; the Ultimate Ears Epicboom ranks #57 and costs $224.64, so there is not much of a tradeoff to weigh.

On the Sony SRS-XB43 side: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. The catch: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.

What the Ultimate Ears Epicboom gets right: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Set against that: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.

Buy the Sony SRS-XB43. It ranks higher for sound quality than the Ultimate Ears Epicboom and costs less, so there is no real case for the other one.

Sony SRS-XB43 vs Ultimate Ears Epicboom

Specifications Side By Side

Sony SRS-XB43 Ultimate Ears Epicboom
Price$150$224.64
Ranked#42 of 77 in Large Size Portable Bluetooth Speakers#57 of 77 in Large Size Portable Bluetooth Speakers
Aux InputYesYes
Bass Extension (-10dB)53Hz~55Hz
Battery Life24 hours (Manufacturer specified)17 hours (Manufacturer specified)
Bluetooth Latency85ms-
Max Volume99dB94dB
Party ModeYes (Party Connect up to 100 speakers)No
Power BankYes (USB-A, 5V/1A)No
Weight6.5 lbs / 2.95 kg4.3 lbs / 1.97 kg
AppYes (Sony Music Center App)No
Bluetooth CodecsSBC, AAC, LDACSBC
Built in MicrophoneYesYes
EQYes (3 band)No
IP RatingIP67IPX7
Power InputUSB-CUSB-C
StereoYesYes
OmnidirectionalNoNo
TWSYesYes
Bluetooth Version5.05.2
Dimensions12.8" x 4.8" x 4.6" (325 x 123 x 117 mm)4.7" x 9.5" x 6.4" (119 x 241 x 162 mm)
Output Power32W RMS10W RMS
Drivers63mm woofer + 12.5mm tweeter + passive radiators1x 120mm woofer, 2x 45mm tweeters
Digital Aux InputNoNo
Frequency Response-50Hz - 20kHz (Manufacturer specified)

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

The Two Speakers In Full

Sony SRS-XB43: $150

Sony SRS-XB43 ranking card

Pros: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. IPX7 waterproof and rugged. Up to 24 hour battery (14 hours with lights on). Party lights for visual appeal.

Cons: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.

Setup: Try out +3 +6 +3 as an EQ to get it as flat as possible as mentioned in the Alan Ross video

AppYes (Sony Music Center App)
Aux InputYes
Bass Extension (-10dB)53Hz
Battery Life24 hours (Manufacturer specified)
Bluetooth CodecsSBC, AAC, LDAC
Bluetooth Latency85ms
Bluetooth Version5.0
Built in MicrophoneYes
Digital Aux InputNo
Dimensions12.8" x 4.8" x 4.6" (325 x 123 x 117 mm)
Drivers63mm woofer + 12.5mm tweeter + passive radiators
EQYes (3 band)
IP RatingIP67
Max Volume99dB
OmnidirectionalNo
Output Power32W RMS
Party ModeYes (Party Connect up to 100 speakers)
Power BankYes (USB-A, 5V/1A)
Power InputUSB-C
StereoYes
TWSYes
Weight6.5 lbs / 2.95 kg

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Ultimate Ears Epicboom: $224.64 Amazon

Ultimate Ears Epicboom ranking card

Pros: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Made mostly from recycled fabric and plastic. Large best-sounding UE portable that still feels portable. 180ft Bluetooth range.

Cons: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.

AppNo
Aux InputYes
Bass Extension (-10dB)~55Hz
Battery Life17 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Version5.2
Built in MicrophoneYes
Digital Aux InputNo
Dimensions4.7" x 9.5" x 6.4" (119 x 241 x 162 mm)
Drivers1x 120mm woofer, 2x 45mm tweeters
EQNo
Frequency Response50Hz - 20kHz (Manufacturer specified)
IP RatingIPX7
Max Volume94dB
OmnidirectionalNo
Output Power10W RMS
Party ModeNo
Power BankNo
Power InputUSB-C
StereoYes
TWSYes
Weight4.3 lbs / 1.97 kg

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