Short answer: the Sony ULT Field 7, if you are buying new. The JBL Boombox 2 ranks higher than it (#40 vs #56 of 90 boombox speakers, 3.5/5 vs 3.2/5) but is discontinued, so only consider it used; the Sony ULT Field 7 is still sold new at $400.
The case for the Sony ULT Field 7: Better sounding than the XG500. The tradeoff: Still not as deep bass as the top ranked speakers.
Buy the Sony ULT Field 7 if you want one new; the JBL Boombox 2 is discontinued, so only look for it used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Boombox 2 | Sony ULT Field 7 | |
|---|---|---|
| Price | $449.99 Discontinued | $400 |
| Ranked | #40 of 90 in Boombox Size Portable Bluetooth Speakers | #56 of 90 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 33ms | - |
| Bass Extension (-10dB) | 46Hz | ~52Hz |
| Battery Life | 24 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IPX7 | IP67 |
| Bluetooth Latency | 140ms | - |
| Maximum SPL | 108dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A) | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power brick | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 13 lbs (5.9 kg) | 13.9 lbs (6.3 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| App | No | No |
| EQ | No | Yes (App + ULT button) |
| TWS | Yes | Yes |
| USB Playback | No | Yes |
| Built-in Microphone | No | Yes |
| FM Tuner | No | - |
| Microphone Input | No | Yes (Karaoke mode with echo effect) |
| MicroSD Playback | No | - |
| Amplifier Power | 160W | 100W |
| Dimensions | 19.1” x 7.9” x 10.1” (485 x 201 x 257 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 81mm woofers + 2x 20mm tweeters with passive radiators | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.1 | 5.2 |
| Strap | No | No |
| Guitar Input | - | Yes |
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- JBL Partybox Encore 2 vs JBL Boombox 2
- JBL Partybox Encore Essential 2 vs JBL Boombox 2
- JBL Partybox Encore vs JBL Boombox 2
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
JBL Boombox 2: $449.99 Discontinued Amazon eBay
Newer model: the JBL Boombox 4, ranked higher, rated 4/5.
Pros: 24 hour battery life (default volume); 20+ hours even at 60% volume. IPX7 rated. Doubles as a power bank. Bluetooth 5.1 with PartyBoost (up to 100 speakers). Reaches 101dB. Measured bass extension of 46Hz (-10dB).
Cons: Somewhat bass heavy and boomy. Discontinued.
Full JBL Boombox 2 review and specifications →
| Amplifier Power | 160W |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 33ms |
| Bass Extension (-10dB) | 46Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 140ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.1” x 7.9” x 10.1” (485 x 201 x 257 mm) |
| Drivers | 2x 81mm woofers + 2x 20mm tweeters with passive radiators |
| EQ | No |
| FM Tuner | No |
| IP Rating | IPX7 |
| Maximum SPL | 108dB (measured by Alan Ross Reviews) |
| MicroSD Playback | No |
| Microphone Input | No |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power brick |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 13 lbs (5.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Boombox 3 review vs JBL Boombox 2 a subwoofer and a 3 way equals heaven? 💋 More from alanrossreviews →
- Alan Ross Reviews: JBL Boombox 2 vs Onyx Studio 7 big bass battle 💋
- Alan Ross Reviews: Tribit Stormbox Blast vs JBL Boombox 2 big bass boombox speakers 💕
- Alan Ross Reviews: JBL Boombox 2 bass monster or the mature Harman Kardon Go+ Play 2 mini for bass?? 💥
- Mateusz Cholewa: 2 x 🔊Teufel Boomster 2021🎵 vs JBL Boombox 2 AC🔌 Power Test Audio🎧. More from Mateusz Cholewa →
- GYMCADDY: Soundboks Go Vs JBL Boombox 2 Vs UE Hyperboom Vs Sony XG500 More from GYMCADDY →
- Head-to-Head Comparisons
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 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
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- See all 76 comparisons