Short answer: the JBL Boombox 3 Wifi for maximum loudness, the Harman Kardon Onyx Studio 6 for price. The Boombox 3 Wifi is the loudest speaker in the category, though its bass is boosted. The Onyx Studio 6 shares that warm, boosted-bass character and runs 8 hours at medium volume, but it costs $130 against $389.95.
Buy the JBL Boombox 3 Wifi if you want one new; the Harman Kardon Onyx Studio 6 is discontinued, so only look for it used.
There is a real battery-life gap here: the JBL Boombox 3 Wifi is rated for 24 hours, the Harman Kardon Onyx Studio 6 only 8 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 6 | JBL Boombox 3 Wifi | |
|---|---|---|
| Price | $130 Discontinued | $389.95 |
| Ranked | #13 of 90 in Boombox Size Portable Bluetooth Speakers | #26 of 90 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 37Hz | 43Hz |
| Battery Life | 8 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| IP Rating | IPX7 | IP67 |
| Bluetooth Latency | 180ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 111dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Wireless Dual Sound) | No |
| Power Input | DC Barrel Connector (19V/2A) | AC Power cable |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) | Yes |
| Weight | 6.5 lbs (2.94 kg) | 14.6 lbs (6.6 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| Power Bank | No | Yes (USB-A, 5V/2A) |
| USB Playback | No | No |
| Bluetooth Version | 4.2 | 5.3 |
| Amplifier Power | 50W RMS | 200W AC / 140W battery |
| Dimensions | 5” x 11.5” x 11.2” (128 x 291 x 284 mm) | 19.1” x 10.1” x 7.9” (484 x 256 x 200 mm) |
| Drivers | 1x 120mm (4.7”) woofer + 1x 25mm (1”) tweeter + 1x passive radiator | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| Digital Aux Input | No | No |
| Strap | No | No |
| Wi-Fi | - | Yes |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 6 compares with other leading options:
- Tribit Stormbox Blast vs Harman Kardon Onyx Studio 6
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 6
- JBL Partybox Encore vs Harman Kardon Onyx Studio 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.
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The Two Speakers In Full
Harman Kardon Onyx Studio 6: $130 Discontinued Amazon eBay
Newer model: the Harman Kardon Onyx Studio 9, ranked lower, rated 4.1/5.
Pros: Harman Kardon Onyx Studio 6 uses a 120mm woofer, 25mm tweeter and passive radiator. Its 2.94 kg, claimed 8 hours (Manufacturer specified) battery life, IPX7 protection, aux input and up to 96dB make it a practical option for its intended room or portable use. Measured bass extension of 37Hz (-10dB).
Cons: Bass is limited by its 37Hz specification. There is no companion app. No EQ adjustment. Warm tuning with boosted bass, and not as loud as others. Discontinued.
Full Harman Kardon Onyx Studio 6 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 37Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 180ms |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 5” x 11.5” x 11.2” (128 x 291 x 284 mm) |
| Drivers | 1x 120mm (4.7”) woofer + 1x 25mm (1”) tweeter + 1x passive radiator |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2A) |
| Stereo | No |
| Strap | No |
| TWS | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) |
| USB Playback | No |
| Weight | 6.5 lbs (2.94 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Onyx Studio 7 vs Onyx Studio 6 - massive deep bass battle 😁 More from alanrossreviews →
- That Speaker Guy: Harman Kardon Onyx Studio 6 vs Devialet Mania
- Ezekielo: Citation 200 vs Onyx Studio 6 vs Bose Portable Speaker Sound Comparison
- Alan Ross Reviews: Harman Kardon Go+ Play 2 mini or Onyx Studio 6 - best speaker for bass?
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
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JBL Boombox 3 Wifi: $389.95 Amazon eBay
Pros: Loudest speaker in the category. Slightly better frequency response than the non-wifi version. Measured bass extension of 43Hz (-10dB).
Cons: Bass boosted. Dip at 160Hz
Full JBL Boombox 3 Wifi review and specifications →
| Amplifier Power | 200W AC / 140W battery |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 43Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.1” x 10.1” x 7.9” (484 x 256 x 200 mm) |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V/2A) |
| Power Input | AC Power cable |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 14.6 lbs (6.6 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Dominik Reviews: JBL Partybox Encore 2 vs JBL Boombox 3 WiFi - Sound Test - Wide vs Narrow Soundstage! More from Dominik Reviews →
- Mateusz Cholewa: JBL Encore 2 Partybox Deep Bass 🆚 Jbl Boombox 3 WiFi 🎶 More from Mateusz Cholewa →
- Alan Ross Reviews: Not quite! JBL Authentics 300 review and sound test vs Boombox 3, Encore and Stormbox Blast More from alanrossreviews →
- Alan Ross Reviews: WiFi Edition: JBL Boombox 3 ultimate review! vs Boombox 3 Bluetooth edition
- Mateusz Cholewa: Soundcore Rave 3🧐 🆚 Jbl Boombox 3 WiFi
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