Short answer: the Harman Kardon Luna. It ranks #24 of 150 medium speakers by sound quality, rated 4.0/5, at $290.99. The Altec Lansing Lifejacket 2 ranks #149, rated 2.0/5, at $69.99, $221 cheaper, a saving that is not big enough to make up the sound-quality gap.
Why pick the Harman Kardon Luna: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. The tradeoff: Bass is limited by its 57Hz specification.
The case for the Altec Lansing Lifejacket 2: Tank-like build quality: reviewers have frozen it, dropped it, and buried it in sand with no issues. The tradeoff: Barely any bass, “pathetic sounding” said Jay’s Reviews of the line generally.
Buy the Harman Kardon Luna. It is rated higher for sound quality, and the $221 you would save on the Altec Lansing Lifejacket 2 does not close the gap.
There is a real battery-life gap here: the Altec Lansing Lifejacket 2 is rated for 30 hours, the Harman Kardon Luna only 12 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna | Altec Lansing Lifejacket 2 | |
|---|---|---|
| Price | $290.99 | $69.99 |
| Ranked | #24 of 150 in Medium Size Portable Bluetooth Speakers | #149 of 150 in Medium Size Portable Bluetooth Speakers |
| App | No | - |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 57Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| EQ | No | - |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 2.7 lbs (1.22 kg) |
| Bluetooth Version | 5.3 | - |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 8.6” x 4.2” x 4.6” (218 x 107 x 117 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 4.5” (114mm) woofer |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | 10W |
| Digital Aux Input | No | No |
| Built-in Microphone | - | Yes |
| Power Bank | - | Yes |
| Strap | - | Yes (mounting clip) |
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Prices on this page were last checked September 30, 2026 at 2:57 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
Harman Kardon Luna: $290.99 Amazon eBay
Newer model: the Harman Kardon Luna 2, ranked higher, rated 4.1/5.
Pros: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Its 1.13 kg, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. The sound is fairly balanced apart from the boosted bass. Measured bass extension of 57Hz (-10dB).
Cons: Bass is limited by its 57Hz specification. There is no companion app. No EQ adjustment. Boosted bass, and less detailed than higher-ranked speakers.
Full Harman Kardon Luna review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 57Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 2.5 lbs (1.13 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Altec Lansing Lifejacket 2: $69.99 Amazon eBay
Newer model: the Altec Lansing Lifejacket 3, ranked higher, rated 2/5.
Pros: Tank-like build quality: reviewers have frozen it, dropped it, and buried it in sand with no issues. IP67 rated; doubles as a power bank. Universal mounting clip for a bike, kayak, or backpack. Built-in speakerphone with voice-confirmed caller ID.
Cons: Barely any bass, “pathetic sounding” said Jay’s Reviews of the line generally. Gets distorted with a lot of bass. No true wireless stereo pairing between two units, unlike the Lifejacket 3. Only available used now.
Full Altec Lansing Lifejacket 2 review and specifications →
| Amplifier Power | 10W |
|---|---|
| Aux Input | Yes |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.6” x 4.2” x 4.6” (218 x 107 x 117 mm) |
| Drivers | 4.5” (114mm) woofer |
| IP Rating | IP67 |
| Omnidirectional | No |
| Power Bank | Yes |
| Power Input | Micro USB |
| Stereo | No |
| Strap | Yes (mounting clip) |
| TWS | No |
| Weight | 2.7 lbs (1.22 kg) |
- Reviews, Comparisons and Sound Samples
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