Short answer: the Harman Kardon Luna 2, unless you need the smallest option. The Tribit Stormbox Micro 2 is very neutral with much deeper bass than most speakers in its size, plus a built-in strap, but its phone charging is finicky and usually does not work. The Luna 2 brings the tighter, well-controlled bass from its 62mm x 82mm woofer and passive radiator, at $199.95 against $39.99.
Buy the Harman Kardon Luna 2 ($199.95) for a medium speaker; the Tribit Stormbox Micro 2 ($39.99) suits a small speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Articulate, spacious midrange with precise imaging and instrument separation.
Amazon $199.95 B&H Photo Video $199.95 eBay
A 317 g IP67 strap-mounted speaker with best in class, very neutral sound and much deeper bass than most speakers its size.
Amazon $39.99 AliExpress $34.19 eBayPrices on this page were last checked October 15, 2026 at 5:41 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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Specifications Side By Side
| Harman Kardon Luna 2 | Tribit Stormbox Micro 2 | |
|---|---|---|
| Price | $199.95 | $39.99 |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #1 of 61 in Small Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (4 presets + custom) | Yes (9 Band) |
| 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) | 0.7 lbs (317 g) |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 3.9” x 3.9” x 1.7” (99.1 x 99.1 x 42.7 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 48mm NdFeB driver |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 10W |
| Digital Aux Input | No | No |
| Strap | No | Yes (built-in strap) |
| Bass Extension (-10dB) | - | 65Hz |
| Built-in Microphone | - | Yes |
| Bluetooth Latency | - | 265ms |
| Maximum SPL | - | 94dB (measured by Alan Ross Reviews) |
| Party Mode | - | No |
| Power Bank | - | Yes (but it doesn’t usually work; USB-C, 10W) |
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