Short answer: the Teufel Rockster Go 2. It ranks #91 of 164 medium speakers by sound quality, rated 3.2/5, at $129.99; the Ultimate Ears Boom 3 ranks #111, rated 2.9/5, and costs $134.99, so there is not much of a tradeoff to weigh.
The Teufel Rockster Go 2 is the better-sounding pick. At 1.6 lbs (0.74 kg), the IP67 Rockster Go 2 is genuinely easy to carry, and its claimed 28-hour battery life, USB-C fast charging, stereo pairing, and tripod mount suit outdoor use. It supports AAC Bluetooth, which the Ultimate Ears Boom 3 lacks. It charges over USB-C rather than Micro USB. The tradeoff: There is no companion app or 3.5 mm input.
Why pick the Ultimate Ears Boom 3: 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. The catch: Not stereo, barely any bass, recessed treble.
Buy the Teufel Rockster Go 2. It is rated higher for sound quality than the Ultimate Ears Boom 3 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Teufel Rockster Go 2 | Ultimate Ears Boom 3 | |
|---|---|---|
| Price | $129.99 | $134.99 |
| Ranked | #91 of 164 in Medium Size Portable Bluetooth Speakers | #111 of 164 in Medium Size Portable Bluetooth Speakers |
| Aux Input | No | No |
| Battery Life | 15 hours, 28 with Eco Mode (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Weight | 1.6 lbs (735 g) | 1.3 lbs (608 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC | SBC |
| Dimensions | 8.3” x 4.3” x 2.4” (211 x 109 x 61 mm) | 7.2” x 2.9” (184 x 73 mm) |
| Drivers | 2x 50mm wide-band drivers + 1x 64mm passive radiator | 2x 2” active drivers + 2x 2” x 4” passive radiators |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Link, up to 100 speakers) | Yes (PartyUp up to 50 speakers) |
| Built-in Microphone | No | No |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| Digital Aux Input | Yes (USB-C sound card) | No |
| App | Yes (Teufel Go) | Yes (Ultimate Ears BOOM & MEGABOOM app) |
| EQ | Yes | Yes (via app) |
| Power Input | USB-C | Micro USB |
| Power Bank | No | - |
| USB Playback | No | - |
| Amplifier Power | 8W | - |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Charging Time | 2.5 hours (Manufacturer specified) | - |
| Strap | Yes (detachable strap) | Yes (built-in loop) |
| Bass Extension (-10dB) | - | 91Hz |
| Bluetooth Version | - | 4.2 |
| Maximum SPL | - | 87dB (Manufacturer specified) |
Related Speaker Comparisons
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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
Teufel Rockster Go 2: $129.99 Amazon eBay
Older model: the Teufel Rockster Go (ranked lower, rated 2.6/5).
Pros: At 0.74 kg, the IP67 Rockster Go 2 is genuinely easy to carry, and its claimed 28-hour battery life, USB-C fast charging, stereo pairing, and tripod mount suit outdoor use. Independent listening found a balanced, clear midrange and tuneful bass at sensible levels.
Cons: There is no companion app or 3.5 mm input. Reviewers found it loses some definition at maximum volume, and the claimed battery figure is optimistic for loud outdoor playback.
Full Teufel Rockster Go 2 review and specifications →
| Amplifier Power | 8W |
|---|---|
| App | Yes (Teufel Go) |
| Aux Input | No |
| Battery Life | 15 hours, 28 with Eco Mode (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Built-in Microphone | No |
| Charging Time | 2.5 hours (Manufacturer specified) |
| Digital Aux Input | Yes (USB-C sound card) |
| Dimensions | 8.3” x 4.3” x 2.4” (211 x 109 x 61 mm) |
| Drivers | 2x 50mm wide-band drivers + 1x 64mm passive radiator |
| EQ | Yes |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Link, up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| USB Playback | No |
| Weight | 1.6 lbs (735 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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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.
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