Short answer: the Onn Pro X Large Boom Boombox. It ranks #49 of 113 boombox speakers by sound quality, rated 3.4/5, at $199; the Sony ULT Field 7 ranks #61, rated 3.2/5, and costs $448, which makes this an easy call rather than a real tradeoff.
What the Onn Pro X Large Boom Boombox does well: A powerful, waterproof party boombox with a 20 hour battery and light modes at a low price. The catch: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.
The Sony ULT Field 7 is the longer-running option. A waterproof stereo party speaker with a 30 hour battery and karaoke mic and guitar inputs. It is rated for 30 hours of battery against 20 for the Onn Pro X Large Boom Boombox. Watch for: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the Onn Pro X Large Boom Boombox. It is rated higher for sound quality than the Sony ULT Field 7 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.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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 Pro X Large Boom Boombox | Sony ULT Field 7 | |
|---|---|---|
| Price | $199.00 | $448.00 |
| Ranked | #49 of 113 in Boombox Size Portable Bluetooth Speakers | #61 of 113 in Boombox Size Portable Bluetooth Speakers |
| Battery Life | 20 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Amplifier Power | 180W RMS (540W peak) | 100W |
| Weight | 17.2 lbs (7.8 kg) | 13.9 lbs (6.3 kg) |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 5 speakers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | No | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Aux Input | Yes | Yes |
| Power Bank | Yes (USB-A, 5V/2A) | Yes (USB-A, 5V/1.5A) |
| TWS | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.4 (Manufacturer specified) | 5.2 |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Omnidirectional | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC, AAC, LDAC |
| Lights | Yes | - |
| Digital Aux Input | No | No |
| EQ | Yes (Bass Boost) | Yes (App + ULT button) |
| Bass Extension (-10dB) | - | ~52Hz |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Stereo | - | Yes |
| USB Playback | - | Yes |
| App | - | No |
| Built-in Microphone | - | Yes |
| Strap | - | No |
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