Short answer: the Sonos Move 2. It ranks #28 of 105 large speakers by sound quality, rated 4.1/5, at $480. The Marshall Kilburn III ranks #42, rated 3.8/5, at $379.99, $100.01 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Marshall Kilburn III is the longer-running choice. Spacious soundstage with broad stereo dispersion from Marshall’s True Stereophonic multi-driver layout, delivering warm, room-filling sound with 45Hz bass extension. It is rated for 50 hours of battery against 24 for the Sonos Move 2. It supports AAC Bluetooth, which the Sonos Move 2 lacks. It links with other speakers (Auracast), which the Sonos Move 2 cannot. Watch for: Noticeable dips in the midrange compromise frequency response neutrality, making vocals and acoustic instruments sound somewhat recessed or muffled compared to more linear competitors like the JBL Xtreme 4 unless the bass dial is dialed back.
The Sonos Move 2 is the tougher choice. Warm sounding with somewhat rolled off treble. It is rated IP56 against IP54 for the Marshall Kilburn III. The catch: Not very loud.
Buy the Sonos Move 2. It is rated higher for sound quality, and the $100.01 saving on the Marshall Kilburn III is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Marshall Kilburn III | Sonos Move 2 | |
|---|---|---|
| Price | $379.99 | $480.00 |
| Ranked | #42 of 105 in Large Size Portable Bluetooth Speakers | #28 of 105 in Large Size Portable Bluetooth Speakers |
| Amplifier Power | 50W | - |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 45Hz | - |
| Battery Life | 50 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC | SBC |
| Bluetooth Version | 5.3 | 5.0 |
| Built-in Microphone | No | Yes |
| Digital Aux Input | No | No |
| Dimensions | 10.7” x 5.9” x 6.7” (272 x 150 x 170 mm) | 9.5” x 6.3” x 5” (242 x 160 x 126 mm) |
| Drivers | 1x 4” woofer + 2x 2” full-range drivers | mid-woofer, 2x angled tweeters |
| EQ | Yes | No |
| Frequency Response | 45Hz - 20kHz | - |
| IP Rating | IP54 | IP56 |
| Maximum SPL | 91dB | - |
| Omnidirectional | No | No |
| Party Mode | Yes (Auracast) | No |
| Power Bank | Yes | Yes (USB-C) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Strap | Yes (built-in strap) | No |
| TWS | Yes | Yes |
| Weight | 6.3 lbs (2.85 kg) | 6.6 lbs (3 kg) |
| Wi-Fi | - | Yes |
| Voice Assistants | - | Amazon Alexa (Sonos Voice Control also built in) |
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Prices on this page were last checked October 11, 2026 at 4:59 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 Kilburn III: $379.99 Amazon $379.99 eBay
Older model: the Marshall Kilburn II (ranked lower, rated 3.8/5). See every Marshall Portable Speakers generation.
Same family: the Marshall Willen II (smaller model, rated 4/5), the Marshall Emberton III (smaller model, rated 2.7/5), the Marshall Middleton II (smaller model, ranked higher, rated 4.1/5) and the Marshall Stockwell III (smaller model, ranked lower, rated 3/5).
Pros: Spacious soundstage with broad stereo dispersion from Marshall’s True Stereophonic multi-driver layout, delivering warm, room-filling sound with 45Hz bass extension. Independent physical bass and treble dials allow quick tonal adjustments on the fly, backed by app-based EQ and placement compensation. Battery life is outstanding at up to 50+ hours with USB-C power-bank charging, IP54 splash resistance, 3.5mm aux input, and Bluetooth 5.3 with Auracast broadcast support. Measured bass extension of 45Hz (-10dB).
Cons: Noticeable dips in the midrange compromise frequency response neutrality, making vocals and acoustic instruments sound somewhat recessed or muffled compared to more linear competitors like the JBL Xtreme 4 unless the bass dial is dialed back. The Marshall Kilburn II retains slightly punchier perceived loudness at maximum volume due to a more aggressive V-shaped contour. At 2.85 kg with only IP54 splash resistance, it is heavy and cannot withstand water immersion. Lacks a built-in microphone and LDAC codec support.
Full Marshall Kilburn III review and specifications →
| Released | May 2025 (1 year ago) |
|---|---|
| Amplifier Power | 50W |
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 50 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10.7” x 5.9” x 6.7” (272 x 150 x 170 mm) |
| Drivers | 1x 4” woofer + 2x 2” full-range drivers |
| EQ | Yes |
| Frequency Response | 45Hz - 20kHz |
| IP Rating | IP54 |
| Maximum SPL | 91dB |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in strap) |
| TWS | Yes |
| Weight | 6.3 lbs (2.85 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Mateusz Cholewa: Marshall Kilburn 3 vs Marshall Middleton 2 Opinion in Subtitles More from Mateusz Cholewa →
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- Mateusz Cholewa: Marshall Kilburn 3 vs Marshall Kilburn 2
- Mateusz Cholewa: New 2025😎 Marshall Kilburn 3 UNBOXING 📦Audio TEST vs Kilburn 2
- Mateusz Cholewa: Marshall Kilburn 3 vs Jbl Boombox 3 WiFi Czy to najlepszy Boombox? - Który lepszy w muzyce ROCK?
- Mateusz Cholewa: Marshall Kilburn 3 DEEP BASS👌💪💖🆚 Marshall Kilburn 2 Outside
- Mateusz Cholewa: MARSHALL Kilburn 3 vs SONY ULT Field 5
- Mateusz Cholewa: Marshall Kilburn 3 vs JBL Xtreme 4 – OUTSIDE🤗
- Mateusz Cholewa: Marshall Kilburn 3 Deep Bass vs Tribit Stormbox Lava Deep Bass
- Storytripper HD: Marshall Kilburn III vs JBL Xtreme 5 (Verion Outdoor) More from storytripperhd →
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- What Hi-Fi?: Marshall Kilburn III review
- RTINGS: Marshall Kilburn III Speaker Review More from Rtings.com →
- Head-to-Head Comparisons
- Marshall Kilburn III vs Marshall Kilburn II
- Marshall Kilburn III vs JBL Xtreme 4
- Marshall Kilburn III vs Marshall Middleton
- Marshall Kilburn III vs Marshall Middleton II
- Marshall Kilburn III vs Sony ULT Field 5
- Marshall Kilburn III vs Tribit Stormbox Lava
- Marshall Kilburn III vs JBL Xtreme 5
- Marshall Kilburn III vs EarFun Uboom X
- See all 10 comparisons
Sonos Move 2: $480.00 Amazon $480.00 eBay
Older model: the Sonos Move (ranked lower, rated 4.1/5). See every Sonos Move generation.
Pros: Warm sounding with somewhat rolled off treble. Slightly better midrange clarity than the Sonos Move.
Cons: Not very loud. It may share the Sonos Move’s full-volume issues, though more sound samples at full volume are needed to confirm that.
Full Sonos Move 2 review and specifications →
| Released | Sep 2023 (3 years ago) |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.5” x 6.3” x 5” (242 x 160 x 126 mm) |
| Drivers | mid-woofer, 2x angled tweeters |
| EQ | No |
| IP Rating | IP56 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Voice Assistants | Amazon Alexa (Sonos Voice Control also built in) |
| Weight | 6.6 lbs (3 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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