Short answer: the Tronsmart Bang Max. It ranks #52 of 112 boombox speakers by sound quality, rated 3.4/5, at $229.99; the Sony ULT Field 7 ranks #61, rated 3.2/5, and costs $448, so there is little reason to consider the other one.
The case for the Sony ULT Field 7: A waterproof stereo party speaker with a 30 hour battery and karaoke mic and guitar inputs. It supports LDAC Bluetooth, which the Tronsmart Bang Max lacks. It links with other speakers (Party Connect up to 100 speakers), which the Tronsmart Bang Max cannot. The catch: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
The Tronsmart Bang Max is the deeper-bass option. A loud, feature packed party speaker with big bass, app EQ, lights, and separate mic and guitar inputs. Its bass reaches about 39Hz before falling 10dB, against 52Hz for the Sony ULT Field 7. Watch for: Its bass-first tuning prioritizes impact over accuracy: upper mids and lower treble can sound unnatural, while fine midrange and treble detail are limited.
Buy the Tronsmart Bang Max. It is rated higher for sound quality than the Sony ULT Field 7 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
A waterproof stereo party speaker with a 30 hour battery and karaoke mic and guitar inputs.
A loud, feature packed party speaker with big bass, app EQ, lights, and separate mic and guitar inputs.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Sony ULT Field 7 | Tronsmart Bang Max | |
|---|---|---|
| Price | $448.00 | $229.99 |
| Ranked | #61 of 112 in Boombox Size Portable Bluetooth Speakers | #52 of 112 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | 39Hz |
| Battery Life | 30 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Guitar Input | Yes | - |
| IP Rating | IP67 | IPX6 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-A, 5V/1.5A) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| USB Playback | Yes | No |
| Weight | 13.9 lbs (6.3 kg) | 12.8 lbs (5.8 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| App | No | Yes |
| EQ | Yes (App + ULT button) | Yes (multiple modes) |
| TWS | Yes | Yes |
| Built-in Microphone | Yes | No |
| Bluetooth Version | 5.2 | 5.3 |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) | 18.5” x 7.8” x 10.2” (470 x 199 x 260 mm) |
| Amplifier Power | 100W | 130W |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters | 2x ~165mm (6.5”) woofers + 2x ~63mm (2.5”) mid drivers + 2x ~25mm (1”) tweeters |
| Digital Aux Input | No | No |
| Strap | No | - |
| Aux Latency | - | 16ms |
| Bluetooth Latency | - | 160ms |
| Maximum SPL | - | 111dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
| Lights | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Tronsmart Bang Max: