Short answer: the EarFun Uboom L for neutrality, the Harman Kardon Luna 2 for bass and midrange. The Uboom L ranks #2 of 172 and is the audiophile choice, extremely neutral and possibly the best of any modern Bluetooth speaker, though its latency is high at 400ms unless you engage the 66ms low latency mode. The Luna 2 offers an articulate, spacious midrange and tight bass from its 62mm x 82mm woofer.
The case for the EarFun Uboom L: Tuned by Oluv and he knocked it out of the park. The audiophile choice. Extremely neutral, possibly the best of any modern Bluetooth speaker slightly behind the Vifa Helsinki. The catch: Latency is high (400ms) without turning on low latency mode (66ms) which doesn’t work when two speakers are TWS paired. Low latency mode can be turned on by pressing the Bluetooth button twice.
Buy the EarFun Uboom L. It is rated higher for sound quality than the Harman Kardon Luna 2 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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
One of the strongest small-speaker values for music: reviews praise clear vocals, a natural overall balance and a genuinely convincing stereo image when two are paired.
Amazon $49.79 EarFun $79.99 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 | EarFun Uboom L | |
|---|---|---|
| Price | $199.95 | $49.79 after coupon UBOOMLWC |
| Ranked | #25 of 172 in Medium Size Portable Bluetooth Speakers | #2 of 172 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (firmware >= 1.2.6) |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| EQ | Yes (4 presets + custom) | Yes (10 band, firmware >= 1.2.6) |
| IP Rating | IP67 | IP67 |
| 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) | 1.4 lbs (650 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 55mm drivers + 2x passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 28W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Aux Latency | - | 216ms |
| Bass Extension (-10dB) | - | 56Hz |
| Built-in Microphone | - | Yes |
| Bluetooth Latency | - | 400ms normal / 66ms low latency mode |
| Maximum SPL | - | 103dB (measured by Alan Ross Reviews) |
| Party Mode | - | No |
| Power Bank | - | No |
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