Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Harman Kardon Citation 200 ranks #13 of 103 large speakers by sound quality at $130; the Harman Kardon Onyx Studio 6 ranks #13 of 91 boombox speakers by sound quality at $130. The Harman Kardon Onyx Studio 6 is discontinued; its replacement is the Harman Kardon Onyx Studio 9.
What the Harman Kardon Citation 200 does well: Deeper bass than any Onyx. The catch: Overly boomy by default, you can short press the Bluetooth and volume down buttons simultaneously to decrease the bass, and the Bluetooth and volume up buttons simultaneously to increase it.
The Harman Kardon Onyx Studio 6 is the tougher option. Harman Kardon Onyx Studio 6 uses a 120mm woofer, 25mm tweeter and passive radiator. It is rated IPX7 against IPX4 for the Harman Kardon Citation 200. It keeps a wired aux input, which the Harman Kardon Citation 200 lacks. It links with other speakers (Wireless Dual Sound), which the Harman Kardon Citation 200 cannot. The catch: Warm tuning with boosted bass, and not as loud as others.
One note: the Harman Kardon Citation 200 is no longer sold new, but at #13 of 103 large speakers by sound quality it still outranks most current models, so used is worth considering.
Buy the Harman Kardon Citation 200 at $130 for a large speaker, or the Harman Kardon Onyx Studio 6 at $130 for a boombox speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Harman Kardon Citation 200 | Harman Kardon Onyx Studio 6 | |
|---|---|---|
| Price | $130 Discontinued | $130 Discontinued |
| Ranked | #13 of 103 in Large Size Portable Bluetooth Speakers | #13 of 91 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | No | Yes |
| Battery Life | 8 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IPX4 | IPX7 |
| Stereo | Partially (1 woofer) | No |
| Omnidirectional | No | No |
| Weight | 6.3 lbs (2.85 kg) | 6.5 lbs (2.94 kg) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | Yes (Harman Kardon app) | No |
| EQ | No | No |
| TWS | No | Yes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/) |
| Party Mode | No | Yes (Wireless Dual Sound) |
| Power Bank | No | No |
| USB Playback | No | No |
| Built-in Microphone | Yes | Yes |
| Voice Assistants | Google Assistant | - |
| Power Input | USB-C | DC Barrel Connector (19V/2A) |
| Bluetooth Version | 4.2 | 4.2 |
| Dimensions | 7” x 8.6” x 6.8” (178 x 219 x 172 mm) | 5” x 11.5” x 11.2” (128 x 291 x 284 mm) |
| Drivers | 5” woofer, 1” tweeter | 1x 120mm (4.7”) woofer + 1x 25mm (1”) tweeter + 1x passive radiator |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 50W | 50W RMS |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 37Hz |
| Bluetooth Latency | - | 180ms |
| Maximum SPL | - | 96dB (measured by Alan Ross Reviews) |
| Strap | - | No |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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Prices on this page were last checked October 10, 2026 at 5:37 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 Citation 200: $130 Discontinued eBay
Pros: Deeper bass than any Onyx.
Cons: Overly boomy by default, you can short press the Bluetooth and volume down buttons simultaneously to decrease the bass, and the Bluetooth and volume up buttons simultaneously to increase it. Discontinued.
Full Harman Kardon Citation 200 review and specifications →
| Released | Sep 2020 (6 years ago) |
|---|---|
| Amplifier Power | 50W |
| App | Yes (Harman Kardon app) |
| Aux Input | No |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7” x 8.6” x 6.8” (178 x 219 x 172 mm) |
| Drivers | 5” woofer, 1” tweeter |
| EQ | No |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX4 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Partially (1 woofer) |
| TWS | No |
| USB Playback | No |
| Voice Assistants | Google Assistant |
| Weight | 6.3 lbs (2.85 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Ezekielo: Citation 200 vs Beolit 20 with Sound Comparison!
- KULAS TECH SHOW: Harman Kardon Citation 200 vs JBL Xtreme3 Sound & Bass test More from KULASTECHSHOW20 →
- Ezekielo: Citation 200 vs Onyx Studio 6 vs Bose Portable Speaker Sound Comparison
- KULAS TECH SHOW: Harman Kardon Citation 200 vs Onyx Studio 7 Bass comparison
- Head-to-Head Comparisons
- Harman Kardon Citation 200 vs B&O Beosound A5
- Harman Kardon Citation 200 vs Soundcore Motion Boom
- Harman Kardon Citation 200 vs Marshall Stockwell II
- Harman Kardon Citation 200 vs Soundcore Select Pro
- Harman Kardon Citation 200 vs Soundcore Boom 2
- Harman Kardon Citation 200 vs B&O Beoplay A2 active
- Harman Kardon Citation 200 vs Bose SoundLink Max
- Harman Kardon Citation 200 vs JBL Xtreme 3
- See all 69 comparisons
Harman Kardon Onyx Studio 6: $130 Discontinued Amazon eBay
Newer model: the Harman Kardon Onyx Studio 9, ranked lower, rated 4.1/5, released Dec 2024.
Older models: the Harman Kardon Onyx Studio 5 (ranked lower, rated 3.9/5) and the Harman Kardon Onyx Studio 4 (rated 3.3/5). See every Harman Kardon Onyx Studio generation.
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 →
| Released | Sep 2019 (7 years ago) |
|---|---|
| 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!
- Alan Ross Reviews: https://www.youtube.com/watch?v=K5ImoaGw3t0
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 6 vs Harman Kardon Onyx Studio 8
- Harman Kardon Onyx Studio 6 vs Harman Kardon Onyx Studio 7
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- Harman Kardon Onyx Studio 6 vs Yeahbox Sonic Boom Ultra
- Harman Kardon Onyx Studio 6 vs Vifa Copenhagen 2.0
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- Harman Kardon Onyx Studio 6 vs Zealot ZE41
- Harman Kardon Onyx Studio 6 vs JBL Partybox Encore Essential
- See all 64 comparisons