Short answer: the Soundcore Boom 2, if you are buying new. The Soundcore Motion Boom ranks higher than the Marshall Kilburn II (#14 vs #43 of 105 large speakers) but is discontinued; its replacement, the Soundcore Boom 2, is rated 4.5/5 at $99.99 and is still sold new.
The Soundcore Motion Boom is the better-sounding, lighter pick. 30W loud bass-heavy sound, excellent budget-friendly value. At 3.3 lbs (1.5 kg) it weighs much less than the Marshall Kilburn II at 5.5 lbs (2.49 kg). It is rated IPX7 against IPX2 for the Marshall Kilburn II. It has an adjustable EQ, which the Marshall Kilburn II lacks. The tradeoff: Not as neutral or detailed as other top ranked speakers.
What the Marshall Kilburn II does well: 20W Class D amp + dual 8W tweeters. It keeps a wired aux input, which the Soundcore Motion Boom lacks. The tradeoff: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak.
Buy the Soundcore Boom 2, the replacement for the discontinued Soundcore Motion Boom; it is rated higher for sound quality than the Marshall Kilburn II.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore Motion Boom | Marshall Kilburn II | |
|---|---|---|
| Price | $109.99 Discontinued | $279.00 |
| Ranked | #14 of 105 in Large Size Portable Bluetooth Speakers | #43 of 105 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 53Hz | ~58Hz |
| Battery Life | 24 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IPX7 | IPX2 |
| Bluetooth Latency | 170ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | 102dB (Manufacturer specified) |
| Party Mode | No | No |
| Power Bank | Yes (USB-A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 3.3 lbs (1.5 kg) | 5.5 lbs (2.49 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Bluetooth Version | 5.0 | 5.0 |
| Dimensions | 13.6” x 7.9” x 5.8” (346 x 200 x 148 mm) | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) |
| Drivers | 2x 63.5mm titanium fullrange drivers + 2x passive radiators | 1x 4” (102mm) woofer + 2x 20mm dome tweeters |
| Amplifier Power | 30W | 36W |
| Digital Aux Input | No | No |
| Strap | - | Yes (built-in strap) |
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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
Soundcore Motion Boom: $109.99 Discontinued Amazon $109.99 eBay
Newer model: the Soundcore Boom 2, ranked higher, rated 4.5/5, released Mar 2024. It adds party mode, but drops the built-in mic. See every Soundcore Boom generation.
Pros: 30W loud bass-heavy sound, excellent budget-friendly value. 10,000mAh battery for 24 hours claimed (15-18 hours with BassUp engaged at high volume). Waterproof, buoyant design, convenient carry handle. PowerIQ USB port charges devices. BassUp feature works well with clear mids/highs. Measured bass extension of 53Hz (-10dB).
Cons: Not as neutral or detailed as other top ranked speakers. Discontinued.
Full Soundcore Motion Boom review and specifications →
| Released | Dec 2020 (5 years ago) |
|---|---|
| Amplifier Power | 30W |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 170ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 13.6” x 7.9” x 5.8” (346 x 200 x 148 mm) |
| Drivers | 2x 63.5mm titanium fullrange drivers + 2x passive radiators |
| EQ | Yes |
| IP Rating | IPX7 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 3.3 lbs (1.5 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: This is shocking! They broke the world pound for pound champ! 😢 More from alanrossreviews →
- Alan Ross Reviews: Mifa Wildbox vs Soundcore Motion Boom Review! its a close one! 💯
- Alan Ross Reviews: Minirig mk3 2.2 (2x subwoofers) vs 2x Soundcore Motion Booms 🤑
- Alan Ross Reviews: W-King X10 (70w) vs Soundcore Motion Boom (30w) - value for money? 🤑
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- Alan Ross Reviews: Marshall Stockwell 2 vs Soundcore Motion Boom and Motion Plus! expensive is better?
- Alan Ross Reviews: Soundcore Motion Boom vs W-King D8 and D9 - boom boom! 🥳
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- Alan Ross Reviews: Tribit Stormbox Blast or two Motion Boom Pluses for best cheap boombox?
- Techder Audios: SONY XG300 VS SOUNDCORE MOTION BOOM More from techderaudios →
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- CEONTHEMAKING: Soundcore Boom 2 - HANDS DOWN The Best Speaker Under $150! More from CEONTHEMAKING →
- Snow Queen’s Tech: ANKER SOUNDCORE SELECT PRO VS MOTION BOOM - DO THEY SOUND THE SAME? SOUND TEST ( PLEASE WEAR 🎧)
- Head-to-Head Comparisons
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Marshall Kilburn II: $279.00 Amazon $279.00 eBay
Newer model: the Marshall Kilburn III, ranked higher, rated 3.8/5, released May 2025. It adds power bank charging, app control, adjustable EQ and party mode, but drops the built-in mic. Battery life goes from 20 to 50 hours. Water resistance goes from IPX2 to IP54. See every Marshall Portable Speakers generation.
Pros: 20W Class D amp + dual 8W tweeters. 20+ hour battery with quick-charge (20 min charges 3 hours of play). Rugged design with leather handle and reinforced corners, IPX2 rated. Thrives with rock music. Bluetooth 5.0 with 30ft range. Measured bass extension of ~58Hz (-10dB).
Cons: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak. Very low IPX2 water rating. AC charging
Full Marshall Kilburn II review and specifications →
| Released | Aug 2018 (8 years ago) |
|---|---|
| Amplifier Power | 36W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~58Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) |
| Drivers | 1x 4” (102mm) woofer + 2x 20mm dome tweeters |
| EQ | No |
| IP Rating | IPX2 |
| Maximum SPL | 102dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in strap) |
| TWS | Yes |
| Weight | 5.5 lbs (2.49 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Mateusz Cholewa: Marshall Kilburn 3 vs Marshall Kilburn 2 More from Mateusz Cholewa →
- Mateusz Cholewa: New 2025😎 Marshall Kilburn 3 UNBOXING 📦Audio TEST vs Kilburn 2
- Mateusz Cholewa: Marshall Kilburn 3 DEEP BASS👌💪💖🆚 Marshall Kilburn 2 Outside
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