Short answer: the Marshall Stockwell II. It ranks #11 of 105 large speakers by sound quality, rated 4.5/5, at $226; the Ultimate Ears Epicboom ranks #83, rated 2.9/5, and costs $228.59, so there is not much of a tradeoff to weigh.
The Marshall Stockwell II is the better-sounding, deeper-bass option. Possibly the most natural sounding Marshall speaker, with excellent off-axis sound. Its bass reaches about 44Hz before falling 10dB, against 55Hz for the Ultimate Ears Epicboom. At 3.1 lbs (1.4 kg) it weighs noticeably less than the Ultimate Ears Epicboom at 4.3 lbs (1.97 kg). The catch: Not very loud, and the added DSP reverb may annoy purists.
The Ultimate Ears Epicboom is the tougher choice. 17 hour battery with USB-C charging (first UE portable with USB-C). It is rated IPX7 against IPX4 for the Marshall Stockwell II. It plays in stereo from a single unit, unlike the Marshall Stockwell II. The tradeoff: Not very deep bass for the size.
Buy the Marshall Stockwell II. It is rated higher for sound quality than the Ultimate Ears Epicboom and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Marshall Stockwell II | Ultimate Ears Epicboom | |
|---|---|---|
| Price | $226.00 | $228.59 |
| Ranked | #11 of 105 in Large Size Portable Bluetooth Speakers | #83 of 105 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 44Hz | ~55Hz |
| Battery Life | 20 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| IP Rating | IPX4 | IPX7 |
| Bluetooth Latency | 50ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 94dB (Manufacturer specified) |
| Party Mode | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| Weight | 3.1 lbs (1.4 kg) | 4.3 lbs (1.97 kg) |
| App | No | No |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Power Bank | No | No |
| Bluetooth Version | 5.0 | 5.2 |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) | 4.7” x 9.5” x 6.4” (119 x 241 x 162 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters | 1x 120mm woofer, 2x 45mm tweeters |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 20W | 10W RMS |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (built-in loop) |
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Prices on this page were last checked October 12, 2026 at 4:13 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
Marshall Stockwell II: $226.00 Amazon $226.00 eBay
Newer model: the Marshall Stockwell III, ranked lower, rated 3/5, released Jun 2026. It adds power bank charging, app control, adjustable EQ and AAC. Water resistance goes from IPX4 to IP55. See every Marshall Portable Speakers generation.
Pros: Marshall Stockwell II uses 3” woofer, 2x 2” fullrange tweeters. Its 1.4 kg, claimed 20 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 96dB and mono playback make it a practical option for its intended room or portable use. Possibly the most natural sounding Marshall speaker, with excellent off-axis sound. Measured bass extension of 44Hz (-10dB).
Cons: Bass is limited by its 44Hz specification. There is no companion app. No EQ adjustment. Not very loud, and the added DSP reverb may annoy purists.
Full Marshall Stockwell II review and specifications →
| Released | May 2019 (7 years ago) |
|---|---|
| Amplifier Power | 20W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 44Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 50ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.1” x 6.3” x 2.8” (180 x 161 x 70 mm) |
| Drivers | 3” woofer, 2x 2” fullrange tweeters |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX4 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| Weight | 3.1 lbs (1.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Marshall Stockwell III vs II - sound test More from Oluv’Sone →
- Oluv Patreon: Marshall Stockwell III vs Stockwell II
- Alan Ross Reviews: Marshall Stockwell 2 Review and huge sound test! - vs JBL Charge 5! 💯 More from alanrossreviews →
- Alan Ross Reviews: Marshall Emberton vs Marshall Stockwell 2 - little guy goes louder?? 🤓
- Alan Ross Reviews: Marshall Stockwell 2 vs Soundcore Motion Boom and Motion Plus! expensive is better?
- Alan Ross Reviews: Marshall Stockwell 2 vs Denon 250bt - little and large? 🙈
- Alan Ross Reviews: Dali Katch G2 high end audio takes on the entire world of bluetooth speakers! 👌👋
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Ultimate Ears Epicboom: $228.59 Amazon $228.59 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 →
| Released | Sep 2023 (3 years ago) |
|---|---|
| Amplifier Power | 10W RMS |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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 |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 4.3 lbs (1.97 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: $350 Ultimate Ears EpicBoom gets Epic Beat-Down 😮by $120 Soundcore Rave Neo 2. Bluetooth Speaker KO🤛 More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Bose SoundLink Max vs. Ultimate Ears EpicBoom 🤑Big Bucks No Whammies? 💣 Let’s Find Out 😧
- Jay’s Straight Up Reviews & More: Bass Check 💣 Treblab HD-360, Ultimate Ears EpicBoom, Marshall Middleton & JBL Pulse 5. Boom or Bust?
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