Short answer: the JBL PartyBox On-The-Go 2 Plus. It ranks #5 of 91 boombox speakers by sound quality, rated 4.4/5, at $349.95; the Sony ULT Field 7 ranks #56, rated 3.2/5, and costs $400, so there is little reason to consider the other one.
The JBL PartyBox On-The-Go 2 Plus is the better-sounding choice. Well balanced with strong vocals, and its front-firing bass ports give it cleaner, smoother bass than other PartyBoxes, so even the Punchy bass boost setting never overpowers the vocals. The catch: The bass has less kick and physical impact than the Encore 2 or PartyBox Club 120, and the Club 120 gets noticeably louder.
The Sony ULT Field 7 is the longer-running, tougher pick. It is rated for 30 hours of battery against 15 for the JBL PartyBox On-The-Go 2 Plus. It is rated IP67 against IPX4 for the JBL PartyBox On-The-Go 2 Plus. It supports LDAC Bluetooth, which the JBL PartyBox On-The-Go 2 Plus lacks. The tradeoff: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the JBL PartyBox On-The-Go 2 Plus. It is rated higher for sound quality than the Sony ULT Field 7 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| JBL PartyBox On-The-Go 2 Plus | Sony ULT Field 7 | |
|---|---|---|
| Price | $349.95 | $400 |
| Ranked | #5 of 91 in Boombox Size Portable Bluetooth Speakers | #56 of 91 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (JBL One app) | No |
| Aux Input | Yes | Yes |
| Battery Life | 15 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Built-in Microphone | No | Yes |
| EQ | Yes (app EQ, Deep and Punchy bass boost) | Yes (App + ULT button) |
| IP Rating | IPX4 | IP67 |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 11V/2A) | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord | AC Power cord |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 14.2 lbs (6.45 kg) | 13.9 lbs (6.3 kg) |
| Wireless Microphones | Yes 1 Included | - |
| Microphone Input | No (wireless only) | Yes (Karaoke mode with echo effect) |
| Guitar Input | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, LC3 | SBC, AAC, LDAC |
| Bluetooth Version | 5.4 | 5.2 |
| Amplifier Power | 100W RMS | 100W |
| Dimensions | 19.7” x 10.2” x 8.7” (501 x 258 x 221 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 1x 135mm (5.25”) woofer + 2x 20mm (0.75”) dome tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Frequency Response | 40Hz - 20kHz (-6dB, Manufacturer specified) | - |
| Digital Aux Input | Yes (USB-C) | No |
| Lights | Yes | - |
| Strap | Yes (detachable shoulder strap) | No |
| Bass Extension (-10dB) | - | ~52Hz |
Related Speaker Comparisons
More worthwhile head-to-heads for JBL PartyBox On-The-Go 2 Plus:
- Tribit Stormbox Blast vs JBL PartyBox On-The-Go 2 Plus
- JBL Partybox Encore 2 vs JBL PartyBox On-The-Go 2 Plus
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore Essential 2
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore Essential
Prices on this page were last checked October 4, 2026 at 9:58 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.
The Two Speakers In Full
JBL PartyBox On-The-Go 2 Plus: $349.95 Amazon eBay
Older model: the JBL Partybox On the Go (ranked lower, rated 3/5).
Pros: Well balanced with strong vocals, and its front-firing bass ports give it cleaner, smoother bass than other PartyBoxes, so even the Punchy bass boost setting never overpowers the vocals. It gets a touch louder than the PartyBox Encore 2. EasySing AI vocal removal strips vocals from any song on the speaker itself, with 25%, 50% or 100% removal, and the included rechargeable wireless mic has a tight pickup pattern that rejects handling noise. A removable 34Wh battery shared with the Encore 2 and PartyBox 120, a claimed 15 hours, a padded shoulder strap, USB-C playback and charging, a 3.5mm aux input, Auracast and a light show.
Cons: The bass has less kick and physical impact than the Encore 2 or PartyBox Club 120, and the Club 120 gets noticeably louder. There is no wired microphone or guitar input, so more mics means buying JBL’s EasySing mics separately, and AI vocal removal is disabled while the speaker is linked to other speakers over Auracast. Real world battery life is closer to 7 hours at 80% volume with lights and bass boost on. IPX4 only covers splashes, the grille dents easily, and the battery must be installed for it to run even when plugged in.
Full JBL PartyBox On-The-Go 2 Plus review and specifications →
| Amplifier Power | 100W RMS |
|---|---|
| App | Yes (JBL One app) |
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, LC3 |
| Bluetooth Version | 5.4 |
| Built-in Microphone | No |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 19.7” x 10.2” x 8.7” (501 x 258 x 221 mm) |
| Drivers | 1x 135mm (5.25”) woofer + 2x 20mm (0.75”) dome tweeters |
| EQ | Yes (app EQ, Deep and Punchy bass boost) |
| Frequency Response | 40Hz - 20kHz (-6dB, Manufacturer specified) |
| Guitar Input | No |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | No (wireless only) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C, 11V/2A) |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Partially |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 14.2 lbs (6.45 kg) |
| Wireless Microphones | Yes 1 Included |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore 2
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore Essential 2
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore
- JBL PartyBox On-The-Go 2 Plus vs JBL Partybox Encore Essential
- JBL PartyBox On-The-Go 2 Plus vs Tribit Stormbox Blast
- JBL PartyBox On-The-Go 2 Plus vs Aiwa Exos-9
- JBL PartyBox On-The-Go 2 Plus vs Yeahbox Sonic Boom Ultra
- JBL PartyBox On-The-Go 2 Plus vs Harman Kardon Onyx Studio 8
- See all 58 comparisons
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
Smaller model: the Sony ULT Field 1 (rated 3.1/5).
Larger model: the Sony ULT Tower 10 (rated 3.9/5).
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
- 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 Sony SRS-XG500
- Sony ULT Field 7 vs Gemini GRV-650L
- See all 85 comparisons