These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox Stage 320 ranks #3 of 53 party speakers by sound quality at $569.95; the Sony ULT Field 7 ranks #61 of 113 boombox speakers by sound quality at $448.
The case for the JBL Partybox Stage 320: An excellent sounding party speaker, with deep bass that holds up at high volume, wheels, a removable battery and mic inputs. The catch: Slightly sibilant in the treble at full blast.
The Sony ULT Field 7 is the longer-running, lighter choice. 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 Stage 320. At 13.9 lbs (6.3 kg) it weighs much less than the JBL Partybox Stage 320 at 36.4 lbs (16.5 kg). It is rated IP67 against IPX4 for the JBL Partybox Stage 320. Watch for: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the JBL Partybox Stage 320 at $569.95 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 Stage 320 | Sony ULT Field 7 | |
|---|---|---|
| Price | $569.95 | $448.00 |
| Ranked | #3 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 | 5.4 | 5.2 |
| Drivers | 2x 6.5” woofers, 2x 25mm tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (5 band) | 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) |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) | 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 | 36.4 lbs (16.5 kg) | 13.9 lbs (6.3 kg) |
| Amplifier Power | 240W | 100W |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Wheels | Yes | - |
| Dimensions | 26.3”H x 13.2”W x 15.2”D (669 x 335 x 385 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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