Short answer: the Vifa Helsinki for midrange and treble, the Harman Kardon Luna 2 for practicality. The Helsinki is generally regarded as having the best midrange and treble of any battery powered Bluetooth speaker, but it has no TWS pairing and needs a hacked Android-only Vifa app for night mode to sound good. The Luna 2 costs $199.95 against $449 and adds tight, well-controlled bass and precise imaging.
Buy the Harman Kardon Luna 2 at $199.95 for a medium speaker, or the Vifa Helsinki at $449 for a large speaker instead.
If water resistance matters to you, the Harman Kardon Luna 2 at IP67 (brief submersion) holds up far better than the Vifa Helsinki at no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Articulate, spacious midrange with precise imaging and instrument separation.
Amazon $199.95 B&H Photo Video $199.95 eBay
Generally regarded as the best midrange and treble sound quality of any battery powered Bluetooth speaker.
Amazon $449.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 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 | Vifa Helsinki | |
|---|---|---|
| Price | $199.95 | $449.00 Discontinued |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #1 of 105 in Large Size Portable Bluetooth Speakers |
| App | Yes | No (official app is broken, 3rd party android app only) |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | aptX, SBC |
| EQ | Yes (4 presets + custom) | No |
| IP Rating | IP67 | None |
| MicroSD Playback | No | - |
| Power Input | USB-C | AC Power brick |
| Stereo | No | Partially (shared woofer) |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 3.1 lbs (1.4 kg) |
| Bluetooth Version | 5.4 | 4.1 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 6.1” x 8.3” x 2.8” (156 x 210 x 70 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 50mm fullrange, 2x 66mm woofers + 2x passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 58Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 50W |
| Digital Aux Input | No | No |
| Strap | No | Yes (built-in strap) |
| Bass Extension (-10dB) | - | 48Hz |
| Party Mode | - | No |
| Built-in Microphone | - | Yes |
| Power Bank | - | No |
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