Short answer: the Ultimate Ears Wonderboom on price and water protection, though neither ranks well in its class. It is IP67 rated and floats and costs $50 less, though it is not stereo, has barely any bass and recessed treble. The Sony SRS-XB20 is IPX5 rated with a pill shape that slides easily into a bag, but it sounds thin at higher volumes. Both are rated below 3.0/5 among the 164 medium speakers, and the Earfun Uboom L, ranked #2 at $49.79, is a better place to start if sound quality matters.
Buy the Ultimate Ears Wonderboom only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, start with the Earfun Uboom L instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony SRS-XB20 | Ultimate Ears Wonderboom | |
|---|---|---|
| Price | $129 Discontinued | $79 Discontinued |
| Ranked | #117 of 164 in Medium Size Portable Bluetooth Speakers | #109 of 164 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Party Mode | Yes (Partychain up to 100 speakers) | No |
| Weight | 1.3 lbs (590 g) | 0.9 lbs (425 g) |
| IP Rating | IPX5 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | - |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Dimensions | 7.8” x 2.7” x 2.7” (198 x 68 x 69 mm) | 4” x 3.7” (102 x 93.5 mm) |
| TWS | Yes | Yes |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| App | Yes (SongPal) | No |
| EQ | No | No |
| Built-in Microphone | Yes | No |
| Power Input | Micro USB | Micro USB |
| Power Bank | No | - |
| Amplifier Power | 20W | - |
| Drivers | 2x 42mm full-range drivers + 2x passive radiators | 2x 1.6” active drivers + 2x 1.8” x 2.6” passive radiators |
| Digital Aux Input | No | No |
| Strap | - | Yes (built-in loop) |
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Prices on this page were last checked October 4, 2026 at 9:58 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
Sony SRS-XB20: $129 Discontinued eBay
Newer model: the Sony ULT Field 1, ranked higher, rated 3.1/5.
Pros: Sony SRS-XB20 uses 2x 42mm full-range drivers + 2x passive radiators. Its 590 g, claimed 12 hours (Manufacturer specified) battery life, IPX5 protection, aux input and stereo playback make it a practical option for its intended room or portable use.
Cons: No EQ adjustment. Sounds thin at higher volumes. Discontinued.
Full Sony SRS-XB20 review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | Yes (SongPal) |
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.8” x 2.7” x 2.7” (198 x 68 x 69 mm) |
| Drivers | 2x 42mm full-range drivers + 2x passive radiators |
| EQ | No |
| IP Rating | IPX5 |
| Omnidirectional | No |
| Party Mode | Yes (Partychain up to 100 speakers) |
| Power Bank | No |
| Power Input | Micro USB |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.3 lbs (590 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony SRS-XB20 vs Yamaha True X Speaker 1A
- Sony SRS-XB20 vs Tribit Stormbox
- Sony SRS-XB20 vs Sony SRS-XE300
- Sony SRS-XB20 vs Bose SoundLink Color II
- Sony SRS-XB20 vs Klipsch Groove
- Sony SRS-XB20 vs Marshall Emberton III
- Sony SRS-XB20 vs Ultimate Ears Boom 3
- Sony SRS-XB20 vs Marshall Emberton II
- See all 73 comparisons
Ultimate Ears Wonderboom: $79 Discontinued eBay
Newer model: the Ultimate Ears Wonderboom 4, ranked higher, rated 2.9/5.
Pros: IP67 rated and floats. Compact, light, and simple to use.
Cons: Not stereo, barely any bass, recessed treble. Dip at 9kHz. Low mid bass distortion. Not technically a 360 speaker, only front and rear. Discontinued.
Full Ultimate Ears Wonderboom review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 10 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4” x 3.7” (102 x 93.5 mm) |
| Drivers | 2x 1.6” active drivers + 2x 1.8” x 2.6” passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Input | Micro USB |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (425 g) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
- Ultimate Ears Wonderboom vs Ultimate Ears Wonderboom 2
- Ultimate Ears Wonderboom vs Ultimate Ears Boom 4
- Ultimate Ears Wonderboom vs Ultimate Ears Wonderboom 3
- Ultimate Ears Wonderboom vs Ultimate Ears Boom 3
- Ultimate Ears Wonderboom vs Klipsch Groove
- Ultimate Ears Wonderboom vs Ultimate Ears Wonderboom 4
- Ultimate Ears Wonderboom vs Ultimate Ears Megaboom 3
- Ultimate Ears Wonderboom vs LG Xboom Grab
- See all 74 comparisons