Short answer: the Minirig 4. It ranks #7 of 177 medium speakers by sound quality, rated 4.3/5, at $229.95; the Harman Kardon Luna ranks #26, rated 4.0/5, and costs $290.99, which makes this an easy call rather than a real tradeoff.
The Harman Kardon Luna is the tougher option. A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit. It is rated IP67 against Splash resistant for the Minirig 4. The tradeoff: Boosted bass, and less detailed than higher-ranked speakers.
The Minirig 4 is the longer-running, lighter choice. A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery. It is rated for 30 hours of battery against 12 for the Harman Kardon Luna. At 1.2 lbs (550 g) it weighs much less than the Harman Kardon Luna at 2.5 lbs (1.13 kg). It supports AAC Bluetooth, which the Harman Kardon Luna lacks. The catch: Calls itself splash resistant and has no official water rating.
Buy the Minirig 4. It is rated higher for sound quality than the Harman Kardon Luna and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A fully waterproof speaker with fairly balanced, bass rich sound, a separate tweeter, and stereo pairing with a second unit.
A small, long lasting speaker that gets loud and can add a matching subwoofer, with a 30 hour battery.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Harman Kardon Luna | Minirig 4 | |
|---|---|---|
| Price | $290.99 | $229.95 |
| Ranked | #26 of 177 in Medium Size Portable Bluetooth Speakers | #7 of 177 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 57Hz | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| EQ | No | Yes |
| IP Rating | IP67 | Splash resistant |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes (Bluetooth or cable) |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 1.2 lbs (550 g) |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 4” x 2.9” (101.6 x 73 mm) (diameter x height) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 70mm custom driver |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 60Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | 40W | 50W |
| Digital Aux Input | No | No |
| Aux Latency | - | 0ms |
| Bluetooth Latency | - | 60ms |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-C) |
| Built-in Microphone | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Minirig 4: