Short answer: the Yeahbox Sonic Boom Max 3. It ranks #40 of 75 boombox speakers by sound quality at $228.99; the Sony ULT Field 7 ranks #42 and costs $400, so there is not much of a tradeoff to weigh.
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 Yeahbox Sonic Boom Max 3 offers: A large 3-way, 5-driver party speaker with claimed 200W RMS output, a 111Wh battery, USB-C fast charging, app EQ, TWS pairing, and aux, USB and microSD playback. Listener comparisons describe powerful bass, strong output and decent mids and highs for outdoor party use. Watch for: There is limited independent testing and the water/dust rating is reported inconsistently across listings. Listener comparisons find it less clear and refined than stronger boombox rivals, so its big bass and output are a better fit for parties than critical listening.
Buy the Yeahbox Sonic Boom Max 3. It ranks higher for sound quality than the Sony ULT Field 7 and costs less, which settles it without a real tradeoff to make.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony ULT Field 7 | Yeahbox Sonic Boom Max 3 | |
|---|---|---|
| Price | $400 | $228.99 |
| Ranked | #42 of 75 in Boombox Size Portable Bluetooth Speakers | #40 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 111Wh (14.8V/7,500mAh) (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) | - |
| Power Bank | Yes (USB-A, 5V/1.5A) | - |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| USB Playback | Yes | Yes |
| Weight | 13.9 lbs (6.3 kg) | 16.8 lbs (7.64 kg) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| App | No | Yes |
| EQ | Yes (App + ULT button) | Yes |
| TWS | Yes | Yes |
| Built-in Microphone | Yes | - |
| Bluetooth Version | 5.2 | 5.3 |
| Dimensions | 20.2" x 8.8" x 8.7" (512 x 224 x 222 mm) | 20.7" x 8.3" x 10.6" (525 x 210 x 268 mm) |
| Amplifier Power | 100W | 200W RMS / 300W Peak |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
| Lights | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Yeahbox Sonic Boom Max 3:
- Tribit Stormbox Blast vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore 2 vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore Essential 2 vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore Essential vs Yeahbox Sonic Boom Max 3
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.
As an eBay Partner, we may be compensated if you make a purchase.
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 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
- Sony ULT Field 7 vs Sony SRS-XG500
- Sony ULT Field 7 vs W-King T11
- Sony ULT Field 7 vs JBL Boombox
- See all 58 comparisons
Yeahbox Sonic Boom Max 3: $228.99 Amazon eBay
Pros: A large 3-way, 5-driver party speaker with claimed 200W RMS output, a 111Wh battery, USB-C fast charging, app EQ, TWS pairing, and aux, USB and microSD playback. Listener comparisons describe powerful bass, strong output and decent mids and highs for outdoor party use.
Cons: There is limited independent testing and the water/dust rating is reported inconsistently across listings. Listener comparisons find it less clear and refined than stronger boombox rivals, so its big bass and output are a better fit for parties than critical listening.
Full Yeahbox Sonic Boom Max 3 review and specifications →
| Amplifier Power | 200W RMS / 300W Peak |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 111Wh (14.8V/7,500mAh) (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 20.7" x 8.3" x 10.6" (525 x 210 x 268 mm) |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters |
| EQ | Yes |
| IP Rating | IPX6 |
| Lights | Yes |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.8 lbs (7.64 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Yeahbox Sonic Boom Max 3 vs Skullcandy Barrel
- Yeahbox Sonic Boom Max 3 vs Bugani Boost Max
- Yeahbox Sonic Boom Max 3 vs Soundcore Rave Party 2
- Yeahbox Sonic Boom Max 3 vs Tronsmart Bang Max
- Yeahbox Sonic Boom Max 3 vs Onn Medium Party Speaker Gen 2
- Yeahbox Sonic Boom Max 3 vs JBL Partybox On the Go
- Yeahbox Sonic Boom Max 3 vs B&O Beolit 20
- Yeahbox Sonic Boom Max 3 vs JBL Authentics 300
- See all 52 comparisons