Short answer: the Ultimate Ears Boom 4 for clearer sound and USB-C charging, though neither ranks well in its class. It is IP67 rated, floats and charges over USB-C, though it is not much improved over the old Booms. The Sony SRS-XE300 is also IP67 rated but is muffled sounding with not very deep bass. Both are rated below 3.0/5 among the 151 medium speakers; for better sound, the Earfun Uboom L ranks #1 at $49.79.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality, and the Sony SRS-XE300 is discontinued, so it is only available used.
Battery life favors the Sony SRS-XE300: rated for 24 hours against 15 hours for the Ultimate Ears Boom 4.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Ultimate Ears Boom 4 | Sony SRS-XE300 | |
|---|---|---|
| Price | $149.99 | $97.71 Discontinued |
| Ranked | #100 of 151 in Medium Size Portable Bluetooth Speakers | #104 of 151 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Sony Music Center) |
| Battery Life | 15 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 2.9 lbs (1.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.2 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 9.4” x 4.1” x 4.7” (238 x 105 x 119 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 2x 49x71mm X-Balanced speaker units + 2x passive radiators |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes (via app) |
| Built-in Microphone | No | Yes |
| Power Bank | No | No |
| Aux Input | No | No |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Strap | Yes (built-in loop) | - |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Amplifier Power | - | 16W |
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Prices on this page were last checked October 2, 2026 at 10:18 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Ultimate Ears Boom 4: $149.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
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 →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Boom 4 vs Ultimate Ears Boom 3
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 4 vs Klipsch Groove/Heritage Groove
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Boom 4 vs DBSONO X-Blast F37
- Ultimate Ears Boom 4 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs Tribit Stormbox
- See all 133 comparisons
Sony SRS-XE300: $97.71 Discontinued Amazon eBay
Newer model: the Sony ULT Field 3, ranked higher, rated 3.4/5.
Pros: IP67 rated. Orientation-aware playback switches to stereo when laid flat. Party Connect links up to 100 speakers; fast charging (10 min charge = ~70 min playback).
Cons: Muffled sounding, not very deep bass. Hollow sounding. Worse than a XB43. Discontinued.
Full Sony SRS-XE300 review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | Yes (Sony Music Center) |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.4” x 4.1” x 4.7” (238 x 105 x 119 mm) |
| Drivers | 2x 49x71mm X-Balanced speaker units + 2x passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.9 lbs (1.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- New Stuff TV: Sony SRS-XE300 vs JBL Charge 5 More from NewStuffTV1 →
- DLX Willington: FINALLY! Sony SRS XG300, SRS XE300, & SRS XE200 Are Here. Binaural Sound Samples & First Impressions More from DLXWillington →
- GYMCADDY: Sony XE300 Review And Compared to Sony XB33 - A Muffled Mess More from GYMCADDY →
- GYMCADDY: JBL Charge 5 Vs Sony XE300 - How Can You Mess Up This Bad?
- Head-to-Head Comparisons
- Sony SRS-XE300 vs DBSONO X-Blast F37
- Sony SRS-XE300 vs Tribit Stormbox
- Sony SRS-XE300 vs Sony SRS-XB20
- Sony SRS-XE300 vs Klipsch Groove/Heritage Groove
- Sony SRS-XE300 vs Yamaha True X Speaker 1A
- Sony SRS-XE300 vs Ultimate Ears Boom 3
- Sony SRS-XE300 vs Ultimate Ears Wonderboom
- Sony SRS-XE300 vs Ultimate Ears Wonderboom 2
- See all 73 comparisons