Short answer: the onn Pro X Large Boom Boombox. It ranks #35 of 76 boombox speakers by sound quality, rated 3.4/5, at $199; the Sony ULT Field 7 ranks #43, rated 3.2/5, and costs $400, which makes this an easy call rather than a real tradeoff.
What the onn Pro X Large Boom Boombox does well: High rated power for the price at 180W RMS (540W peak). The catch: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.
The case for the Sony ULT Field 7: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Watch for: Bass is limited by its ~52Hz specification.
Buy the onn Pro X Large Boom Boombox. 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.
There is a real battery-life gap here: the Sony ULT Field 7 is rated for 30 hours, the onn Pro X Large Boom Boombox only 20 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| onn Pro X Large Boom Boombox | Sony ULT Field 7 | |
|---|---|---|
| Price | $199.00 | $400 |
| Ranked | #35 of 76 in Boombox Size Portable Bluetooth Speakers | #43 of 76 in Boombox Size Portable Bluetooth Speakers |
| Battery Life | 20 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Amplifier Power | 180W RMS (540W peak) | 100W |
| Weight | 17.2 lbs (7.8 kg) | 13.9 lbs (6.3 kg) |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 5 speakers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | No | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Aux Input | Yes | Yes |
| Power Bank | Yes (USB-A, 5V/2A) | Yes (USB-A, 5V/1.5A) |
| TWS | Yes | Yes |
| Discontinued | No | - |
| Bluetooth Version | 5.4 (Manufacturer specified) | 5.2 |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Omnidirectional | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC, AAC, LDAC |
| Lights | Yes | - |
| Digital Aux Input | No | No |
| EQ | Yes (Bass Boost) | Yes (App + ULT button) |
| Bass Extension (-10dB) | - | ~52Hz |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Stereo | - | Yes |
| USB Playback | - | Yes |
| App | - | No |
| Built-in Microphone | - | Yes |
| Strap | - | No |
Related Speaker Comparisons
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Prices on this page were last checked September 26, 2026 at 11:14 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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The Two Speakers In Full
onn Pro X Large Boom Boombox: $199.00 Walmart eBay
Pros: High rated power for the price at 180W RMS (540W peak). IP67 waterproof design for indoor and outdoor use. 20 hour battery life. 6 LED lighting modes. Party Mode supports multiple devices.
Cons: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast. Frequency response isn’t as smooth as the top ranked speakers. Charges via AC cable rather than USB-C. Only available in the United States and Canada.
Full onn Pro X Large Boom Boombox review and specifications →
| Amplifier Power | 180W RMS (540W peak) |
|---|---|
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 (Manufacturer specified) |
| Digital Aux Input | No |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Discontinued | No |
| Drivers | 5 speakers |
| EQ | Yes (Bass Boost) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| TWS | Yes |
| Weight | 17.2 lbs (7.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- onn Pro X Large Boom Boombox vs Teufel Boomster 2021
- onn Pro X Large Boom Boombox vs JBL Authentics 300
- onn Pro X Large Boom Boombox vs W-King X20
- onn Pro X Large Boom Boombox vs Soundcore Boom 2 Plus
- onn Pro X Large Boom Boombox vs Zealot S95
- onn Pro X Large Boom Boombox vs LG Xboom Stage 301
- onn Pro X Large Boom Boombox vs Tribit Stormbox Blast 2
- onn Pro X Large Boom Boombox vs Sony SRS-XG500
- See all 15 comparisons
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (rated 3/5).
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. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
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 |
| Strap | No |
| 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
- Sony ULT Field 7 vs Gemini GRV-650L
- Sony ULT Field 7 vs Sony SRS-XG500
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