Short answer: it’s close, and comes down to features versus weight. These rank #41 and #28 out of 75 portable speakers, separated by only 13 places, with the ULT Field 5 at $198 against the Boom 2 Plus’s $179.99.
Both speakers prioritize bass and loudness over tonal precision. The ULT Field 5’s cons state it prioritizes bass and loudness over fidelity, with subdued upper mids and highs and limited stereo separation, and note its deep bass is less authoritative than the enclosure suggests. The Boom 2 Plus’s cons describe a warm tuning with rolled off treble and some upper bass boost, with bass that’s reasonably deep but not as good as the top ranked speakers.
The ULT Field 5 has more onboard features. Its pros list LDAC and AAC codec support, a 10-band app EQ plus a dedicated ULT bass button with two modes, Party Connect, aux input, and USB-C power-bank output, all backed by a claimed 25 hour battery. The Boom 2 Plus’s main advantage by comparison is being noticeably lighter than most boombox-size speakers, which matters if you’re moving it around often.
Buy the ULT Field 5 for the richer feature set: LDAC, app EQ, aux input, and power-bank charging out.
Buy the Boom 2 Plus if you want a lighter boombox-style speaker and don’t need Sony’s extra codec and connectivity features.
Specifications Side By Side
| Sony ULT Field 5 | Soundcore Boom 2 Plus | |
|---|---|---|
| Price | $198 | $179.99 |
| Ranked | #41 of 77 in Large Size Portable Bluetooth Speakers | #28 of 75 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Life | 25 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC, AAC |
| Bluetooth Version | 5.3 | - |
| Built in Microphone | Yes | Yes |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) | 17.3" x 9.1" x 5.9" (440 x 230 x 150 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 2x 114mm (4.5") woofers + 2x 19mm (0.75") tweeters |
| EQ | Yes (App + ULT button) | Yes (Pro EQ + presets) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (PartyCast 2.0) |
| Power Bank | Yes (USB-C) | Yes (USB-C, 5V/2A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs / 3.3 kg | 8.4 lbs / 3.8 kg |
| Output Power | 27W | 140W |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 39Hz |
| Max Volume | - | 111dB |
| MicroSD Playback | - | No |
| USB Playback | - | No |
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Prices on this page were last checked September 8, 2026 at 6:02 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 5: $198 Amazon eBay
Pros: A tough 3.3kg portable with IP67 protection, LDAC/AAC support, aux input, a 10-band app EQ, Party Connect, USB-C power-bank output and a claimed 25-hour battery. Reviews find it energetic and dynamic with substantial bass, enough volume for a yard, and two ULT modes that let bass-focused listeners choose a deeper or punchier presentation.
Cons: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth. Deep bass is less authoritative than the enclosure suggests, and the loud confirmation tone when pressing the ULT button is an unnecessary annoyance. Use the app EQ and audition it before buying for detail-focused music.
Full Sony ULT Field 5 review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Output Power | 27W |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 7.3 lbs / 3.3 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Danny Pops: Don’t TOUCH that ULT Button! Sony ULT Field 5 Review More from DannyPops →
- Mark Ellis Reviews: Sony just changed summer sound 🤨 | Sony ULT Field 5 & 3 Review
- Dominik Reviews: Sony ULT Field 5 vs JBL Xtreme 4 - Outdoor Sound Test - Sony shines or not? More from Dominik Reviews →
- Joy & Oluv’Sone: Sony ULT Field 5 vs Anker SoundCore Boom 2 - listening test More from Oluv’Sone →
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Soundcore Boom 2 Plus: $179.99 Amazon B&H Photo Video eBay
Pros: Quite a bit lighter than most of the other boombox size speakers. This speaker will likely move up as we get a good EQ tune that makes it a lot more neutral.
Cons: Warm tuning meaning a rolled off treble and some upper bass boost. Reasonably deep bass, but not as good as the top ranked.
Full Soundcore Boom 2 Plus review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 39Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 17.3" x 9.1" x 5.9" (440 x 230 x 150 mm) |
| Drivers | 2x 114mm (4.5") woofers + 2x 19mm (0.75") tweeters |
| EQ | Yes (Pro EQ + presets) |
| IP Rating | IPX7 |
| Max Volume | 111dB |
| MicroSD Playback | No |
| Omnidirectional | No |
| Output Power | 140W |
| Party Mode | Yes (PartyCast 2.0) |
| Power Bank | Yes (USB-C, 5V/2A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 8.4 lbs / 3.8 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: This sounds totally different now! Soundcore Boom Plus 2 firmware 03.10 More from alanrossreviews →
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400?
- Jay’s Straight Up Reviews & More: Soundcore Boom 2 Plus VS Tribit Stormbox Blast 🛜 Boombox Basement Battle 📊Custom EQ 🔥Who You Got? More from JaysStraightUpReviews →
- Picky Audio: SO CLOSE! Soundcore Boom 2 Plus vs JBL Boombox 3
- Picky Audio: Extended Sound Test (Soundcore Boom 2 Plus vs JBL Boombox 3)
- Jay’s Straight Up Reviews & More: NEW RELEASE! Soundcore Boom 2 Plus vs Motion Boom Plus🤯Stock EQ, Bass^ Enabled🤜🤛 A Family Feud😆
- GYMCADDY: Soundcore Boom 2 Plus Showcase - Lots Of Bass In A Small Package More from GYMCADDY →
- EL JEFE REVIEWS: Soundcore Boom 2 Plus 💥 BIGGER & BADDER!
- Jagist reviews: Zealot S95 Vs Soundcore Boom 2 Plus!!! More from Jagistreviews →
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