These sit in different size classes, so this is not a straight ranking comparison. The Sony ULT Tower 7 ranks #1 of 53 party speakers by sound quality at $648; the Sony ULT Field 7 ranks #61 of 113 boombox speakers by sound quality at $448.
The case for the Sony ULT Tower 7: A big, loud party speaker on wheels with punchy bass, a 30 hour battery, 360 degree sound and inputs for mics and instruments. Watch for: The reviewer notes that Auracast pairing is not backward-compatible with Sony’s older Party Connect speakers, and the hard-plastic corners lack protective rubber bumpers.
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 much less than the Sony ULT Tower 7 at 50.3 lbs (22.8 kg). It is rated IP67 against IPX4 for the Sony ULT Tower 7. The catch: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the Sony ULT Tower 7 at $648 for a party speaker, or the Sony ULT Field 7 at $448 for a boombox speaker instead.
Looking for alternatives? See the complete 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 Tower 7 | Sony ULT Field 7 | |
|---|---|---|
| Price | $648.00 | $448.00 |
| Ranked | #1 of 53 in Party Size Portable Bluetooth Speakers | #61 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Sony Sound Connect) | No |
| Aux Input | RCA input | Yes |
| Battery Life | 30 hours (lights off; manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 | 5.2 |
| Built-in Microphone | No | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| Dimensions | 13.7” x 16.6” x 28” (348 x 422 x 711 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 7 drivers: 1x woofer, 2x midrange, 2x front tweeter, 2x rear tweeter | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat) | Yes (App + ULT button) |
| Guitar Input | No | Yes |
| IP Rating | IPX4 | IP67 |
| Microphone Input | Yes | Yes (Karaoke mode with echo effect) |
| Omnidirectional | Yes (360 degree Party Sound) | No |
| Amplifier Power | 420W | 100W |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB charging) | Yes (USB-A, 5V/1.5A) |
| Power Input | AC power cord | AC Power cord |
| Removable Battery | No | - |
| Stereo | Yes | Yes |
| TWS | Yes (Stereo Pair) | Yes |
| USB Playback | Yes (USB-A) | Yes |
| Weight | 50.3 lbs (22.8 kg) | 13.9 lbs (6.3 kg) |
| Wi-Fi | No | - |
| Lights | Yes | - |
| Wheels | Yes | - |
| Strap | No | No |
| Bass Extension (-10dB) | - | ~52Hz |
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