Short answer: the Tronsmart Bang Max. It ranks #36 of 75 boombox speakers by sound quality at $229.99; the Sony ULT Field 7 ranks #42 and costs $400, so there is little reason to consider the other one.
What the Sony ULT Field 7 offers: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its ~52Hz specification. There is no companion app.
What the Tronsmart Bang Max offers: A powerful, feature-rich party speaker with loud, bass-rich output, app EQ, power-bank capability, lighting, TWS/multi-speaker linking, and separate microphone and guitar inputs with independent level control. Reviews find it can fill a large room even at moderate volume, while SoundPulse or custom EQ gives it useful flexibility for parties and casual karaoke. 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. Deep Bass mode can swallow the rest of the mix, volume control is imprecise and some reviewers hear distortion above roughly 98dB. It is a party tool, not a neutral monitor.
Buy the Tronsmart Bang Max. It ranks higher for sound quality than the Sony ULT Field 7 and costs less, which settles it without a real tradeoff to make.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 7 | Tronsmart Bang Max | |
|---|---|---|
| Price | $400 | $229.99 |
| Ranked | #42 of 75 in Boombox Size Portable Bluetooth Speakers | #36 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | 39Hz |
| Battery Life | 30 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 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 | - |
| 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 |
| Aux Latency | - | 16ms |
| Bluetooth Latency | - | 160ms |
| Maximum SPL | - | 111dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
| Lights | - | Yes |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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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The Two Speakers In Full
Sony ULT Field 7: $400 Amazon eBay
Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).
Cons: Bass is limited by its ~52Hz specification. There is no companion app.
Full Sony ULT Field 7 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20.2" x 8.8" x 8.7" (512 x 224 x 222 mm) |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters |
| EQ | Yes (App + ULT button) |
| Guitar Input | Yes |
| IP Rating | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 7 vs Skullcandy Barrel
- Sony ULT Field 7 vs Soundcore Rave Party 2
- Sony ULT Field 7 vs Yeahbox Sonic Boom Max 3
- Sony ULT Field 7 vs Teufel Boomster NG (2017)
- Sony ULT Field 7 vs Onn Medium Party Speaker Gen 2
- Sony ULT Field 7 vs JBL Partybox On the Go
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Tronsmart Bang Max: $229.99 Tronsmart eBay
Pros: A powerful, feature-rich party speaker with loud, bass-rich output, app EQ, power-bank capability, lighting, TWS/multi-speaker linking, and separate microphone and guitar inputs with independent level control. Reviews find it can fill a large room even at moderate volume, while SoundPulse or custom EQ gives it useful flexibility for parties and casual karaoke. Measured bass extension of 39Hz (-10dB).
Cons: Its bass-first tuning prioritizes impact over accuracy: upper mids and lower treble can sound unnatural, while fine midrange and treble detail are limited. Deep Bass mode can swallow the rest of the mix, volume control is imprecise and some reviewers hear distortion above roughly 98dB. It is a party tool, not a neutral monitor.
Full Tronsmart Bang Max review and specifications →
| Amplifier Power | 130W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 16ms |
| Bass Extension (-10dB) | 39Hz |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 160ms |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 18.5" x 7.8" x 10.2" (470 x 199 x 260 mm) |
| Drivers | 2x ~165mm (6.5") woofers + 2x ~63mm (2.5") mid drivers + 2x ~25mm (1") tweeters |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| Lights | Yes |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 12.8 lbs (5.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Tronsmart Bang Max Review, JBL Boombox 3 wannabe 130w More from alanrossreviews →
- Techder Audios: Zealot ZE01 VS Tronsmart Bang Max SOLID VOCALS VS DEEPER BASS More from techderaudios →
- Jay’s Straight Up Reviews & More: Triple Threat Match 🔺 SkullCandy Barrel XT, Tribit Blast & Tronsmart Bang Max 📛 Bluetooth Boombox 🔋 More from JaysStraightUpReviews →
- Head-to-Head Comparisons
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