Short answer: the Harman Kardon Onyx Studio 4. It ranks #47 of 77 large speakers by sound quality at $100; the Soundcore Trance/Rave Mega ranks #73 and costs $249, so there is little reason to consider the other one.
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.
What the Soundcore Trance/Rave Mega offers: 80W power with 105dB output, BassUp technology for body-shaking bass. 20,000mAh battery for 24 hours claimed (18 hours for Trance variant). IPX7 waterproof with LED light show. USB port charges devices. Soundcore app with EQ customization, multipoint pairing, can link speakers for Party Mode. Watch for: Hugely recessed mids and treble
Buy the Harman Kardon Onyx Studio 4. It ranks higher for sound quality than the Soundcore Trance/Rave Mega and costs less, so the other one has nothing left to offer.
If sound quality matters at all to you, skip the Soundcore Trance/Rave Mega. It ranks near the bottom of the 77 large speakers, so look higher up the list instead.
There is a real battery-life gap here: the Soundcore Trance/Rave Mega is rated for 18 hours, the Harman Kardon Onyx Studio 4 only 8 hours.
If water resistance matters to you, the Soundcore Trance/Rave Mega at IPX7 (brief submersion) holds up far better than the Harman Kardon Onyx Studio 4 at no water resistance.
Specifications Side By Side
| Harman Kardon Onyx Studio 4 | Soundcore Trance/Rave Mega | |
|---|---|---|
| Price | $100 Discontinued | $249 Discontinued |
| Ranked | #47 of 77 in Large Size Portable Bluetooth Speakers | #73 of 77 in Large Size Portable Bluetooth Speakers |
| App | Yes (HK Connect) | No |
| Aux Input | Yes | Yes |
| Battery Life | 8 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | None | IPX7 |
| Party Mode | Yes (Connect+ up to 100 speakers) | No |
| Power Bank | No | Yes |
| TWS | Yes | Yes |
| Weight | 4.5 lbs / 2.06 kg | 7.7 lbs / 3.5 kg |
| Bluetooth Codecs | SBC | SBC |
| Built in Microphone | Yes | Yes |
| Power Input | DC Barrel Connector (19V/2.1A) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 4.2 | 5.0 |
| Drivers | 2x 75mm woofers, 2x 20mm tweeters | 1x 133mm woofer, 1x 51mm tweeter |
| Dimensions | 11.4" x 11.4" x 5.1" (290 x 290 x 130 mm) | 7" x 7" x 13.3" (179 x 177 x 339 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Output Power | 60W | 80W |
| Discontinued | Yes | Yes |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 63Hz |
| Max Volume | - | 97dB |
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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
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
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Soundcore Trance/Rave Mega: $249 Discontinued eBay
Pros: 80W power with 105dB output, BassUp technology for body-shaking bass. 20,000mAh battery for 24 hours claimed (18 hours for Trance variant). IPX7 waterproof with LED light show. USB port charges devices. Soundcore app with EQ customization, multipoint pairing, can link speakers for Party Mode.
Cons: Hugely recessed mids and treble. Discontinued.
Full Soundcore Trance/Rave Mega review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7" x 7" x 13.3" (179 x 177 x 339 mm) |
| Discontinued | Yes |
| Drivers | 1x 133mm woofer, 1x 51mm tweeter |
| EQ | No |
| IP Rating | IPX7 |
| Max Volume | 97dB |
| Omnidirectional | No |
| Output Power | 80W |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 7.7 lbs / 3.5 kg |
- Reviews, Comparisons and Sound Samples
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