Short answer: the Harman Kardon Luna 2 for consistency at any level, the Soundcore Boom 2 for cheap deep bass. The Boom 2 has pretty deep bass for its size and lights in its passive radiators, but a single midrange driver means stereo only from the tweeters, and its bass notes disappear at low levels. The Luna 2 costs $199.95 against $99.99 and keeps its composure at volume, though its treble can be bright and edgy.
Buy the Harman Kardon Luna 2 at $199.95 if you want a medium speaker. Buy the Soundcore Boom 2 at $99.99 if you want a large speaker instead.
There is a real battery-life gap here: the Soundcore Boom 2 is rated for 24 hours, the Harman Kardon Luna 2 only 12 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Articulate, spacious midrange with precise imaging and instrument separation.
Amazon $199.95 B&H Photo Video $199.95 eBay
A 1.68 kg IPX7 waterproof speaker with pretty deep bass for its size (47Hz at -10dB), 105dB maximum SPL and 24-hour battery life.
Amazon $99.99 Lowest B&H Photo Video Soundcore $139.99 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 | Soundcore Boom 2 | |
|---|---|---|
| Price | $199.95 | $99.99 |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #10 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 | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 3.7 lbs (1.68 kg) |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 11.7” x 7.3” x 4” (297 x 185 x 102 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 120mm x 90mm woofer, 2x 20mm tweeters |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | 45Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 80W |
| Digital Aux Input | No | No |
| Strap | No | No |
| Bass Extension (-10dB) | - | 47Hz |
| Built-in Microphone | - | No |
| Bluetooth Latency | - | 125ms |
| Maximum SPL | - | 105dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (PartyCast 2.0 up to 100 speakers) |
| Power Bank | - | Yes (USB-A) |
| Lights | - | Yes |
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