These are not really the same size class, and that is the honest framing here. The Sony ULT Field 7 ranks #61 of 113 boombox speakers by sound quality at $448; the Soundboks Mix ranks #36 of 53 party speakers by sound quality at $799.
The Sony ULT Field 7 is the lighter, tougher option. A waterproof stereo party speaker with a 30 hour battery and karaoke mic and guitar inputs. At 13.9 lbs (6.3 kg) it weighs noticeably less than the Soundboks Mix at 21.4 lbs (9.7 kg). It is rated IP67 against IP65 for the Soundboks Mix. It has an adjustable EQ, which the Soundboks Mix lacks. Watch for: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
The Soundboks Mix is the longer-running option. A rugged, weatherproof party speaker with a swappable battery that runs all day at mid volume and fast USB-C charging. It is rated for 40 hours of battery against 30 for the Sony ULT Field 7. Watch for: Doesn’t have as deep of bass as higher-ranked speakers, and can sound somewhat bright in the treble.
Buy the Sony ULT Field 7 at $448 if you want a boombox speaker. Buy the Soundboks Mix at $799 if you want a party speaker instead.
Want more options? Browse the full 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
| Sony ULT Field 7 | Soundboks Mix | |
|---|---|---|
| Price | $448.00 | $799 |
| Ranked | #61 of 113 in Boombox Size Portable Bluetooth Speakers | #36 of 53 in Party Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Guitar Input | Yes | - |
| IP Rating | IP67 | IP65 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (TeamUp, up to 5 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) | No |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| USB Playback | Yes | No |
| Weight | 13.9 lbs (6.3 kg) | 21.4 lbs (9.7 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (additional codecs unverified) |
| App | No | No |
| EQ | Yes (App + ULT button) | No |
| TWS | Yes | No |
| Built-in Microphone | Yes | - |
| Bluetooth Version | 5.2 | 4.2 |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) | 19.1” x 13.5” x 10.9” (484 x 342 x 276 mm) |
| Amplifier Power | 100W | 72W |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters | 10” woofer, 1.2” tweeter |
| Digital Aux Input | No | No |
| Strap | No | - |
| Frequency Response | - | 40Hz - 20kHz (Manufacturer specified) |
| Maximum SPL | - | 121dB (Manufacturer specified) |
| Removable Battery | - | Yes |
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