Short answer: the Soundcore Motion X600 if sound quality matters most, the Harman Kardon Onyx Studio 4 if price matters most. The Soundcore Motion X600 ranks #19 of 77 large speakers at $150. The Harman Kardon Onyx Studio 4 ranks #47 at $100, $50 cheaper.
What the Soundcore Motion X600 offers: Firmware 4.2.9 is a big improvement in sound quality over previous releases. Try this Oluv EQ for the best sound quality Watch for: Stock frequency response is wavy. Use spatial mode for best sound quality. Need a different EQ for each volume step. Dip in the upper bass around 120hz. Rising frequency response, treble a little hot. Would be ranked around #20 without the Oluv EQ. Even with the Oluv EQ the bass isn’t very deep and the sound is still a little unnatural.
What the Harman Kardon Onyx Studio 4 offers: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Multi-host Bluetooth connectivity for 2 phones, daisy chaining up to 100 speakers. Elegant modern design with smooth curves and premium materials. Watch for: 8 hour battery at medium volume. Not at loud as others. Not as deep of bass as the newer Onyx. External AC power brick for charging.
Buy the Soundcore Motion X600 when sound quality outweighs the price for you, and the Harman Kardon Onyx Studio 4 when the price outweighs sound quality instead.
If water resistance matters to you, the Soundcore Motion X600 at IPX7 (brief submersion) holds up far better than the Harman Kardon Onyx Studio 4 at no water resistance.
Specifications Side By Side
| Soundcore Motion X600 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $150 | $100 Discontinued |
| Ranked | #19 of 77 in Large Size Portable Bluetooth Speakers | #47 of 77 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 52Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IPX7 | None |
| Bluetooth Latency | 83ms | - |
| Max Volume | 104dB | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 5.2 lbs / 2.35 kg | 4.5 lbs / 2.06 kg |
| App | No | Yes (HK Connect) |
| Bluetooth Codecs | SBC | SBC |
| Built in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | Yes (PartyCast up to 100 speakers) | Yes (Connect+ up to 100 speakers) |
| Bluetooth Version | 5.3 | 4.2 |
| Dimensions | 11.8" x 4.8" x 3.2" (300 x 121 x 81 mm) | 11.4" x 11.4" x 5.1" (290 x 290 x 130 mm) |
| Drivers | 2x 60mm woofers, 2x 27mm tweeters, 1x 50mm upward-firing driver | 2x 75mm woofers, 2x 20mm tweeters |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Output Power | 50W | 60W |
| Digital Aux Input | No | No |
| Discontinued | - | Yes |
Related Speaker Comparisons
A few more comparisons worth a look in the same class:
- Harman Kardon Citation 200 vs Soundcore Rave Neo 2
- Soundcore Rave Neo 2 vs W-King T9
- JBL Flip 7 vs Soundcore Rave Neo 2
- Tribit Stormbox Lava vs Soundcore Motion X600
- Sony SRS-XB43 vs Harman Kardon Onyx Studio 4
Prices on this page were last checked August 27, 2026 at 10:09 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
Soundcore Motion X600: $150 Amazon B&H Photo Video eBay
Pros: Firmware 4.2.9 is a big improvement in sound quality over previous releases. Try this Oluv EQ for the best sound quality
Cons: Stock frequency response is wavy. Use spatial mode for best sound quality. Need a different EQ for each volume step. Dip in the upper bass around 120hz. Rising frequency response, treble a little hot. Would be ranked around #20 without the Oluv EQ. Even with the Oluv EQ the bass isn’t very deep and the sound is still a little unnatural.
Full Soundcore Motion X600 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 83ms |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.8" x 4.8" x 3.2" (300 x 121 x 81 mm) |
| Drivers | 2x 60mm woofers, 2x 27mm tweeters, 1x 50mm upward-firing driver |
| EQ | No |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Max Volume | 104dB |
| Omnidirectional | No |
| Output Power | 50W |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.2 lbs / 2.35 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Motion X600 now tuned by Alan Ross (sort of) Not clickbait! More from alanrossreviews →
- Alan Ross Reviews: breaking news…..Soundcore Motion X600 with LDAC and spatial audio!
- Alan Ross Reviews: Spatial Audio: Soundcore Motion X600 Vs Tribit Stormbox Blast
- Alan Ross Reviews: Soundcore Motion x600 (best speaker ever) or two motion booms?
- Alan Ross Reviews: Craziest firmware update ever - Soundcore Motion X600 3.2.8/4.2.8 🤦♀️
- Oluv Patreon: SoundCore Motion X600 vs VIFA Helsinki More from Oluv’Sone →
- NeverEnoughTech: soundcore Motion X600 vs. Sonos Move vs. Bose Soundlink Revolve II
- Jay’s Straight Up Reviews & More: TREBLAB HD-360 (360° Sound) vs Soundcore Motion X600 (Spatial Sound)😮💨 Cornered in Basement Kitchen More from JaysStraightUpReviews →
- Reddit Search for Soundcore Motion X600 Review
- Head-to-Head Comparisons
- Soundcore Motion X600 vs Soundcore Rave Neo 2
- Soundcore Motion X600 vs JBL Xtreme 3
- Soundcore Motion X600 vs Bose SoundLink Max
- Soundcore Motion X600 vs Teufel Rockster Cross
- Soundcore Motion X600 vs Bose SoundLink Plus
- Soundcore Motion X600 vs B&O Beoplay A2 active
- Soundcore Motion X600 vs Soundcore Select Pro
- Soundcore Motion X600 vs Soundcore Motion X500
- See all 42 comparisons
Harman Kardon Onyx Studio 4: $100 Discontinued eBay
Pros: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Multi-host Bluetooth connectivity for 2 phones, daisy chaining up to 100 speakers. Elegant modern design with smooth curves and premium materials.
Cons: 8 hour battery at medium volume. Not at loud as others. Not as deep of bass as the newer Onyx. External AC power brick for charging. Discontinued.
Full Harman Kardon Onyx Studio 4 review and specifications →
| App | Yes (HK Connect) |
|---|---|
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.4" x 11.4" x 5.1" (290 x 290 x 130 mm) |
| Discontinued | Yes |
| Drivers | 2x 75mm woofers, 2x 20mm tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Output Power | 60W |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 4.5 lbs / 2.06 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Geri’s Collection: Harman Kardon Onyx 7 vs Onyx 4
- OCM Reviews: Onyx Studio 4 Vs Onyx Studio 5 - Sound Quality Comparison - Bluetooth Speaker
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers! More from alanrossreviews →
- Reddit Search for Harman Kardon Onyx Studio 4 Review
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 4 vs Zealot S97
- Harman Kardon Onyx Studio 4 vs JBL Xtreme 2
- Harman Kardon Onyx Studio 4 vs Tronsmart Halo 100
- Harman Kardon Onyx Studio 4 vs W-King D8
- Harman Kardon Onyx Studio 4 vs Sony SRS-XB43
- Harman Kardon Onyx Studio 4 vs JBL Xtreme
- Harman Kardon Onyx Studio 4 vs Doss Soundbox XL
- Harman Kardon Onyx Studio 4 vs Sony ULT Field 5
- See all 38 comparisons