JBL Boombox 4 vs Yeahbox Sonic Boom Ultra

Q: Which is better, the JBL Boombox 4 or the Yeahbox Sonic Boom Ultra?

Short answer: the Yeahbox Sonic Boom Ultra. It ranks #10 of 75 boombox speakers by sound quality at $349.20; the JBL Boombox 4 ranks #19 and costs $549.95, so there is not much of a tradeoff to weigh.

Q: Should I buy the JBL Boombox 4 or the Yeahbox Sonic Boom Ultra?

Buy the Yeahbox Sonic Boom Ultra. It ranks higher for sound quality than the JBL Boombox 4 and costs less, which settles it without a real tradeoff to make.

Short answer: the Yeahbox Sonic Boom Ultra. It ranks #10 of 75 boombox speakers by sound quality at $349.20; the JBL Boombox 4 ranks #19 and costs $549.95, so there is not much of a tradeoff to weigh.

What the JBL Boombox 4 offers: Pretty insane output capability for the size. Watch for: Pretty overpriced for the category. Better than the Boombox 3 mostly because there are more 7 EQ bands instead of just 3 and it can be better tuned. Try Oluv’s EQ for it. Out of the box sounds worse than the Boombox 3. No Aux input.

What the Yeahbox Sonic Boom Ultra offers: By far the loudest boombox tested against it, hitting 106-107dB, roughly 3-5dB louder than the JBL Boombox 4, Zealot ZE41, Tribit Stormbox Blast 2, W-King X20, and Hopestar A90/A95. The massive 6x9in racetrack woofer reaches audible bass down to around 30Hz on the Country EQ preset, and a teardown confirmed genuinely robust internals: a thick vented voice coil and a dedicated crossover output per driver. HDMI ARC input/output lets it double as a TV soundbar, a feature none of its direct competitors offer. Watch for: The 500W peak-power rating doesn’t fully hold up: it gets noisy above roughly 80-90% volume, and the midrange isn’t fully refined, sometimes sitting a touch too forward. The custom EQ in the app noticeably reduces bass output compared to the factory presets and doesn’t persist after the speaker powers off. No Auracast, no removable battery, a plastic handle with some flex, and heavy at 11kg (24lb) for $388. Most of the sound-quality coverage comes from enthusiast listening-test comparisons rather than independent measurement.

Buy the Yeahbox Sonic Boom Ultra. It ranks higher for sound quality than the JBL Boombox 4 and costs less, which settles it without a real tradeoff to make.

Want more options? Browse the full Portable Bluetooth rankings.

Buy the Yeahbox Sonic Boom Ultra at Amazon ($349.20) →Buy the JBL Boombox 4 at Amazon ($549.95) →

Specifications Side By Side

	JBL Boombox 4	Yeahbox Sonic Boom Ultra
Price	$549.95	$349.20
Ranked	#19 of 75 in Boombox Size Portable Bluetooth Speakers	#10 of 75 in Boombox Size Portable Bluetooth Speakers
App	Yes	Yes
Aux Input	No	Yes
Bass Extension (-10dB)	41Hz	-
Battery Life	28 hours (Manufacturer specified)	-
EQ	Yes (7 band)	Yes (Country, Classic, and custom app EQ; custom settings don't persist after the app closes)
IP Rating	IP68	IPX6
Bluetooth Latency	AAC 144ms, SBC 48ms	-
Maximum SPL	115dB (measured by Alan Ross Reviews)	-
Party Mode	Yes (Auracast)	No (TWS stereo pairing of 2 units only, no Auracast)
Power Input	AC Power cord	USB-C (60W fast charging)
Removable Battery	Yes	-
Stereo	Yes	Yes
Omnidirectional	No	No
Weight	13.2 lbs (5.98 kg)	24.3 lbs (11 kg)
Bluetooth Codecs	SBC, LC3, AAC	SBC (inferred; additional codecs unverified)
Bluetooth Version	5.4	6.0
Built-in Microphone	No	-
Power Bank	Yes (USB-C, up to 30W)	-
TWS	Yes	Yes
Digital Aux Input	Yes (USB-C)	No
USB Playback	No	Yes
FM Tuner	No	-
Microphone Input	No	-
MicroSD Playback	No	Yes
Amplifier Power	210W AC / 200W battery	320W RMS / 500W Peak
Dimensions	20.1" x 10.2" x 8.3" (510 x 260 x 210 mm)	23.4" x 9.8" x 12.3" (595 x 248 x 313 mm)
Drivers	2x 123mm woofers + 2x 20mm tweeters with passive radiators	6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way
Battery Capacity	-	45000mAh (Reviewer estimated)
Inputs	-	HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic
Lights	-	Yes

Buy the Yeahbox Sonic Boom Ultra at Amazon ($349.20) →Buy the JBL Boombox 4 at Amazon ($549.95) →

How Yeahbox Sonic Boom Ultra compares with other leading options:

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

JBL Boombox 4: $549.95 Amazon B&H Photo Video eBay

Pros: Pretty insane output capability for the size. Measured bass extension of 41Hz (-10dB).

