Short answer: the Onn Portable FM Boombox. It ranks #26 of 120 large speakers by sound quality, rated 4.2/5, at $74.83; the Soundcore Motion X500 ranks #27, rated 4.1/5, and costs $99.99, which makes this an easy call rather than a real tradeoff.
The Onn Portable FM Boombox is the longer-running choice. An excellent value waterproof boombox that floats, with reasonably deep bass, FM radio, lights and a long battery. It is rated for 16 hours of battery against 12 for the Soundcore Motion X500. It links with other speakers (Party Sync, pairs with 1 other onn. speaker), which the Soundcore Motion X500 cannot. The tradeoff: Reasonable frequency response, but not quite as smooth as some of the top-ranked speakers in this size.
Why pick the Soundcore Motion X500: A compact, waterproof stereo speaker with good sound and solid build for the money. It has an adjustable EQ, which the Onn Portable FM Boombox lacks. Watch for: A little bright on top, a custom EQ can flatten things out a bit.
Buy the Onn Portable FM Boombox. It is rated higher for sound quality than the Soundcore Motion X500 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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 | Soundcore Motion X500 | |
|---|---|---|
| Price | $74.83 | $99.99 |
| Ranked | #26 of 120 in Large Size Portable Bluetooth Speakers | #27 of 120 in Large Size Portable Bluetooth Speakers |
| Battery Life | 16 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| IP Rating | IPX7 | IPX7 |
| Amplifier Power | 25W RMS (100W peak) | 40W |
| 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) | 4.6 lbs (2.1 kg) |
| Dimensions | 13.8” x 5.9” x 7.7” (350 x 149 x 195 mm) | 8.7” x 8” x 3.2” (220 x 202 x 81 mm) |
| Drivers | 2 speakers | 2x 58mm (2.3”) forward-firing full-range drivers + 1x 43mm (1.7”) upward-firing driver |
| TWS | Yes | Yes |
| Party Mode | Yes (Party Sync, pairs with 1 other onn. speaker) | No |
| App | No | Yes |
| EQ | No | Yes |
| 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) | LDAC, SBC |
| Lights | Yes | - |
| Stereo | Yes | Yes |
| Bass Extension (-10dB) | - | 48Hz |
| Maximum SPL | - | 104dB (measured by Alan Ross Reviews) |
| Bluetooth Version | - | 5.3 |
| Frequency Response | - | 50Hz - 40kHz (Manufacturer specified) |
| Strap | - | No |
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