Short answer: the Harman Kardon Luna. It ranks #26 of 175 medium speakers by sound quality, rated 4.0/5, at $290.99. The Sony ULT Field 1 ranks #100, rated 3.1/5, at $138, $152.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Harman Kardon Luna is the better-sounding choice. The sound is fairly balanced apart from the boosted bass. Watch for: Boosted bass, and less detailed than higher-ranked speakers.
The Sony ULT Field 1 is the lighter option. IP67 rated, survives drops and 1m submersion. At 1.4 lbs (650 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. It has an adjustable EQ, which the Harman Kardon Luna lacks. The catch: Upper midrange peak, rolled off treble.
Buy the Harman Kardon Luna. It is rated higher for sound quality, and saving $152.99 with the Sony ULT Field 1 does not make up for the sound-quality gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna | Sony ULT Field 1 | |
|---|---|---|
| Price | $290.99 | $138.00 |
| Ranked | #26 of 175 in Medium Size Portable Bluetooth Speakers | #100 of 175 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 57Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| EQ | No | Yes |
| IP Rating | IP67 | IP67 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 1.4 lbs (650 g) |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 40W | - |
| Digital Aux Input | No | No |
| Built-in Microphone | - | Yes |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | No |
| Strap | - | Yes (detachable strap) |
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- Soundcore Boost “upgraded” 2021 vs Harman Kardon Luna
- Harman Kardon Luna vs Minirig 4
Prices on this page were last checked October 12, 2026 at 4:13 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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The Two Speakers In Full
Harman Kardon Luna: $290.99 Amazon $290.99 eBay
Newer model: the Harman Kardon Luna 2, ranked higher, rated 4.1/5, released Mar 2026. It adds app control and adjustable EQ. See every Harman Kardon Luna generation.
Pros: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Its 1.13 kg, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. The sound is fairly balanced apart from the boosted bass. Measured bass extension of 57Hz (-10dB).
Cons: Bass is limited by its 57Hz specification. There is no companion app. No EQ adjustment. Boosted bass, and less detailed than higher-ranked speakers.
Full Harman Kardon Luna review and specifications →
| Released | Sep 2023 (3 years ago) |
|---|---|
| Amplifier Power | 40W |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 57Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 2.5 lbs (1.13 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Harman Kardon Luna - sound demo More from Oluv’Sone →
- Alan Ross - The Anti Shill!: Onyx Studio 9 or Go Play 3? Or even the HK Luna?? More from alanrossreviews →
- Alan Ross Reviews: Beats Pill vs Harman Luna vs Bose Flex vs Soundcore Motion Plus
- 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 →
- Storytripper HD: Klipsch Nashville vs Harman Kardon Luna vs Soundcore Motion 300
- Storytripper HD: Huawei Sound Joy 2 vs Tribit XSound Plus 2 vs Harman Kardon Luna
- Head-to-Head Comparisons
- Harman Kardon Luna vs Harman Kardon Luna 2
- Harman Kardon Luna vs Bogasing G4
- Harman Kardon Luna vs Bogasing M4
- Harman Kardon Luna vs Tribit Maxsound Plus
- Harman Kardon Luna vs JBL Charge 5 Wifi
- Harman Kardon Luna vs JBL Charge 5
- Harman Kardon Luna vs Tribit Xsound Mega
- Harman Kardon Luna vs Soundcore Boom 3i
- See all 136 comparisons
Sony ULT Field 1: $138.00 Amazon $138.00 eBay
Older models: the Sony XB23 (ranked higher, rated 3.3/5), the Sony SRS-XB20 (ranked lower, rated 2.8/5), the Sony SRS-XB21 (ranked lower, rated 2.7/5) and the Sony SRS-XE200 (ranked lower, rated 2.5/5). See every Sony XB and ULT generation.
Same family: the Sony ULT Field 7 (larger model, rated 3.2/5), the Sony ULT Tower 10 (larger model, rated 3.9/5), the Sony ULT Field 3 (larger model, ranked higher, rated 3.4/5), the Sony ULT Field 5 (larger model, rated 3.5/5), the Sony ULT Tower 5 (larger model, rated 4.5/5), the Sony ULT Tower 7 (larger model, rated 4.7/5), the Sony ULT Tower 9 (larger model, rated 4.2/5) and the Sony ULT Tower Max (larger model, rated 4.8/5).
Pros: IP67 rated, survives drops and 1m submersion. Real-world battery around 28+ hours with ULT (bass boost) mode off. Stereo-pairs with a second ULT Field 1.
Cons: Upper midrange peak, rolled off treble
Full Sony ULT Field 1 review and specifications →
| Released | Apr 2024 (2 years ago) |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| Weight | 1.4 lbs (650 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Techder Audios: Sony ULT Field 1 VS Teufel Rockster Go 2 “CLOSE CALL?” More from techderaudios →
- Jay’s Straight Up Reviews & More: Ultimate Ears MegaBoom 4 vs Sony ULT Field 1 😧 $200 vs $128 Cylinder Bluetooth Speaker Matchup More from JaysStraightUpReviews →
- Storytripper HD: Huawei Soundjoy 2 vs Edifier ES60 vs Sony ULT Field 1 More from storytripperhd →
- New Stuff TV 2: Sony ULT Field 1 vs JBL Flip 6, JBL Charge 5 & Soundcore Motion 300 More from NewStuffTV1 →
- Head-to-Head Comparisons
- Sony ULT Field 1 vs JBL Grip
- Sony ULT Field 1 vs Treblab HD77
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