Short answer: the Sonos Move 2. It ranks #28 of 97 large speakers by sound quality, rated 4.1/5, at $496.11. The Marshall Kilburn III ranks #41, rated 3.8/5, at $379.99, $116.12 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Sonos Move 2 is the tougher pick. Warm sounding with somewhat rolled off treble. It is rated IP56 against IP54 for the Marshall Kilburn III. Watch for: Not very loud.
The Marshall Kilburn III is the longer-running pick. 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.
Buy the Sonos Move 2. It is rated higher for sound quality, and the $116.12 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
| Sonos Move 2 | Marshall Kilburn III | |
|---|---|---|
| Price | $496.11 | $379.99 |
| Ranked | #28 of 97 in Large Size Portable Bluetooth Speakers | #41 of 97 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 50 hours (Manufacturer specified) |
| IP Rating | IP56 | IP54 |
| Power Bank | Yes (USB-C) | Yes |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 6.6 lbs (3 kg) | 6.3 lbs (2.85 kg) |
| Wi-Fi | Yes | - |
| App | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC |
| Built-in Microphone | Yes | No |
| Voice Assistants | Amazon Alexa (Sonos Voice Control also built in) | - |
| EQ | No | Yes |
| Party Mode | No | Yes (Auracast) |
| TWS | Yes | Yes |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 9.5” x 6.3” x 5” (242 x 160 x 126 mm) | 10.7” x 5.9” x 6.7” (272 x 150 x 170 mm) |
| Drivers | mid-woofer, 2x angled tweeters | 1x 4” woofer + 2x 2” full-range drivers |
| Digital Aux Input | No | No |
| Strap | No | Yes (built-in strap) |
| Amplifier Power | - | 50W |
| Bass Extension (-10dB) | - | 45Hz |
| Frequency Response | - | 45Hz - 20kHz |
| Maximum SPL | - | 91dB |
Related Speaker Comparisons
How Sonos Move 2 compares with other leading options:
- Sonos Move 2 vs Vifa Helsinki
- JBL Xtreme 5 vs Sonos Move 2
- Sonos Move 2 vs Tribit Stormbox Lava
- Brane X vs Sonos Move 2
- Sonos Move 2 vs Minirig 4 with subwoofer
Prices on this page were last checked October 2, 2026 at 10:18 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
Sonos Move 2: $496.11 Amazon eBay
Older model: the Sonos Move (ranked lower, rated 4.1/5).
Pros: Warm sounding with somewhat rolled off treble. Slightly better midrange clarity than the Move 1.
Cons: Not very loud. It may share the Move 1’s full-volume issues, though more sound samples at full volume are needed to confirm that.
Full Sonos Move 2 review and specifications →
| 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
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Marshall Kilburn III: $379.99 Amazon eBay
Older model: the Marshall Kilburn II (ranked lower, rated 3.8/5).
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. 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 →
| 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
- Head-to-Head Comparisons
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