Short answer: the Harman Kardon Luna 2 for detail, the Soundcore Motion Boom for budget loudness. The Motion Boom claims 30W of bass-heavy sound and a 10,000mAh battery for 24 hours, with a waterproof buoyant body and a carry handle, but it is not as neutral or detailed as top ranked speakers. The Luna 2 is the more articulate of the two and controls its bass better at volume, at $199.95 versus $109.99. The Soundcore Motion Boom is discontinued; its replacement is the Soundcore Boom 2.
The Soundcore Motion Boom is the longer-running choice. 30W loud bass-heavy sound, excellent budget-friendly value. It is rated for 24 hours of battery against 12 for the Harman Kardon Luna 2. It plays in stereo from a single unit, unlike the Harman Kardon Luna 2. The tradeoff: Not as neutral or detailed as other top ranked speakers.
Buy the Harman Kardon Luna 2 ($199.95) for a medium speaker; the Soundcore Motion Boom ($109.99) 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
30W loud bass-heavy sound, excellent budget-friendly value.
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Specifications Side By Side
| Harman Kardon Luna 2 | Soundcore Motion Boom | |
|---|---|---|
| Price | $199.95 | $109.99 Discontinued |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #14 of 105 in Large 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 |
| EQ | Yes (4 presets + custom) | Yes |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 3.3 lbs (1.5 kg) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 13.6” x 7.9” x 5.8” (346 x 200 x 148 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 63.5mm titanium fullrange drivers + 2x passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 30W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Bass Extension (-10dB) | - | 53Hz |
| Bluetooth Latency | - | 170ms |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| Party Mode | - | No |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | Yes |
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