Short answer: the Brane X for bass, the Marshall Stockwell 2 for a more natural tone. The Brane X has the absolute deepest bass in the category, though its upper bass is boosted around 120Hz and its treble rolled off, so it misses detail up top. The Stockwell 2 is possibly the most natural sounding Marshall speaker, but it is not stereo.
The case for the Brane X: Very deep bass, the absolute deepest from this category. Set against that: Boosted upper bass ~120Hz, rolled off treble, so it’s missing detail up top.
What the Marshall Stockwell 2 gets right: Possibly the most natural sounding Marshall speaker. Set against that: Not stereo.
Buy the Brane X if sound quality matters more than the price. Buy the Marshall Stockwell 2 if the price matters more than sound quality.
Battery life favors the Marshall Stockwell 2: rated for 20 hours against 12 hours for the Brane X.
There is a real gap in water resistance: the Brane X at IP57 (brief submersion) against the Marshall Stockwell 2, which has IPX4 (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Brane X | Marshall Stockwell 2 | |
|---|---|---|
| Price | $500 | $229.99 |
| Ranked | #4 of 78 in Large Size Portable Bluetooth Speakers | #11 of 78 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 295ms default, 33ms with aux pass-through | - |
| Bass Extension (-10dB) | 31Hz | 44Hz |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX HD, aptX, AAC, SBC | SBC |
| IP Rating | IP57 | IPX4 |
| Bluetooth Latency | 100ms | 50ms |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | 96dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Brane app, up to 8 speakers) | No |
| Power Input | AC Power brick | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Weight | 7.7 lbs (3.5 kg) | 3.1 lbs (1.4 kg) |
| Wi-Fi | Yes | - |
| App | No | No |
| Built-in Microphone | Yes | Yes |
| Voice Assistants | Amazon Alexa | - |
| EQ | No | No |
| Power Bank | No | No |
| Dimensions | 9.3" x 7" x 6.1" (236 x 178 x 155 mm) | 7.1" x 6.3" x 2.8" (180 x 161 x 70 mm) |
| Drivers | 2x 2.5" midrange, 2x 0.75" tweeters + 6.5"x9" subwoofer | 3" woofer, 2x 2" fullrange tweeters |
| Frequency Response | 30Hz - 20kHz (Manufacturer specified) | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 200W | 20W |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.1 | 5.0 |
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Prices on this page were last checked September 23, 2026 at 11:24 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
Brane X: $500 Amazon eBay
Pros: The Brane X pairs a dedicated RAD subwoofer with two midrange drivers and two tweeters to achieve extraordinary low bass for a 3.5kg portable: its measured -10dB extension is 31Hz. Independent testing finds it loud, with well-balanced mids, a smooth treble balance and useful bass-level controls; Wi-Fi, AirPlay, Alexa, quality Bluetooth codecs and low-latency aux pass-through make it unusually versatile. Measured bass extension of 31Hz (-10dB).
Cons: The front-facing design has only moderate dispersion, so sound changes noticeably off to the sides or behind it. Bass response shifts at maximum volume, the default aux mode has very high latency, and some listeners find the upper register edgy or need EQ to achieve their preferred balance. Its claimed 12-hour runtime and premium cost make it more of a compact high-end system than a carefree all-day speaker.
Full Brane X review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 295ms default, 33ms with aux pass-through |
| Bass Extension (-10dB) | 31Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX HD, aptX, AAC, SBC |
| Bluetooth Latency | 100ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.3" x 7" x 6.1" (236 x 178 x 155 mm) |
| Drivers | 2x 2.5" midrange, 2x 0.75" tweeters + 6.5"x9" subwoofer |
| EQ | No |
| Frequency Response | 30Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP57 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Brane app, up to 8 speakers) |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | Yes |
| Voice Assistants | Amazon Alexa |
| Weight | 7.7 lbs (3.5 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: This speaker left me shocked! Brane X, they said it defies the laws of physics! More from alanrossreviews →
- Alan Ross Reviews: Brane X vs JBL Xtreme 5: Maximum Bass, No Mercy
- Alan Ross Reviews: JBL Boombox 4 HUMILIATES Brane X?! Ultimate Bass Battle!
- Alan Ross Reviews: Minirig 2.1 or the Brane X or the Harman Kardon Go Play 3?
- mark: Brane X Speaker Review 2
- mark: Brane X Speaker Review
- Head-to-Head Comparisons
Marshall Stockwell 2: $229.99 Amazon eBay
Pros: Marshall Stockwell 2 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. Measured bass extension of 44Hz (-10dB).
Cons: Bass is limited by its 44Hz specification. There is no companion app. No EQ adjustment.
Full Marshall Stockwell 2 review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 44Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| 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 |
| TWS | No |
| Weight | 3.1 lbs (1.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Marshall Stockwell 2 vs Soundcore Motion Boom and Motion Plus! expensive is better? More from alanrossreviews →
- Alan Ross Reviews: Marshall Stockwell 2 vs Denon 250bt - little and large? 🙈
- Alan Ross Reviews: Marshall Stockwell 2 Review and huge sound test! - vs JBL Charge 5! 💯
- Alan Ross Reviews: Marshall Emberton vs Marshall Stockwell 2 - little guy goes louder?? 🤓
- Oluv Patreon: Marshall Stockwell III vs Stockwell II More from Oluv’Sone →
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