Harman Kardon Onyx Studio 5 vs B&O Beolit 20

Last updated: August 19, 2026

Short answer: the Harman Kardon Onyx Studio 5. It ranks #19 of 73 boombox speakers by sound quality at $499.99; the B&O Beolit 20 ranks #31 and costs $649.99, so there is not much of a tradeoff to weigh.

The case for the Harman Kardon Onyx Studio 5: Elegant circular design with carrying handle. Bass-heavy with balanced mids and highs. Watch for: Warm sound with boosted bass. 8 hour battery at medium volume. Not at loud as others.

What the B&O Beolit 20 gets right: Wireless phone charging. The tradeoff: Warm sound. Rolled off treble. Bass not as deep as the Onyx Studio 7.

Buy the Harman Kardon Onyx Studio 5. It ranks higher for sound quality than the B&O Beolit 20 and costs less, so there is no real case for the other one.

If water resistance matters to you, the Harman Kardon Onyx Studio 5 at IPX7 (brief submersion) holds up far better than the B&O Beolit 20 at IPX4 (splashing).

Harman Kardon Onyx Studio 5 vs B&O Beolit 20

Specifications Side By Side

Harman Kardon Onyx Studio 5 B&O Beolit 20
Price$499.99$649.99
Ranked#19 of 73 in Boombox Size Portable Bluetooth Speakers#31 of 73 in Boombox Size Portable Bluetooth Speakers
Aux InputYesYes
Battery Life8 hours (Manufacturer specified)8 hours (Manufacturer specified)
IP RatingIPX7IPX4
Party ModeYes (Wireless Dual Sound)No
Power InputDC Barrel Connector (19V/2.1A)USB-C
StereoPartially (1 woofer)No
OmnidirectionalNoYes
TWSYes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/)Yes
Weight6.6 lbs / 3 kg6 lbs / 2.7 kg
Bluetooth CodecsSBCSBC
AppNoYes (Bang & Olufsen app)
EQNoYes (App EQ)
Power BankNoYes (USB-C)
USB PlaybackNoNo
Built in MicrophoneYesYes
Output Power50W240W peak
Dimensions11.3" x 11.3" (285.8 x 285.8 mm)5.3" x 9.1" x 7.4" (135 x 230 x 189 mm)
Drivers2x 75mm woofers + 2x 20mm tweeters2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators
Digital Aux InputNoNo
Bass Extension (-10dB)-45Hz
Max Volume-93dB

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The Two Speakers In Full

Harman Kardon Onyx Studio 5: $499.99 Amazon

Harman Kardon Onyx Studio 5 ranking card

Pros: Elegant circular design with carrying handle. Bass-heavy with balanced mids and highs. Rechargeable Li-ion battery rated 7-8 hours at 40-50% volume.

Cons: Warm sound with boosted bass. 8 hour battery at medium volume. Not at loud as others.

AppNo
Aux InputYes
Battery Life8 hours (Manufacturer specified)
Bluetooth CodecsSBC
Built in MicrophoneYes
Digital Aux InputNo
Dimensions11.3" x 11.3" (285.8 x 285.8 mm)
Drivers2x 75mm woofers + 2x 20mm tweeters
EQNo
IP RatingIPX7
OmnidirectionalNo
Output Power50W
Party ModeYes (Wireless Dual Sound)
Power BankNo
Power InputDC Barrel Connector (19V/2.1A)
StereoPartially (1 woofer)
TWSYes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/)
USB PlaybackNo
Weight6.6 lbs / 3 kg

As an eBay Partner, we may be compensated if you make a purchase.

B&O Beolit 20: $649.99 Amazon

B&O Beolit 20 ranking card

Pros: Wireless phone charging.

Cons: Warm sound. Rolled off treble. Bass not as deep as the Onyx Studio 7

AppYes (Bang & Olufsen app)
Aux InputYes
Bass Extension (-10dB)45Hz
Battery Life8 hours (Manufacturer specified)
Bluetooth CodecsSBC
Built in MicrophoneYes
Digital Aux InputNo
Dimensions5.3" x 9.1" x 7.4" (135 x 230 x 189 mm)
Drivers2x 30mm tweeters + 2x 40mm mid-range + 1x 60mm woofer + dual passive radiators
EQYes (App EQ)
IP RatingIPX4
Max Volume93dB
OmnidirectionalYes
Output Power240W peak
Party ModeNo
Power BankYes (USB-C)
Power InputUSB-C
StereoNo
TWSYes
USB PlaybackNo
Weight6 lbs / 2.7 kg

As an eBay Partner, we may be compensated if you make a purchase.