Short answer: the B&O Beosound A5 for better sound quality, the Marshall Kilburn II for the lower price. The B&O Beosound A5 ranks #12 of 82 large speakers, rated 4.5/5, at $1,650. The Marshall Kilburn II ranks #39, rated 3.8/5, at $279, $1,371 cheaper.
Why pick the B&O Beosound A5: At 3.86 kg, B&O Beosound A5 combines 5.25” woofer, 2x 2” fullrange, 0.8” tweeter with Bluetooth and aux. Watch for: Bass is limited by its 32Hz - 23kHz (Manufacturer specified) specification.
Why pick the Marshall Kilburn II: 20W Class D amp + dual 8W tweeters. The tradeoff: Boosted upper bass, not very detailed, not as deep bass as competitors, upper mids peak.
Buy the B&O Beosound A5 when sound quality outweighs the price for you, and the Marshall Kilburn II when the price outweighs sound quality instead.
There is a real battery-life gap here: the Marshall Kilburn II is rated for 20 hours, the B&O Beosound A5 only 12 hours.
There is a real gap in water resistance: the B&O Beosound A5 at IP65 (water jets) against the Marshall Kilburn II, which has IPX2 (light drips).
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| B&O Beosound A5 | Marshall Kilburn II | |
|---|---|---|
| Price | $1,650.00 | $279.00 |
| Ranked | #12 of 82 in Large Size Portable Bluetooth Speakers | #39 of 82 in Large Size Portable Bluetooth Speakers |
| IP Rating | IP65 | IPX2 |
| Party Mode | Yes (Beolink Multiroom) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Yes | No |
| TWS | Yes | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| Weight | 8.5 lbs (3.86 kg) | 5.5 lbs (2.49 kg) |
| Wi-Fi | Yes | - |
| App | No | No |
| Aux Input | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Power Bank | No | No |
| Bluetooth Version | 5.2 | 5.0 |
| Dimensions | 11.2” x 7.4” x 5.1” (285 x 187 x 130 mm) | 9.6” x 6.4” x 5.5” (243 x 162 x 140 mm) |
| Drivers | 5.25” woofer, 2x 2” fullrange, 0.8” tweeter | 1x 4” (102mm) woofer + 2x 20mm dome tweeters |
| Frequency Response | 32Hz - 23kHz (Manufacturer specified) | - |
| Amplifier Power | 280W | 36W |
| Maximum SPL | 101dB (Manufacturer specified) | 102dB (Manufacturer specified) |
| Battery Life | 12+ hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bass Extension (-10dB) | - | ~58Hz |
| Strap | - | Yes (built-in strap) |
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Prices on this page were last checked September 26, 2026 at 11:14 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
B&O Beosound A5: $1,650.00 Amazon eBay
Pros: At 3.86 kg, B&O Beosound A5 combines 5.25” woofer, 2x 2” fullrange, 0.8” tweeter with Bluetooth and aux. Ip65 protection, up to 101db and mono playback make its feature set practical for its intended room or portable use. Reviews find the sound fairly neutral.
Cons: Bass is limited by its 32Hz - 23kHz (Manufacturer specified) specification. There is no companion app. No EQ adjustment.
Full B&O Beosound A5 review and specifications →
| Amplifier Power | 280W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 12+ hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 11.2” x 7.4” x 5.1” (285 x 187 x 130 mm) |
| Drivers | 5.25” woofer, 2x 2” fullrange, 0.8” tweeter |
| EQ | No |
| Frequency Response | 32Hz - 23kHz (Manufacturer specified) |
| IP Rating | IP65 |
| Maximum SPL | 101dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | Yes (Beolink Multiroom) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 8.5 lbs (3.86 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- B&O Beosound A5 vs Harman Kardon Citation 200
- B&O Beosound A5 vs Marshall Stockwell II
- B&O Beosound A5 vs Soundcore Boom 2
- B&O Beosound A5 vs Bose SoundLink Max
- B&O Beosound A5 vs JBL Xtreme 3
- B&O Beosound A5 vs Soundcore Motion X600
- B&O Beosound A5 vs Tribit Stormbox Lava
- B&O Beosound A5 vs JBL Xtreme 5
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Marshall Kilburn II: $279.00 Amazon eBay
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 →
| Amplifier Power | 36W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~58Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| 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) |
- Reviews, Comparisons and Sound Samples
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