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 $400 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 $400 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.
Specifications Side By Side
| Ultimate Ears Megaboom 4 | Sony ULT Field 7 | |
|---|---|---|
| Price | $200 | $400 |
| Ranked | #140 of 145 in Medium Size Portable Bluetooth Speakers | #52 of 85 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 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 |
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Prices on this page were last checked September 26, 2026 at 11:14 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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The Two Speakers In Full
Ultimate Ears Megaboom 4: $200 Amazon eBay
Older model: the Ultimate Ears Megaboom 3 (ranked higher, rated 3/5).
Pros: IP67 rated, floats, and finally uses USB-C charging. 20 hour battery life. ‘PartyUp’ feature syncs multiple UE speakers together.
Cons: A lot of distortion at higher volumes. Rolled off treble. Not very loud. They really screwed this up
Full Ultimate Ears Megaboom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 91dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
- Links
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Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).
Cons: Bass is limited by its ~52Hz specification. There is no companion app. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Full Sony ULT Field 7 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (App + ULT button) |
| Guitar Input | Yes |
| IP Rating | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 7 vs Skullcandy Barrel
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