Short answer: neither the Sony ULT Field 5 nor the Ultimate Ears Epicboom is a clean winner on sound, so choose by use case. Sony brings an IP67 enclosure and a more purpose-built outdoor feature set, while the Epicboom offers USB-C charging and a rated 17-hour battery.
Both speakers give away low-bass depth for their size. The Sony’s overall tuning is only middling, while the Epicboom also stops short in the bottom octave. That makes durability, charging convenience, and the sound signature you prefer more important than a headline rank alone.
What the Sony ULT Field 5 gets right: IP67 rated, dustproof and water resistant. Set against that: Bass not as deep as others in the category, and sound quality overall is just okay.
On the Ultimate Ears Epicboom side: 17 hour battery with USB-C charging (first UE portable with USB-C). The tradeoff: Not very deep bass for the size.
Buy the Sony ULT Field 5 if you need the dustproof, waterproof speaker for outdoor use.
Buy the Ultimate Ears Epicboom if USB-C charging and its longer stated runtime better suit your routine.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony ULT Field 5 | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $198 | $213.41 |
| Ranked | #41 of 78 in Large Size Portable Bluetooth Speakers | #58 of 78 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 25 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 5.2 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) | 4.7" x 9.5" x 6.4" (119 x 241 x 162 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 1x 120mm woofer, 2x 45mm tweeters |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 kg) | 4.3 lbs (1.97 kg) |
| Amplifier Power | 27W | 10W RMS |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | ~55Hz |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Maximum SPL | - | 94dB (Manufacturer specified) |
Related Speaker Comparisons
How Sony ULT Field 5 compares with other leading options:
- Sony ULT Field 5 vs Vifa Helsinki
- JBL Xtreme 5 vs Sony ULT Field 5
- Tribit Stormbox Lava vs Sony ULT Field 5
- Sony ULT Field 5 vs Brane X
- Minirig 4 with subwoofer vs Sony ULT Field 5
Prices on this page were last checked September 22, 2026 at 5:11 AM 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
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 →
| Amplifier Power | 27W |
|---|---|
| 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 |
| 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 →
- Head-to-Head Comparisons
Ultimate Ears Epicboom: $213.41 Amazon eBay
Pros: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Made mostly from recycled fabric and plastic. Large best-sounding UE portable that still feels portable. 180ft Bluetooth range. Measured bass extension of ~55Hz (-10dB).
Cons: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
Full Ultimate Ears Epicboom review and specifications →
| Amplifier Power | 10W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.7" x 9.5" x 6.4" (119 x 241 x 162 mm) |
| Drivers | 1x 120mm woofer, 2x 45mm tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 94dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 4.3 lbs (1.97 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: Bass Check 💣 Treblab HD-360, Ultimate Ears EpicBoom, Marshall Middleton & JBL Pulse 5. Boom or Bust? More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: $350 Ultimate Ears EpicBoom gets Epic Beat-Down 😮by $120 Soundcore Rave Neo 2. Bluetooth Speaker KO🤛
- Jay’s Straight Up Reviews & More: Bose SoundLink Max vs. Ultimate Ears EpicBoom 🤑Big Bucks No Whammies? 💣 Let’s Find Out 😧
- Head-to-Head Comparisons
- Ultimate Ears Epicboom vs Dali Katch G2
- Ultimate Ears Epicboom vs Xdobo X8 Max
- Ultimate Ears Epicboom vs Marshall Stockwell III
- Ultimate Ears Epicboom vs Sony SRS-XG300
- Ultimate Ears Epicboom vs B&O Beosound Level
- Ultimate Ears Epicboom vs Klipsch Detroit
- Ultimate Ears Epicboom vs Ultimate Ears Megablast
- Ultimate Ears Epicboom vs Doss Soundbox XL
- See all 49 comparisons