Short answer: the Ultimate Ears Wonderboom 4, though neither ranks well in its class. It ranks #106 of 164 medium speakers by sound quality (rated 2.9/5) at $78.95 and is still sold new; the Teufel Rockster Go ranks #126 (rated 2.6/5) and is discontinued, so it is only an option used. 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 Wonderboom 4. It is rated higher for sound quality and still sold new, while the Teufel Rockster Go is discontinued.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Teufel Rockster Go | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | €83.00 Discontinued | $78.95 |
| Ranked | #126 of 164 in Medium Size Portable Bluetooth Speakers | #106 of 164 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| IP Rating | IPX7 | IP67 |
| Weight | 1.5 lbs (700 g) | 0.9 lbs (420 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.0 | 5.2 |
| Bluetooth Codecs | aptX, SBC | SBC |
| Dimensions | 8.3” x 3.9” x 3.9” (210 x 100 x 100 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 45mm full-range drivers + 1x passive radiator | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Link, 2 devices) | No |
| Built-in Microphone | Yes | No |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| Digital Aux Input | No | No |
| App | No | No |
| EQ | No | No |
| Power Input | Micro USB | USB-C |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Power Bank | - | No |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
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- Ultimate Ears Wonderboom 4 vs Soundcore Motion+
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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: €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
- Teufel Rockster Go vs TDK A33
- Teufel Rockster Go vs Bose SoundLink Color II
- Teufel Rockster Go vs B&O Beosound Explore
- Teufel Rockster Go vs Tribit Stormbox Mini+
- See all 20 comparisons
Ultimate Ears Wonderboom 4: $78.95 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Megaboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Wonderboom 4 vs LG Xboom Grab
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Wonderboom 4 vs Soundcore 2
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Boom 4
- Ultimate Ears Wonderboom 4 vs Tribit Stormbox 2
- See all 138 comparisons