Short answer: the Soundcore Boom 2, if you are buying new. The Soundcore Motion Boom ranks higher than the Onn Portable FM Boombox (#14 vs #26 of 115 large speakers) but is discontinued; its replacement, the Soundcore Boom 2, is rated 4.5/5 at $99.99 and is still sold new.
The Soundcore Motion Boom is the longer-running, lighter option. A great value waterproof boombox that floats, with loud, bass rich sound, a long battery and a phone charging port. It is rated for 24 hours of battery against 16 for the Onn Portable FM Boombox. At 3.3 lbs (1.5 kg) it weighs noticeably less than the Onn Portable FM Boombox at 4.9 lbs (2.22 kg). It has an adjustable EQ, which the Onn Portable FM Boombox lacks. The tradeoff: Not as neutral or detailed as other top ranked speakers.
Why pick the Onn Portable FM Boombox: An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery. It keeps a wired aux input, which the Soundcore Motion Boom lacks. It links with other speakers (Party Sync, pairs with 1 other onn. speaker), which the Soundcore Motion Boom cannot. The catch: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size.
Buy the Soundcore Boom 2, the replacement for the discontinued Soundcore Motion Boom; it is rated higher for sound quality than the Onn Portable FM Boombox.
Want more options? Browse the full Portable Bluetooth rankings.
A great value waterproof boombox that floats, with loud, bass rich sound, a long battery and a phone charging port.
An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery.
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
| Soundcore Motion Boom | Onn Portable FM Boombox | |
|---|---|---|
| Price | $109.99 Discontinued | $74.83 |
| Ranked | #14 of 115 in Large Size Portable Bluetooth Speakers | #26 of 115 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 53Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IPX7 | IPX7 |
| Bluetooth Latency | 170ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | Yes (Party Sync, pairs with 1 other onn. speaker) |
| Power Bank | Yes (USB-A) | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 3.3 lbs (1.5 kg) | 4.9 lbs (2.22 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes | Yes |
| Bluetooth Version | 5.0 | - |
| Dimensions | 13.6” x 7.9” x 5.8” (346 x 200 x 148 mm) | 13.8” x 5.9” x 7.7” (350 x 149 x 195 mm) |
| Drivers | 2x 63.5mm titanium fullrange drivers + 2x passive radiators | 2 speakers |
| Amplifier Power | 30W | 25W RMS (100W peak) |
| Digital Aux Input | No | No |
| FM Tuner | - | Yes (10 presets) |
| Removable Battery | - | No |
| Lights | - | Yes |
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