Short answer: the Harman Kardon Onyx Studio 7. It ranks #12 of 73 boombox speakers by sound quality at $298.90; the Sony ULT Field 7 ranks #40 and costs $400, which makes this an easy call rather than a real tradeoff.
What the Harman Kardon Onyx Studio 7 offers: Warm sound with boosted bass. Watch for: Sounds a little sterile. 8 hour battery at medium volume, teeny bit less bass than the Onyx 6. Not at loud as others. No water rating.
What the Sony ULT Field 7 offers: Better sounding than the XG500 Watch for: Still not as deep bass as the top ranked speakers. 8khz peak
Buy the Harman Kardon Onyx Studio 7. It ranks higher for sound quality than the Sony ULT Field 7 and costs less, which settles it without a real tradeoff to make.
Battery life favors the Sony ULT Field 7: rated for 30 hours against 8 hours for the Harman Kardon Onyx Studio 7.
If water resistance matters to you, the Sony ULT Field 7 at IP67 (brief submersion) holds up far better than the Harman Kardon Onyx Studio 7 at no water resistance.
Specifications Side By Side
| Harman Kardon Onyx Studio 7 | Sony ULT Field 7 | |
|---|---|---|
| Price | $298.90 | $400 |
| Ranked | #12 of 73 in Boombox Size Portable Bluetooth Speakers | #40 of 73 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 37Hz | ~52Hz |
| Battery Life | 8 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Built in Microphone | Yes | Yes |
| IP Rating | None | IP67 |
| Bluetooth Latency | 266ms | - |
| Max Volume | 96dB | - |
| Party Mode | Yes (Wireless Dual Sound) | Yes (Party Connect up to 100 speakers) |
| Power Input | DC Barrel Connector (19V/2.1A) | AC Power cord |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 6.4 lbs / 2.9 kg | 13.9 lbs / 6.3 kg |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| App | No | No |
| EQ | No | Yes (App + ULT button) |
| Power Bank | No | Yes (USB-A, 5V/1.5A) |
| USB Playback | No | Yes |
| Output Power | 50W RMS | 100W |
| Dimensions | 11.3" x 11.3" (285.8 x 285.8 mm) (round design) | 20.2" x 8.8" x 8.7" (512 x 224 x 222 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters |
| Digital Aux Input | No | No |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Bluetooth Version | - | 5.2 |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- JBL Boombox 4 vs Skullcandy Barrel
- Harman Kardon Onyx Studio 5 vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs JBL Boombox 2
- Turtlebox Gen 2 vs Harman Kardon Onyx Studio 7
- Harman Kardon Onyx Studio 7 vs JBL Boombox
Prices on this page were last checked August 27, 2026 at 10:09 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
Harman Kardon Onyx Studio 7: $298.90 Amazon eBay
Pros: Warm sound with boosted bass.
Cons: Sounds a little sterile. 8 hour battery at medium volume, teeny bit less bass than the Onyx 6. Not at loud as others. No water rating.
Full Harman Kardon Onyx Studio 7 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 37Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 266ms |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.3" x 11.3" (285.8 x 285.8 mm) (round design) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters |
| EQ | No |
| IP Rating | None |
| Max Volume | 96dB |
| Omnidirectional | No |
| Output Power | 50W RMS |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Partially (1 woofer) |
| TWS | No |
| USB Playback | No |
| Weight | 6.4 lbs / 2.9 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Boombox 2 vs Onyx Studio 7 big bass battle 💋 More from alanrossreviews →
- Alan Ross Reviews: Onyx Studio 7 vs Onyx Studio 6 - massive deep bass battle 😁
- Geri’s Collection: Harman Kardon Onyx 7 vs Onyx 4
- KULAS TECH SHOW: Harman / Kardon Onyx Studio 5 vs Onyx Studio 7 - Close battle🔥🔥 More from KULASTECHSHOW20 →
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
- Reddit Search for Harman Kardon Onyx Studio 7 Review
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 6
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 7 vs Harman Kardon Onyx Studio 8
- Harman Kardon Onyx Studio 7 vs Zealot ZE41
- Harman Kardon Onyx Studio 7 vs Zealot ZE21
- Harman Kardon Onyx Studio 7 vs Zealot S89
- Harman Kardon Onyx Studio 7 vs JBL Partybox Encore Essential
- Harman Kardon Onyx Studio 7 vs JBL Boombox 4
- See all 44 comparisons
Sony ULT Field 7: $400 Amazon eBay
Pros: Better sounding than the XG500
Cons: Still not as deep bass as the top ranked speakers. 8khz peak
Full Sony ULT Field 7 review and specifications →
| 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 |
| Output Power | 100W |
| 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
- Jay’s Straight Up Reviews & More: SONY ULT Field 7 💣vs JBL Boombox 3 🧨 Showdown! 🪇Let’s Shake it Up! 🔋Battery Powered Basement Battle More from JaysStraightUpReviews →
- Dominik Reviews: Sony ULT Field 7 vs Tribit Stormbox Blast Both good? 😂 More from Dominik Reviews →
- Reddit Search for Sony ULT Field 7 Review
- 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 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
- Sony ULT Field 7 vs Soundcore Motion Boom+
- See all 48 comparisons