Short answer: the Teufel Rockster Cross. It ranks #23 of 115 large speakers by sound quality, rated 4.2/5, at $199.99; the Ultimate Ears Epicboom ranks #84, rated 2.9/5, and costs $228.59, so there is not much of a tradeoff to weigh.
The Teufel Rockster Cross is the better-sounding pick. A splash resistant speaker with fairly neutral, vocal focused sound and punchy, controlled bass that suits rock and jazz. It supports aptX Bluetooth, which the Ultimate Ears Epicboom lacks. The catch: Outdoor mode can sound somewhat harsh due to the 4kHz peak.
The Ultimate Ears Epicboom is the tougher choice. A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging. It is rated IPX7 against IPX5 for the Teufel Rockster Cross. Watch for: Not very deep bass for the size.
Buy the Teufel Rockster Cross. It is rated higher for sound quality than the Ultimate Ears Epicboom and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
A splash resistant speaker with fairly neutral, vocal focused sound and punchy, controlled bass that suits rock and jazz.
A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging.
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Specifications Side By Side
| Teufel Rockster Cross | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $199.99 | $228.59 |
| Ranked | #23 of 115 in Large Size Portable Bluetooth Speakers | #84 of 115 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 51Hz | ~55Hz |
| Battery Life | 16 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| IP Rating | IPX5 | IPX7 |
| Power Input | DC barrel jack | USB-C |
| TWS | Yes | Yes |
| Weight | 5.3 lbs (2.4 kg) | 4.3 lbs (1.97 kg) |
| App | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, aptX | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | No |
| Power Bank | Yes (USB-A) | No |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 15” x 6.3” x 5.1” (380 x 160 x 130 mm) | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Drivers | 5” woofer, 2x textile dome tweeters + 2x passive radiators | 1x 120mm woofer, 2x 45mm tweeters |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 30W | 10W RMS |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (built-in loop) |
| Maximum SPL | - | 94dB (Manufacturer specified) |
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