Short answer: the Onn Portable FM Boombox. It ranks #26 of 115 large speakers by sound quality, rated 4.2/5, at $74.83; the Ultimate Ears Epicboom ranks #84, rated 2.9/5, and costs $228.59, so there is little reason to consider the other one.
The Onn Portable FM Boombox is the better-sounding pick. An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery. It links with other speakers (Party Sync, pairs with 1 other onn. speaker), which the Ultimate Ears Epicboom cannot. The catch: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size.
What the Ultimate Ears Epicboom does well: A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging. Watch for: Not very deep bass for the size.
Buy the Onn Portable FM Boombox. It is rated higher for sound quality than the Ultimate Ears Epicboom and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Portable Bluetooth rankings.
An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery.
A rugged, floating waterproof speaker made mostly from recycled materials, with long Bluetooth range and USB-C charging.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Onn Portable FM Boombox | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $74.83 | $228.59 |
| Ranked | #26 of 115 in Large Size Portable Bluetooth Speakers | #84 of 115 in Large Size Portable Bluetooth Speakers |
| Battery Life | 16 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| IP Rating | IPX7 | IPX7 |
| Amplifier Power | 25W RMS (100W peak) | 10W RMS |
| FM Tuner | Yes (10 presets) | - |
| Built-in Microphone | Yes | Yes |
| Power Bank | Yes (USB-A) | No |
| Power Input | USB-C | USB-C |
| Weight | 4.9 lbs (2.22 kg) | 4.3 lbs (1.97 kg) |
| Dimensions | 13.8” x 5.9” x 7.7” (350 x 149 x 195 mm) | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Drivers | 2 speakers | 1x 120mm woofer, 2x 45mm tweeters |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Sync, pairs with 1 other onn. speaker) | No |
| App | No | No |
| EQ | No | No |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| Removable Battery | No | - |
| Omnidirectional | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Stereo | Yes | Yes |
| Bass Extension (-10dB) | - | ~55Hz |
| Bluetooth Version | - | 5.2 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Maximum SPL | - | 94dB (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
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