Short answer: the Harman Kardon Luna 2 on measured sound quality, the Soundcore 3 on price. The Harman Kardon Luna 2 ranks #24 of 157 medium speakers, rated 4.1/5, at $199.95. The Soundcore 3 ranks #62, rated 3.4/5, at $59.99, $139.96 cheaper.
The Harman Kardon Luna 2 is the better-sounding choice. Articulate, spacious midrange with precise imaging and instrument separation. Watch for: Treble can sound bright and edgy, and it loses more output off-axis than some rivals.
The Soundcore 3 is the longer-running, lighter choice. Identical in acoustic design and performance to the retailer variant Soundcore Select 2. It is rated for 24 hours of battery against 12 for the Harman Kardon Luna 2. At 0.8 lbs (372 g) it weighs much less than the Harman Kardon Luna 2 at 1.6 lbs (735 g). It plays in stereo from a single unit, unlike the Harman Kardon Luna 2.
Buy the Harman Kardon Luna 2 when sound quality outweighs the price for you, and the Soundcore 3 when the price outweighs sound quality instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna 2 | Soundcore 3 | |
|---|---|---|
| Price | $199.95 | $59.99 |
| Ranked | #24 of 157 in Medium Size Portable Bluetooth Speakers | #62 of 157 in Medium 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 (inferred; additional codecs unverified) |
| 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) | 0.8 lbs (372 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) | 6.9” x 2.2” x 2.3” (174 x 57 x 59 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter | 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) | - |
| Amplifier Power | 40W (25W woofer + 15W tweeter) | 16W |
| Digital Aux Input | No | No |
| Strap | No | No |
| Bass Extension (-10dB) | - | 60Hz |
| Bluetooth Latency | - | 180ms |
| Maximum SPL | - | 99dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (PartyCast up to 100 speakers) |
Related Speaker Comparisons
More worthwhile head-to-heads for Harman Kardon Luna 2:
- Harman Kardon Luna 2 vs Earfun Uboom L
- Harman Kardon Luna 2 vs Soundcore Motion 300
- Harman Kardon Luna 2 vs Minirig 4
- Harman Kardon Luna 2 vs B&O Beosound A1 2nd gen
- Harman Kardon Luna 2 vs JBL Charge 6
Prices on this page were last checked October 2, 2026 at 10:18 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.
The Two Speakers In Full
Harman Kardon Luna 2: $199.95 Amazon B&H Photo Video eBay
Older model: the Harman Kardon Luna (ranked lower, rated 4/5).
Pros: Articulate, spacious midrange with precise imaging and instrument separation. Tight, well-controlled bass from the 62mm x 82mm woofer and passive radiator despite the compact body, and it stays cleaner at volume than pricier rivals like the Sonos Play. IP67 rated, and two units pair via AirTouch for true stereo sound.
Cons: Treble can sound bright and edgy, and it loses more output off-axis than some rivals. Some listeners hear mid-range rattling on certain tracks, similar to sibling JBL models. 12-hour battery life trails category leaders like the JBL Charge 6, which doubles it. Single unit is not stereo (1.1 driver layout).
Full Harman Kardon Luna 2 review and specifications →
| Amplifier Power | 40W (25W woofer + 15W tweeter) |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Digital Aux Input | No |
| Dimensions | 8.5” x 3.3” x 3.2” (216 x 84 x 81 mm) |
| Drivers | 62mm x 82mm woofer with passive radiator, 20mm tweeter |
| EQ | Yes (4 presets + custom) |
| Frequency Response | 58Hz - 20kHz (-6dB) (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 1.6 lbs (735 g) |
- Links
- Reviews, Comparisons and Sound Samples
- What Hi-Fi?: Harman Kardon Luna 2 review
- Joy & Oluv’Sone: Sonos Play & Harman Kardon Luna 2 - listening test More from Oluv’Sone →
- Mateusz Cholewa: Harman Kardon Luna 2 UNBOXING vs HK Luna Short Test More from Mateusz Cholewa →
- Storytripper HD: Harman Kardon Luna vs Luna 2 More from storytripperhd →
- Head-to-Head Comparisons
- Harman Kardon Luna 2 vs Harman Kardon Luna
- Harman Kardon Luna 2 vs Bogasing G4
- Harman Kardon Luna 2 vs JBL Charge 5 Wifi
- Harman Kardon Luna 2 vs JBL Charge 5
- Harman Kardon Luna 2 vs Xiaomi Sound Party
- Harman Kardon Luna 2 vs Soundcore Boom 3i
- Harman Kardon Luna 2 vs B&O Beosound A1 3rd gen
- Harman Kardon Luna 2 vs Cleer Audio Scene
- See all 122 comparisons
Soundcore 3: $59.99 Amazon eBay
Older model: the Soundcore 2 (ranked lower, rated 3/5).
Pros: Soundcore 3 uses 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators. Its 372 g, claimed 24 hours (Manufacturer specified) battery life, IPX7 protection, up to 99dB and stereo playback make it a practical option for its intended room or portable use. Identical in acoustic design and performance to the retailer variant Soundcore Select 2. Measured bass extension of 60Hz (-10dB).
Cons: Bass is limited by its 60Hz specification.
Full Soundcore 3 review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 60Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Latency | 180ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 6.9” x 2.2” x 2.3” (174 x 57 x 59 mm) |
| Drivers | 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators |
| EQ | Yes |
| IP Rating | IPX7 |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 0.8 lbs (372 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons