Short answer: the JBL Partybox On the Go for the bundled mic, the Sony ULT Field 7 for sound. The Sony is described as better sounding than the XG500, with the caveat that its bass is still not as deep as the top ranked speakers. The JBL includes a wireless microphone but has a poor water rating.
Buy the Sony ULT Field 7. It is rated higher for sound quality, and the $100 saving on the JBL Partybox On the Go is not enough to make up the difference.
If battery life is a priority, the Sony ULT Field 7 is rated for 30 hours versus 6 hours for the JBL Partybox On the Go.
Water resistance is not close: the Sony ULT Field 7 is rated at IP67 (brief submersion), well ahead of the JBL Partybox On the Go at IPX4 (splashing).
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 7 | JBL Partybox On the Go | |
|---|---|---|
| Price | $400 | $300 |
| Ranked | #56 of 90 in Boombox Size Portable Bluetooth Speakers | #60 of 90 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~52Hz | 49Hz |
| Battery Life | 30 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| Guitar Input | Yes | - |
| IP Rating | IP67 | IPX4 |
| 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, 5V/2.1A) |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| USB Playback | Yes | Yes |
| Weight | 13.9 lbs (6.3 kg) | 16.5 lbs (7.5 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| App | No | Yes (JBL PartyBox app) |
| EQ | Yes (App + ULT button) | No |
| TWS | Yes | Yes |
| Built-in Microphone | Yes | No |
| Bluetooth Version | 5.2 | 4.2 |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) | 19.3” x 8.8” x 9.6” (489 x 224 x 244.5 mm) |
| Amplifier Power | 100W | 100W |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters | 5.1” woofer + tweeters |
| Digital Aux Input | No | No |
| Strap | No | Yes (detachable shoulder strap) |
| Maximum SPL | - | 94dB (Manufacturer specified) |
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Prices on this page were last checked October 2, 2026 at 10:18 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
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, 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 | Yes |
| 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
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- 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 Sony SRS-XG500
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- Sony ULT Field 7 vs JBL Boombox
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JBL Partybox On the Go: $300 Amazon eBay
Newer model: the JBL PartyBox On-The-Go 2 Plus, ranked higher, rated 4.4/5.
Pros: JBL Partybox On the Go uses 5.1” woofer + tweeters. Its 7.5 kg, claimed 6 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 94dB and limited-stereo playback make it a practical option for its intended room or portable use. A wireless microphone is included. Measured bass extension of 49Hz (-10dB).
Cons: Bass is limited by its 49Hz specification. No EQ adjustment. Battery life is short, and its sound trails the rest of the Partybox line.
Full JBL Partybox On the Go review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | Yes (JBL PartyBox app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 49Hz |
| Battery Life | 6 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.3” x 8.8” x 9.6” (489 x 224 x 244.5 mm) |
| Drivers | 5.1” woofer + tweeters |
| EQ | No |
| IP Rating | IPX4 |
| Maximum SPL | 94dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | USB-C |
| Stereo | Partially |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.5 lbs (7.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Partybox On the Go vs Sony SRS-XG500
- JBL Partybox On the Go vs Onn Medium Party Speaker Gen 2
- JBL Partybox On the Go vs JBL Boombox
- JBL Partybox On the Go vs Soundcore Rave Party 2
- JBL Partybox On the Go vs Soundcore Motion Boom+
- JBL Partybox On the Go vs Skullcandy Barrel
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- JBL Partybox On the Go vs Yeahbox Sonic Boom Max 3
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