Short answer: the Harman Kardon Luna 2. Both are rated 4.1/5 for sound quality (#25 and #19 of 177 medium speakers), and the Harman Kardon Luna 2 costs $199.95 against $399 for the B&O Beosound A1 3rd gen, so with nothing between them on sound quality, price settles it.
Why pick the Harman Kardon Luna 2: A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit. The catch: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The B&O Beosound A1 3rd gen is the longer-running, lighter option. A premium waterproof puck speaker with good sound, a long battery, and a battery you can swap, built to last. It is rated for 24 hours of battery against 12 for the Harman Kardon Luna 2. At 1.2 lbs (558 g) it weighs noticeably less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It supports aptX Adaptive Bluetooth, which the Harman Kardon Luna 2 lacks. Watch for: Distorts easier than the 2nd gen with deeper bass.
Buy the Harman Kardon Luna 2. Both are rated the same for sound quality, and it costs $199.05 less than the B&O Beosound A1 3rd gen.
Want more options? Browse the full Portable Bluetooth rankings.
A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit.
A premium waterproof puck speaker with good sound, a long battery, and a battery you can swap, built to last.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Harman Kardon Luna 2 | B&O Beosound A1 3rd gen | |
|---|---|---|
| Price | $199.95 | $399.00 |
| Ranked | #25 of 177 in Medium Size Portable Bluetooth Speakers | #19 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, aptX Adaptive |
| EQ | Yes (4 presets + custom) | Yes |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 1.2 lbs (558 g) |
| Bluetooth Version | 5.4 | 5.1 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 5.2” x 1.8” x 5.2” (133 x 46 x 133 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 82.5mm woofer, 15mm tweeter |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 60W |
| Digital Aux Input | No | Yes (USB-C) |
| Strap | No | Yes (built-in strap) |
| Built-in Microphone | - | Yes |
| Power Bank | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for B&O Beosound A1 3rd gen: