Short answer: the Sony SRS-XB43. It ranks #42 of 77 large speakers by sound quality at $150; the Ultimate Ears Epicboom ranks #57 and costs $224.64, so there is not much of a tradeoff to weigh.
On the Sony SRS-XB43 side: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. The catch: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.
What the Ultimate Ears Epicboom gets right: 17 hour battery with USB-C charging (first UE portable with USB-C). IP67 rating, floats in water. Set against that: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
Buy the Sony SRS-XB43. It ranks higher for sound quality than the Ultimate Ears Epicboom and costs less, so there is no real case for the other one.

Specifications Side By Side
| Sony SRS-XB43 | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $150 | $224.64 |
| Ranked | #42 of 77 in Large Size Portable Bluetooth Speakers | #57 of 77 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 53Hz | ~55Hz |
| Battery Life | 24 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| Bluetooth Latency | 85ms | - |
| Max Volume | 99dB | 94dB |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-A, 5V/1A) | No |
| Weight | 6.5 lbs / 2.95 kg | 4.3 lbs / 1.97 kg |
| App | Yes (Sony Music Center App) | No |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Built in Microphone | Yes | Yes |
| EQ | Yes (3 band) | No |
| IP Rating | IP67 | IPX7 |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 12.8" x 4.8" x 4.6" (325 x 123 x 117 mm) | 4.7" x 9.5" x 6.4" (119 x 241 x 162 mm) |
| Output Power | 32W RMS | 10W RMS |
| Drivers | 63mm woofer + 12.5mm tweeter + passive radiators | 1x 120mm woofer, 2x 45mm tweeters |
| Digital Aux Input | No | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
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The Two Speakers In Full
Sony SRS-XB43: $150
Pros: Full, warm sound with deep, rich bass. Twin passive radiators deliver Extra Bass impact. IPX7 waterproof and rugged. Up to 24 hour battery (14 hours with lights on). Party lights for visual appeal.
Cons: Not as loud as others in the category. Speaker will not remain at max volume and will turn itself down automatically.
Setup: Try out +3 +6 +3 as an EQ to get it as flat as possible as mentioned in the Alan Ross video
Full Sony SRS-XB43 review and specifications →
| App | Yes (Sony Music Center App) |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Latency | 85ms |
| Bluetooth Version | 5.0 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.8" x 4.8" x 4.6" (325 x 123 x 117 mm) |
| Drivers | 63mm woofer + 12.5mm tweeter + passive radiators |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Max Volume | 99dB |
| Omnidirectional | No |
| Output Power | 32W RMS |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 6.5 lbs / 2.95 kg |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Xtreme 3 vs Sony XB43 - boombox champ?
- Alan Ross Reviews: JBL Charge 5 vs Motion Boom vs Sony XB43 - a step to far? 🤪
- Alan Ross Reviews: Sony xb33 vs xb43 vs Soundcore Motion Plus speakers test
- DLX Willington: Who Sounds The Best Of Sony XG300, XB43 & JBL XTREME3 With Sound Sample BLIND CHALLENGE Reveal.
- Reddit Search for Sony SRS-XB43 Review
- Head-to-Head Comparisons
Ultimate Ears Epicboom: $224.64 Amazon
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.
Cons: Not very deep bass for the size. Gets distorted at around 70-80% with bass thuds.
Full Ultimate Ears Epicboom review and specifications →
| 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 |
| Max Volume | 94dB |
| Omnidirectional | No |
| Output Power | 10W RMS |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 4.3 lbs / 1.97 kg |
As an eBay Partner, we may be compensated if you make a purchase.
- 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?
- 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 😧
- Reddit Search for Ultimate Ears Epicboom Review
- Head-to-Head Comparisons
- Ultimate Ears Epicboom vs Sony SRS-XG300
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- Ultimate Ears Epicboom vs JBL Xtreme
- Ultimate Ears Epicboom vs LG PN7
- Ultimate Ears Epicboom vs Soundcore Rave Neo
- See all 17 comparisons

