Short answer: the Teufel Rockster Go 2. It ranks #93 of 179 medium speakers by sound quality, rated 3.2/5, at $99.99. The Ultimate Ears Wonderboom 4 ranks #109, rated 2.9/5, at $64.99, $35 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Teufel Rockster Go 2 is the better-sounding pick. A light, rugged waterproof speaker with very long battery life in eco mode, stereo pairing and a tripod mount. It supports AAC Bluetooth, which the Ultimate Ears Wonderboom 4 lacks. It links with other speakers (Party Link, up to 100 speakers), which the Ultimate Ears Wonderboom 4 cannot. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. Watch for: There is no companion app or 3.5 mm input.
The Ultimate Ears Wonderboom 4 is the lighter pick. A small, tough waterproof speaker with a strap loop and USB-C charging, easy to clip on a bag for outdoor trips. At 0.9 lbs (420 g) it weighs much less than the Teufel Rockster Go 2 at 1.6 lbs (735 g). The tradeoff: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
Buy the Teufel Rockster Go 2. It is rated higher for sound quality, and the $35 saving on the Ultimate Ears Wonderboom 4 is not enough to make up the difference.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Teufel Rockster Go 2 | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | $99.99 | $64.99 |
| Ranked | #93 of 179 in Medium Size Portable Bluetooth Speakers | #109 of 179 in Medium Size Portable Bluetooth Speakers |
| Aux Input | No | No |
| Battery Life | 15 hours, 28 with Eco Mode (Manufacturer specified) | 14 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Weight | 1.6 lbs (735 g) | 0.9 lbs (420 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC | SBC |
| Dimensions | 8.3” x 4.3” x 2.4” (211 x 109 x 61 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 50mm wide-band drivers + 1x 64mm passive radiator | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Link, up to 100 speakers) | No |
| Built-in Microphone | No | No |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| Digital Aux Input | Yes (USB-C sound card) | No |
| App | Yes (Teufel Go) | No |
| EQ | Yes | No |
| Power Input | USB-C | USB-C |
| Power Bank | No | 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) |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Bluetooth Version | - | 5.2 |
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