Short answer: the Brane X for bass depth, the Harman Kardon Luna 2 for everything else. The Brane X reaches the absolute deepest bass in the category and its medium bass boost is the most balanced setting, but it boosts upper bass around 120Hz, rolls off treble, has poor real-world battery life, a high price and a lot of aux input latency. The Luna 2 counters with an articulate, spacious midrange and tight bass from its 62mm x 82mm woofer.
Buy the Harman Kardon Luna 2 ($199.95) for a medium speaker; the Brane X ($549) suits a large speaker instead.
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
The Brane X pairs a dedicated RAD subwoofer with two midrange drivers and two tweeters to achieve extraordinary low bass for a 3.5kg portable: its measured -10dB extension is 31Hz.
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Specifications Side By Side
| Harman Kardon Luna 2 | Brane X | |
|---|---|---|
| Price | $199.95 | $549.00 |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #4 of 105 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | aptX HD, aptX, AAC, SBC |
| EQ | Yes (4 presets + custom) | No |
| IP Rating | IP67 | IP57 |
| MicroSD Playback | No | - |
| Power Input | USB-C | AC Power brick |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 7.7 lbs (3.5 kg) |
| Bluetooth Version | 5.4 | 5.1 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 9.3” x 7” x 6.1” (236 x 178 x 155 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 2.5” midrange, 2x 0.75” tweeters + 6.5”x9” subwoofer |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 30Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 200W |
| Digital Aux Input | No | No |
| Strap | No | No |
| Aux Latency | - | 295ms default, 33ms with aux pass-through |
| Bass Extension (-10dB) | - | 31Hz |
| Bluetooth Latency | - | 100ms |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Brane app, up to 8 speakers) |
| Wi-Fi | - | Yes |
| Built-in Microphone | - | Yes |
| Voice Assistants | - | Amazon Alexa |
| Power Bank | - | No |
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