Short answer: the Brane X if bass depth matters most. It has the absolute deepest bass in this category, though boosted upper bass around 120Hz and a rolled-off treble leave it missing detail up top. The Harman Kardon Onyx Studio 5 answers with an elegant circular design and a carrying handle, but its own warm sound is also bass-boosted.
The case for the Brane X: Very deep bass, the absolute deepest from this category. The catch: Boosted upper bass ~120Hz, rolled off treble, so it’s missing detail up top.
What the Harman Kardon Onyx Studio 5 gets right: Elegant circular design with carrying handle. The catch: Warm sound with boosted bass.
Buy the Brane X ($500) for a large speaker; the Harman Kardon Onyx Studio 5 ($499.99) suits a boombox speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Brane X | Harman Kardon Onyx Studio 5 | |
|---|---|---|
| Price | $500 | $499.99 |
| Ranked | #4 of 78 in Large Size Portable Bluetooth Speakers | #21 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 295ms default, 33ms with aux pass-through | - |
| Bass Extension (-10dB) | 31Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX HD, aptX, AAC, SBC | SBC |
| IP Rating | IP57 | IPX7 |
| Bluetooth Latency | 100ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Brane app, up to 8 speakers) | Yes (Wireless Dual Sound) |
| Power Input | AC Power brick | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) |
| Weight | 7.7 lbs (3.5 kg) | 6.6 lbs (3 kg) |
| Wi-Fi | Yes | - |
| App | No | No |
| Built-in Microphone | Yes | Yes |
| Voice Assistants | Amazon Alexa | - |
| EQ | No | No |
| Power Bank | No | No |
| Dimensions | 9.3" x 7" x 6.1" (236 x 178 x 155 mm) | 11.3" x 11.3" (285.8 x 285.8 mm) |
| Drivers | 2x 2.5" midrange, 2x 0.75" tweeters + 6.5"x9" subwoofer | 120mm woofer + 25mm tweeter + 2x passive radiators |
| Frequency Response | 30Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 200W | 50W |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.1 | 4.2 |
| USB Playback | - | No |
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Prices on this page were last checked September 23, 2026 at 11:24 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
Brane X: $500 Amazon eBay
Pros: The Brane X pairs a dedicated RAD subwoofer with two midrange drivers and two tweeters to achieve extraordinary low bass for a 3.5kg portable: its measured -10dB extension is 31Hz. Independent testing finds it loud, with well-balanced mids, a smooth treble balance and useful bass-level controls; Wi-Fi, AirPlay, Alexa, quality Bluetooth codecs and low-latency aux pass-through make it unusually versatile. Measured bass extension of 31Hz (-10dB).
Cons: The front-facing design has only moderate dispersion, so sound changes noticeably off to the sides or behind it. Bass response shifts at maximum volume, the default aux mode has very high latency, and some listeners find the upper register edgy or need EQ to achieve their preferred balance. Its claimed 12-hour runtime and premium cost make it more of a compact high-end system than a carefree all-day speaker.
Full Brane X review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 295ms default, 33ms with aux pass-through |
| Bass Extension (-10dB) | 31Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX HD, aptX, AAC, SBC |
| Bluetooth Latency | 100ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.3" x 7" x 6.1" (236 x 178 x 155 mm) |
| Drivers | 2x 2.5" midrange, 2x 0.75" tweeters + 6.5"x9" subwoofer |
| EQ | No |
| Frequency Response | 30Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP57 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Brane app, up to 8 speakers) |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | Yes |
| Voice Assistants | Amazon Alexa |
| Weight | 7.7 lbs (3.5 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: This speaker left me shocked! Brane X, they said it defies the laws of physics! More from alanrossreviews →
- Alan Ross Reviews: Brane X vs JBL Xtreme 5: Maximum Bass, No Mercy
- Alan Ross Reviews: JBL Boombox 4 HUMILIATES Brane X?! Ultimate Bass Battle!
- Alan Ross Reviews: Minirig 2.1 or the Brane X or the Harman Kardon Go Play 3?
- mark: Brane X Speaker Review 2
- mark: Brane X Speaker Review
- Head-to-Head Comparisons
Harman Kardon Onyx Studio 5: $499.99 Amazon eBay
Pros: The iconic circular cabinet and integrated handle make it an attractive room-to-room speaker. Reviews praise its generous bass, balanced mids and smooth top end at moderate levels, giving it a warm, relaxed presentation for casual indoor music.
Cons: The large bass boost can mask lower-mid detail and make dense mixes muddy. Battery life is only around eight hours at moderate volume, it is not especially loud, and it has no water resistance for outdoor use.
Full Harman Kardon Onyx Studio 5 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No |
| 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 | 11.3" x 11.3" (285.8 x 285.8 mm) |
| Drivers | 120mm woofer + 25mm tweeter + 2x passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Partially (1 woofer) |
| 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 | 6.6 lbs (3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- Harman Kardon Onyx Studio 5 vs Tribit Stormbox Blast 2
- Harman Kardon Onyx Studio 5 vs Zealot S89
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