Short answer: the Turtlebox Cub. It ranks #77 of 102 large speakers by sound quality, rated 3.0/5, at $330. The Ultimate Ears Epicboom ranks #81, rated 2.9/5, at $213.41, $116.59 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Turtlebox Cub: A compact, cube-shaped Turtlebox at 5.3 lbs (2.4 kg) with a real two-way layout: a 4.5 inch woofer and a 1.3 inch titanium tweeter. It links with other speakers (Party Mode), which the Ultimate Ears Epicboom cannot. The catch: The evidence so far is listening impressions from two reviews, with no side by side tests against other brands.
Why pick the Ultimate Ears Epicboom: 17 hour battery with USB-C charging (first UE portable with USB-C). It plays in stereo from a single unit, unlike the Turtlebox Cub. Watch for: Not very deep bass for the size.
Buy the Turtlebox Cub. It is rated higher for sound quality, and the $116.59 saving on the Ultimate Ears Epicboom is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Turtlebox Cub | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $330.00 | $213.41 |
| Ranked | #77 of 102 in Large Size Portable Bluetooth Speakers | #81 of 102 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 4.5” (114mm) woofer + 1x 1.3” (33mm) titanium tweeter | 1x 120mm woofer, 2x 45mm tweeters |
| Battery Life | 14+ hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX7 |
| Weight | 5.3 lbs (2.4 kg) | 4.3 lbs (1.97 kg) |
| Dimensions | 8.6”H x 7.2”W x 5.7”D (218 x 183 x 146 mm) | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Party Mode | Yes (Party Mode) | No |
| TWS | Yes | Yes |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Strap | No | Yes (built-in loop) |
| Bluetooth | Yes | Yes |
| Bass Extension (-10dB) | - | ~55Hz |
| App | - | No |
| Aux Input | - | Yes |
| Bluetooth Codecs | - | SBC |
| Built-in Microphone | - | Yes |
| EQ | - | No |
| Bluetooth Version | - | 5.2 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 10W RMS |
| Maximum SPL | - | 94dB (Manufacturer specified) |
| Digital Aux Input | - | No |
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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
Turtlebox Cub: $330.00 Amazon eBay
Pros: A compact, cube-shaped Turtlebox at 2.4 kg with a real two-way layout: a 4.5 inch woofer and a 1.3 inch titanium tweeter. Reviewers found it very loud for its size, with warm, bass-forward tuning and a bit more bass than the Turtlebox Ranger. IP67 waterproof and dustproof, crush and drop resistant, stainless steel tie-downs, a claimed 14+ hours from a 49.95Wh battery, USB-C charging with a power bank output, stereo pairing and Party Mode.
Cons: The evidence so far is listening impressions from two reviews, with no side by side tests against other brands. One reviewer found it loses bass at high volume, and it is not as loud as the full-size Turtlebox. Turtlebox’s claimed 118dB is a figure the brand’s larger speakers have not come close to at a standard one meter distance. It is also mono from one unit, and its recessed USB-C port only fits slim cable plugs.
Full Turtlebox Cub review and specifications →
| Battery Life | 14+ hours (Manufacturer specified) |
|---|---|
| Bluetooth | Yes |
| Dimensions | 8.6”H x 7.2”W x 5.7”D (218 x 183 x 146 mm) |
| Drivers | 1x 4.5” (114mm) woofer + 1x 1.3” (33mm) titanium tweeter |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Mode) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ultimate Ears Epicboom: $213.41 Amazon eBay
Pros: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Made mostly from recycled fabric and plastic. Large best-sounding UE portable that still feels portable. 180ft Bluetooth range. Measured bass extension of ~55Hz (-10dB).
Cons: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
Full Ultimate Ears Epicboom review and specifications →
| Amplifier Power | 10W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Drivers | 1x 120mm woofer, 2x 45mm tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 94dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 4.3 lbs (1.97 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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