Harman Kardon Onyx Studio 5 vs Demerbox DB2

Last updated: September 16, 2026

Short answer: the Harman Kardon Onyx Studio 5 for better sound quality, the Demerbox DB2 for the lower price. The Harman Kardon Onyx Studio 5 ranks #21 of 75 boombox speakers at $499.99. The Demerbox DB2 ranks #51 at $400, $99.99 cheaper.

Harman Kardon Onyx Studio 5 vs Demerbox DB2

What the Harman Kardon Onyx Studio 5 offers: 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. Watch for: 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.

What the Demerbox DB2 offers: 40+ hour battery life even at higher volumes (real-world: ~14 hrs with phone charging mixed in). Built from a Pelican case - nearly indestructible and waterproof (IP67). Multi-pair up to 6 units. Doubles as power bank and waterproof container. Watch for: Bass is not as deep as better speakers. Very overpriced.

Buy the Harman Kardon Onyx Studio 5 when sound quality outweighs the price for you, and the Demerbox DB2 when the price outweighs sound quality instead.

There is a real battery-life gap here: the Demerbox DB2 is rated for 40 hours, the Harman Kardon Onyx Studio 5 only 8 hours.

Still deciding? The full Portable Bluetooth rankings cover every ranked option.

Buy the Harman Kardon Onyx Studio 5 at Amazon ($499.99) →Buy the Demerbox DB2 at Amazon ($400) →

Specifications Side By Side

Harman Kardon Onyx Studio 5 Demerbox DB2
Price$499.99$400
Ranked#21 of 75 in Boombox Size Portable Bluetooth Speakers#51 of 75 in Boombox Size Portable Bluetooth Speakers
Aux InputYesYes
Battery Life8 hours (Manufacturer specified)40 hours (Manufacturer specified)
IP RatingIPX7IP67
Party ModeYes (Wireless Dual Sound)No
Power InputDC Barrel Connector (19V/2.1A)AC Power brick
StereoPartially (1 woofer)Yes
OmnidirectionalNoNo
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 kg)5.4 lbs (2.47 kg)
Bluetooth CodecsSBCSBC
AppNoNo
EQNoNo
Power BankNoYes (USB-A + USB-C)
USB PlaybackNoNo
Built-in MicrophoneYesNo
Amplifier Power50W22W RMS
Dimensions11.3" x 11.3" (285.8 x 285.8 mm)10.6" x 9.7" x 6.9" (270 x 246 x 175 mm)
Drivers2x 75mm woofers + 2x 20mm tweeters2x 3" (76mm) aluminum cone full-range drivers
Digital Aux InputNoNo
FM Tuner-No
Buy the Harman Kardon Onyx Studio 5 at Amazon ($499.99) →Buy the Demerbox DB2 at Amazon ($400) →

More top alternatives to Harman Kardon Onyx Studio 5:

Prices on this page were last checked September 16, 2026 at 12:41 AM 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 5: $499.99 Amazon eBay

Harman Kardon Onyx Studio 5 ranking card

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 Power50W
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
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)
Check current price at Amazon ($499.99) →Search eBay for Harman Kardon Onyx Studio 5 →

Demerbox DB2: $400 Amazon eBay

Demerbox DB2 ranking card

Pros: 40+ hour battery life even at higher volumes (real-world: ~14 hrs with phone charging mixed in). Built from a Pelican case - nearly indestructible and waterproof (IP67). Multi-pair up to 6 units. Doubles as power bank and waterproof container.

Cons: Bass is not as deep as better speakers. Very overpriced.

Full Demerbox DB2 review and specifications →

Amplifier Power22W RMS
AppNo
Aux InputYes
Battery Life40 hours (Manufacturer specified)
Bluetooth CodecsSBC
Built-in MicrophoneNo
Digital Aux InputNo
Dimensions10.6" x 9.7" x 6.9" (270 x 246 x 175 mm)
Drivers2x 3" (76mm) aluminum cone full-range drivers
EQNo
FM TunerNo
IP RatingIP67
OmnidirectionalNo
Party ModeNo
Power BankYes (USB-A + USB-C)
Power InputAC Power brick
StereoYes
TWSYes
USB PlaybackNo
Weight5.4 lbs (2.47 kg)
Check current price at Amazon ($400) →Search eBay for Demerbox DB2 →