JBL Partybox Encore Essential vs Harman Kardon Onyx Studio 5

Last updated: August 19, 2026

Short answer: the JBL Partybox Encore Essential. It ranks #7 of 73 boombox speakers by sound quality at $299.95; the Harman Kardon Onyx Studio 5 ranks #19 and costs $499.99, so there is not much of a tradeoff to weigh.

What the JBL Partybox Encore Essential offers: A great sounding somewhat boosted bass party speaker. Set against that: Only 6 hours of battery at medium volume. Poor Water rating.

On the Harman Kardon Onyx Studio 5 side: 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.

Buy the JBL Partybox Encore Essential. It ranks higher for sound quality than the Harman Kardon Onyx Studio 5 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 JBL Partybox Encore Essential at IPX4 (splashing).

JBL Partybox Encore Essential vs Harman Kardon Onyx Studio 5

Specifications Side By Side

JBL Partybox Encore Essential Harman Kardon Onyx Studio 5
Price$299.95$499.99
Ranked#7 of 73 in Boombox Size Portable Bluetooth Speakers#19 of 73 in Boombox Size Portable Bluetooth Speakers
AppYes (JBL PartyBox app)No
Aux InputYesYes
Aux Latency17ms-
Bass Extension (-10dB)38Hz-
Battery Life6 hours (Manufacturer specified)8 hours (Manufacturer specified)
Bluetooth CodecsSBCSBC
Built in MicrophoneNoYes
EQYes (3 band App EQ)No
IP RatingIPX4IPX7
Bluetooth Latency100ms-
Party ModeYes (PartyBoost up to 100 speakers)Yes (Wireless Dual Sound)
Power BankYes (USB-A, 5V/0.5A)No
Power InputAC Power cordDC Barrel Connector (19V/2.1A)
StereoYesPartially (1 woofer)
OmnidirectionalNoNo
TWSYesYes (see https://www.reddit.com/r/Bluetooth_Speakers/comments/w339x5/how_to_harman_kardon_onyx_studio_5_6_dual_sound/)
USB PlaybackYesNo
Weight13 lbs / 5.9 kg6.6 lbs / 3 kg
Bluetooth Version5.1-
Output Power100W RMS50W
Dimensions10.9" x 12.9" x 11.5" (276 x 327 x 293 mm)11.3" x 11.3" (285.8 x 285.8 mm)
Drivers135mm woofer + 2x 44mm tweeters2x 75mm woofers + 2x 20mm tweeters
Max Volume110dB-
Digital Aux InputNoNo

More useful head-to-heads from the same speaker class:

The Two Speakers In Full

JBL Partybox Encore Essential: $299.95 Amazon

JBL Partybox Encore Essential ranking card

Pros: A great sounding somewhat boosted bass party speaker.

Cons: Only 6 hours of battery at medium volume. Poor Water rating.

AppYes (JBL PartyBox app)
Aux InputYes
Aux Latency17ms
Bass Extension (-10dB)38Hz
Battery Life6 hours (Manufacturer specified)
Bluetooth CodecsSBC
Bluetooth Latency100ms
Bluetooth Version5.1
Built in MicrophoneNo
Digital Aux InputNo
Dimensions10.9" x 12.9" x 11.5" (276 x 327 x 293 mm)
Drivers135mm woofer + 2x 44mm tweeters
EQYes (3 band App EQ)
IP RatingIPX4
Max Volume110dB
OmnidirectionalNo
Output Power100W RMS
Party ModeYes (PartyBoost up to 100 speakers)
Power BankYes (USB-A, 5V/0.5A)
Power InputAC Power cord
StereoYes
TWSYes
USB PlaybackYes
Weight13 lbs / 5.9 kg

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

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.