Short answer: the Ultimate Ears Megaboom 4 for value, the Sony ULT Field 7 for sound. The ULT Field 7 sounds better than Sony’s own XG500, but it is still not as deep in the bass as the top-ranked speakers and has a peak around 8kHz, at $448 against $200. The Megaboom 4 is IP67 rated, floats, charges by USB-C, runs 20 hours and syncs with PartyUp, but it distorts a lot at higher volumes, rolls off the treble and is not very loud.
Buy the Ultimate Ears Megaboom 4 at $200 if you want a medium speaker. Buy the Sony ULT Field 7 at $448 if you want a boombox speaker instead.
If battery life is a priority, the Sony ULT Field 7 is rated for 30 hours versus 20 hours for the Ultimate Ears Megaboom 4.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Ultimate Ears Megaboom 4 | Sony ULT Field 7 | |
|---|---|---|
| Price | $200 | $448.00 |
| Ranked | #173 of 179 in Medium Size Portable Bluetooth Speakers | #61 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 20 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (PartyUp up to 50 speakers) | Yes (Party Connect up to 100 speakers) |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.2 |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| TWS | Yes | Yes |
| EQ | Yes (via app) | Yes (App + ULT button) |
| Power Input | USB-C | AC Power cord |
| Built-in Microphone | No | Yes |
| Weight | 2.4 lbs (1.1 kg) | 13.9 lbs (6.3 kg) |
| Maximum SPL | 91dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Aux Input | No | Yes |
| Strap | Yes (built-in loop) | No |
| Bass Extension (-10dB) | - | ~52Hz |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Power Bank | - | Yes (USB-A, 5V/1.5A) |
| USB Playback | - | Yes |
| Amplifier Power | - | 100W |
Related Speaker Comparisons
More worthwhile head-to-heads for Sony ULT Field 7: