Short answer: the Soundcore Motion X600. It ranks #19 of 105 large speakers by sound quality (rated 4.3/5) at $159.99 and is still sold new; the Harman Kardon Onyx Studio 4 ranks #67 (rated 3.3/5) and is discontinued, so it is only an option used. The Harman Kardon Onyx Studio 4’s replacement, the Harman Kardon Onyx Studio 9, is still sold new.
The Soundcore Motion X600 is the better-sounding, longer-running option. Firmware 4.2.9 is a big improvement in sound quality over previous releases. It is rated for 12 hours of battery against 8 for the Harman Kardon Onyx Studio 4. It is rated IPX7, while the Harman Kardon Onyx Studio 4 has no water resistance. It supports LDAC Bluetooth, which the Harman Kardon Onyx Studio 4 lacks. Watch for: Stock frequency response is wavy.
The case for the Harman Kardon Onyx Studio 4: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Watch for: 8 hour battery at medium volume.
Buy the Soundcore Motion X600. It is rated higher for sound quality and still sold new, while the Harman Kardon Onyx Studio 4 is discontinued.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Soundcore Motion X600 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $159.99 | $100 Discontinued |
| Ranked | #19 of 105 in Large Size Portable Bluetooth Speakers | #67 of 105 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 | - |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) | - |
| 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 | Yes | Yes |
| Bluetooth Codecs | LDAC, 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 + 1x passive radiator |
| Frequency Response | 50Hz - 40kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 50W | 60W |
| Digital Aux Input | No | No |
| Strap | No | No |
Related Speaker Comparisons
How Soundcore Motion X600 compares with other leading options:
- Soundcore Motion X600 vs Vifa Helsinki
- JBL Xtreme 5 vs Soundcore Motion X600
- Tribit Stormbox Lava vs Soundcore Motion X600
- Soundcore Motion X600 vs Brane X
- Soundcore Motion X600 vs Minirig 4 with subwoofer
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Soundcore Motion X600: $159.99 Amazon $159.99 B&H Photo Video eBay
Same family: the Soundcore Motion 100 (smaller model, rated 3.7/5), the Soundcore Motion 300 (smaller model, rated 4.5/5) and the Soundcore Motion X500 (smaller model, ranked lower, rated 4.1/5). See every Soundcore Motion generation.
Pros: Firmware 4.2.9 is a big improvement in sound quality over previous releases. Try this Oluv EQ for the best sound quality. Measured bass extension of 52Hz (-10dB).
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 →
| Released | May 2023 (3 years ago) |
|---|---|
| Amplifier Power | 50W |
| App | No |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | LDAC, 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 |
| Maximum SPL | 104dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 5.2 lbs (2.35 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: SoundCore Motion X600 vs VIFA Helsinki More from Oluv’Sone →
- 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: Craziest firmware update ever - Soundcore Motion X600 3.2.8/4.2.8 🤦♀️
- 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: Longest I have ever been, and I don’t care who sees it! ❤
- Mateusz Cholewa: BOGASING S8 Pro MAX KILLER? vs Soundcore Motion X600 More from Mateusz Cholewa →
- Jay’s Straight Up Reviews & More: TREBLAB HD-360 (360° Sound) vs Soundcore Motion X600 (Spatial Sound)😮💨 Cornered in Basement Kitchen More from JaysStraightUpReviews →
- NeverEnoughTech: soundcore Motion X600 vs. Sonos Move vs. Bose Soundlink Revolve II
- Head-to-Head Comparisons
- Soundcore Motion X600 vs JBL Xtreme 3
- Soundcore Motion X600 vs Loewe We. Hear Pro
- Soundcore Motion X600 vs Soundcore Rave Neo 2
- Soundcore Motion X600 vs Bose SoundLink Max
- Soundcore Motion X600 vs B&O Beoplay A2 active
- Soundcore Motion X600 vs Soundcore Select Pro
- Soundcore Motion X600 vs Teufel Rockster Cross
- Soundcore Motion X600 vs Soundcore Motion Boom
- See all 64 comparisons
Harman Kardon Onyx Studio 4: $100 Discontinued eBay
Newer model: the Harman Kardon Onyx Studio 9, rated 4.1/5, released Dec 2024. See every Harman Kardon Onyx Studio generation.
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 →
| Released | Aug 2017 (9 years ago) |
|---|---|
| Amplifier Power | 60W |
| App | Yes (HK Connect) |
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 4.5 lbs (2.06 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 4 vs Tronsmart Halo 100
- Harman Kardon Onyx Studio 4 vs Zealot S97
- Harman Kardon Onyx Studio 4 vs JBL Xtreme
- Harman Kardon Onyx Studio 4 vs JBL Xtreme 2
- Harman Kardon Onyx Studio 4 vs DOSS Soundbox XL
- Harman Kardon Onyx Studio 4 vs Klipsch Detroit
- Harman Kardon Onyx Studio 4 vs Sony SRS-XG300
- Harman Kardon Onyx Studio 4 vs W-King D8
- See all 47 comparisons