Short answer: the Ultimate Ears Boom 4. It ranks #88 of 136 medium speakers by sound quality; the Teufel Rockster Go ranks #103.
On the Teufel Rockster Go side: Clear mid-range with bright treble, wide soundstage via Dynamore processing, IP67 waterproof and durable, solid battery life, compact design with carrying strap. Watch for: Rolled off treble, muffled sound, mids sound strange.
What the Ultimate Ears Boom 4 gets right: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. The tradeoff: Not much improvement over the old ones.
One note: the Teufel Rockster Go is discontinued, but it still ranks #103 of 136 medium speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the Teufel Rockster Go if the price matters more than sound quality. Buy the Ultimate Ears Boom 4 if sound quality matters more than the price.
If sound quality matters at all to you, skip the Teufel Rockster Go. It ranks near the bottom of the 136 medium speakers, so look higher up the list instead.
Specifications Side By Side
| Teufel Rockster Go | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | €83.00 Discontinued | $105 |
| Ranked | #103 of 136 in Medium Size Portable Bluetooth Speakers | #88 of 136 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 | 1.4 lbs / 620 g |
| Bluetooth Version | 4.0 | 5.1 |
| Bluetooth Codecs | aptX, SBC | - |
| Dimensions | 8.3" x 3.9" x 3.9" (210 x 100 x 100 mm) | 7.2" x 2.9" x 2.9" (184 x 73 x 73 mm) |
| Drivers | 2x 45mm full-range drivers + 1x passive radiator | 2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Link, 2 devices) | - |
| Built in Microphone | Yes | No |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Discontinued | Yes | - |
| Digital Aux Input | No | No |
| App | - | Yes |
| Power Input | - | USB-C |
| EQ | - | Yes (via app) |
| Power Bank | - | No |
| Max Volume | - | 85dBC |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Ultimate Ears Boom 3 vs Soundcore Motion X500
- Marshall Emberton III vs Ultimate Ears Wonderboom
- Sony SRS-XB20 vs Ultimate Ears Wonderboom
- Ultimate Ears Boom 3 vs Ultimate Ears Boom 4
- Teufel Rockster Go vs Ultimate Ears Boom 3
The Two Speakers In Full
Teufel Rockster Go: €83.00 Discontinued
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 →
| Aux Input | Yes |
|---|---|
| Battery Life | 12 hours (Manufacturer specified) |
| 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) |
| Discontinued | Yes |
| Drivers | 2x 45mm full-range drivers + 1x passive radiator |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Party Link, 2 devices) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.5 lbs / 700 g |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- 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 17 comparisons
Ultimate Ears Boom 4: $105 Amazon
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 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 |
| Max Volume | 85dBC |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.4 lbs / 620 g |
As an eBay Partner, we may be compensated if you make a purchase.
- 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 Ultimate Ears Wonderboom 4
- Ultimate Ears Boom 4 vs Sony SRS-XE300
- Ultimate Ears Boom 4 vs Tribit Stormbox
- See all 23 comparisons