These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox 330 ranks #2 of 53 party speakers by sound quality at $629.95; the Sony ULT Field 7 ranks #61 of 113 boombox speakers by sound quality at $448.
What the JBL Partybox 330 does well: A rolling party speaker with deep bass, a removable battery, a light show and inputs for mics and a guitar. Watch for: It remains very large and heavy, and the sound improvement over the JBL Partybox Stage 320 is modest rather than transformational.
The Sony ULT Field 7 is the longer-running, lighter option. A waterproof stereo party speaker with a 30 hour battery and karaoke mic and guitar inputs. It is rated for 30 hours of battery against 18 for the JBL Partybox 330. At 13.9 lbs (6.3 kg) it weighs much less than the JBL Partybox 330 at 37.7 lbs (17.1 kg). It is rated IP67 against IPX4 for the JBL Partybox 330. The catch: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the JBL Partybox 330 at $629.95 for a party speaker, or the Sony ULT Field 7 at $448 for a boombox 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
| JBL Partybox 330 | Sony ULT Field 7 | |
|---|---|---|
| Price | $629.95 | $448.00 |
| Ranked | #2 of 53 in Party Size Portable Bluetooth Speakers | #61 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 6.0 | 5.2 |
| Charging Time | 3 hours | - |
| Drivers | 2x 6.5” (165mm) woofers + 2x 1” (25mm) PEN dome tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (Smart EQ mode) | Yes (App + ULT button) |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (Karaoke mode with echo effect) |
| Inputs | Optical | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1A) | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 37.7 lbs (17.1 kg) | 13.9 lbs (6.3 kg) |
| Amplifier Power | 280W | 100W |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Wheels | Yes | - |
| Dimensions | 26.1”H x 13.1”W x 14.8”D (662.5 x 334 x 375 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Strap | No | No |
| Bass Extension (-10dB) | - | ~52Hz |
| Built-in Microphone | - | Yes |
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