Short answer: the Harman Kardon Luna 2 for better sound quality, the Bogasing G4 for the lower price. The Harman Kardon Luna 2 ranks #25 of 177 medium speakers, rated 4.1/5, at $199.95. The Bogasing G4 ranks #27, rated 4.0/5, at $42.49, $157.46 cheaper.
The case for the Harman Kardon Luna 2: A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit. It has an adjustable EQ, which the Bogasing G4 lacks. The catch: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Bogasing G4 is the longer-running choice. A light, affordable waterproof speaker with surprisingly strong bass for its size, solid loudness, long battery life and stereo pairing. It is rated for 24 hours of battery against 12 for the Harman Kardon Luna 2. It keeps a wired aux input, which the Harman Kardon Luna 2 lacks. It plays in stereo from a single unit, unlike the Harman Kardon Luna 2. The tradeoff: The upper treble is boosted and uneven, while the mids sit slightly behind the bass and highs, so it is not a neutral choice for vocal-focused music.
Buy the Harman Kardon Luna 2 if sound quality is the priority over the price, or the Bogasing G4 if the price is the priority over sound quality.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A stylish waterproof speaker with clear, spacious mids, tight bass that stays clean at volume, and stereo pairing with a second unit.
A light, affordable waterproof speaker with surprisingly strong bass for its size, solid loudness, long battery life and stereo pairing.
Prices on this page were last checked October 31, 2026 at 7:11 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 | Bogasing G4 | |
|---|---|---|
| Price | $199.95 | $42.49 |
| Ranked | #25 of 177 in Medium Size Portable Bluetooth Speakers | #27 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | LE Audio with LC3 |
| EQ | Yes (4 presets + custom) | No |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | Yes |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | No | - |
| Weight | 1.6 lbs (735 g) | 1.8 lbs (0.83 kg) |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 8.9”H x 2.5”W x 3.4”D (225 x 64 x 86 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | Two drivers and passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 50W |
| Digital Aux Input | No | No |
| Strap | No | - |
| Aux Latency | - | 16ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 90ms |
| Maximum SPL | - | 100dB (measured by Alan Ross Reviews) |
| Party Mode | - | No |
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