Short answer: the ULT Field 1, and it costs less too. It ranks #99 of 179 medium speakers at $138; the Megaboom 4 ranks #173 at $200, $62 more for a spot near the bottom of the class.
Our own cons entry for the Megaboom 4 doesn’t hedge. A lot of distortion at higher volumes, rolled-off treble, not very loud, and the blunt verdict: they really screwed this up. It does finally add USB-C charging and a ‘PartyUp’ multi-speaker sync feature.
The ULT Field 1’s complaints are narrower. An upper midrange peak and rolled-off treble, alongside real-world battery life our notes measure around 28-plus hours with the ULT bass boost mode off, and the ability to stereo-pair with a second unit.
Buy the ULT Field 1. The Megaboom 4 is one of the clearest cases on the site of a name-brand speaker simply not delivering.
There is a real battery-life gap here: the Ultimate Ears Megaboom 4 is rated for 20 hours, the Sony ULT Field 1 only 12 hours.
Want more options? Browse the full Portable Bluetooth rankings.
A tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing.
A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking.
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
| Sony ULT Field 1 | Ultimate Ears Megaboom 4 | |
|---|---|---|
| Price | $138.00 | $200 |
| Ranked | #99 of 179 in Medium Size Portable Bluetooth Speakers | #173 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| EQ | Yes | Yes (via app) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (PartyUp up to 50 speakers) |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 2.4 lbs (1.1 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Bluetooth Version | 5.3 | 5.1 |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | Yes (built-in loop) |
| Maximum SPL | - | 91dB (Manufacturer specified) |
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