Short answer: the Ultimate Ears Boom 3, unless you need stereo, though neither ranks well in its class. It is IP67 rated, floats and has a rugged fabric shell, with rich warm bass, crisp highs, a 15-hour battery and PartyUp pairing for up to 150 speakers. The catch is that it is not stereo and our notes call its bass barely there with recessed treble, while the Teufel Rockster Go at least brings a wide Dynamore soundstage. Both are rated below 3.0/5 among the 164 medium speakers; for better sound, the Earfun Uboom L ranks #2 at $49.79.
Buy the Ultimate Ears Boom 3. It is rated higher for sound quality; the Teufel Rockster Go is no longer sold new.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Teufel Rockster Go | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | €83.00 Discontinued | $134.99 |
| Ranked | #126 of 164 in Medium Size Portable Bluetooth Speakers | #111 of 164 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IPX7 | IP67 |
| Weight | 1.5 lbs (700 g) | 1.3 lbs (608 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.0 | 4.2 |
| Bluetooth Codecs | aptX, SBC | SBC |
| Dimensions | 8.3” x 3.9” x 3.9” (210 x 100 x 100 mm) | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 2x 45mm full-range drivers + 1x passive radiator | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Link, 2 devices) | Yes (PartyUp up to 50 speakers) |
| Built-in Microphone | Yes | No |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| Digital Aux Input | No | No |
| App | No | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| EQ | No | Yes (via app) |
| Power Input | Micro USB | Micro USB |
| Bass Extension (-10dB) | - | 91Hz |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
How Ultimate Ears Boom 3 compares with other leading options:
- Earfun Uboom L vs Ultimate Ears Boom 3
- Soundcore Motion 300 vs Ultimate Ears Boom 3
- Soundcore Motion+ vs Ultimate Ears Boom 3
- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Boom 3
- Minirig 4 vs Ultimate Ears Boom 3
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
Teufel Rockster Go: €83.00 Discontinued eBay
Newer model: the Teufel Rockster Go 2, ranked higher, rated 3.2/5.
Pros: Clear mid-range with bright treble, wide soundstage via Dynamore processing, IP67 waterproof and durable, solid battery life, compact design with carrying strap
Cons: Rolled off treble, muffled sound, mids sound strange. Bass not very deep. Only available in Europe. Discontinued.
Full Teufel Rockster Go review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 4.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.9” x 3.9” (210 x 100 x 100 mm) |
| Drivers | 2x 45mm full-range drivers + 1x passive radiator |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Party Link, 2 devices) |
| Power Input | Micro USB |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.5 lbs (700 g) |
- Links
- 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
- Teufel Rockster Go vs Sony SRS-XB30
- Teufel Rockster Go vs Soundcore Flare 2
- Teufel Rockster Go vs Marshall Emberton II
- Teufel Rockster Go vs Marshall Emberton III
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- Teufel Rockster Go vs Tribit Stormbox Mini+
- See all 20 comparisons
Ultimate Ears Boom 3: $134.99 Amazon eBay
Newer model: the Ultimate Ears Boom 4, ranked higher, rated 2.9/5.
Pros: Rich and warm bass without muddying mix, crisp highs, excellent 15-hour battery life, stable Bluetooth connectivity, IP67 rated and floats, rugged fabric shell, can pair up to 150 speakers via PartyUp. Measured bass extension of 91Hz (-10dB).
Cons: Not stereo, barely any bass, recessed treble. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2021. Lots of mentions of failing batteries on amazon. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Boom 3 review and specifications →
| App | Yes (Ultimate Ears BOOM & MEGABOOM app) |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 91Hz |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.3 lbs (608 g) |
- Links
- 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 Boom 3 vs Ultimate Ears Boom 4
- Ultimate Ears Boom 3 vs Klipsch Groove
- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom
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- Ultimate Ears Boom 3 vs Ultimate Ears Wonderboom 4
- See all 99 comparisons