Cons: Pretty overpriced for the category. Better than the Boombox 3 mostly because there are more 7 EQ bands instead of just 3 and it can be better tuned. Try Oluv’s EQ for it. Out of the box sounds worse than the Boombox 3. No Aux input.

Full JBL Boombox 4 review and specifications →

Amplifier Power	210W AC / 200W battery
App	Yes
Aux Input	No
Bass Extension (-10dB)	41Hz
Battery Life	28 hours (Manufacturer specified)
Bluetooth Codecs	SBC, LC3, AAC
Bluetooth Latency	AAC 144ms, SBC 48ms
Bluetooth Version	5.4
Built-in Microphone	No
Digital Aux Input	Yes (USB-C)
Dimensions	20.1" x 10.2" x 8.3" (510 x 260 x 210 mm)
Drivers	2x 123mm woofers + 2x 20mm tweeters with passive radiators
EQ	Yes (7 band)
FM Tuner	No
IP Rating	IP68
Maximum SPL	115dB (measured by Alan Ross Reviews)
MicroSD Playback	No
Microphone Input	No
Omnidirectional	No
Party Mode	Yes (Auracast)
Power Bank	Yes (USB-C, up to 30W)
Power Input	AC Power cord
Removable Battery	Yes
Stereo	Yes
TWS	Yes
USB Playback	No
Weight	13.2 lbs (5.98 kg)

Check current price at Amazon ($549.95) →Check current price at B&H Photo Video →Search eBay for JBL Boombox 4 →

Yeahbox Sonic Boom Ultra: $349.20 Amazon eBay

Pros: By far the loudest boombox tested against it, hitting 106-107dB, roughly 3-5dB louder than the JBL Boombox 4, Zealot ZE41, Tribit Stormbox Blast 2, W-King X20, and Hopestar A90/A95. The massive 6x9in racetrack woofer reaches audible bass down to around 30Hz on the Country EQ preset, and a teardown confirmed genuinely robust internals: a thick vented voice coil and a dedicated crossover output per driver. HDMI ARC input/output lets it double as a TV soundbar, a feature none of its direct competitors offer.

Cons: The 500W peak-power rating doesn’t fully hold up: it gets noisy above roughly 80-90% volume, and the midrange isn’t fully refined, sometimes sitting a touch too forward. The custom EQ in the app noticeably reduces bass output compared to the factory presets and doesn’t persist after the speaker powers off. No Auracast, no removable battery, a plastic handle with some flex, and heavy at 11kg (24lb) for $388. Most of the sound-quality coverage comes from enthusiast listening-test comparisons rather than independent measurement.

Full Yeahbox Sonic Boom Ultra review and specifications →

Amplifier Power	320W RMS / 500W Peak
App	Yes
Aux Input	Yes
Battery Capacity	45000mAh (Reviewer estimated)
Bluetooth Codecs	SBC (inferred; additional codecs unverified)
Bluetooth Version	6.0
Digital Aux Input	No
Dimensions	23.4" x 9.8" x 12.3" (595 x 248 x 313 mm)
Drivers	6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way
EQ	Yes (Country, Classic, and custom app EQ; custom settings don't persist after the app closes)
IP Rating	IPX6
Inputs	HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic
Lights	Yes
MicroSD Playback	Yes
Omnidirectional	No
Party Mode	No (TWS stereo pairing of 2 units only, no Auracast)
Power Input	USB-C (60W fast charging)
Stereo	Yes
TWS	Yes
USB Playback	Yes
Weight	24.3 lbs (11 kg)

Check current price at Amazon ($349.20) →Search eBay for Yeahbox Sonic Boom Ultra →

Specifications Side By Side

Related Speaker Comparisons

The Two Speakers In Full

JBL Boombox 4: $549.95 Amazon B&H Photo Video eBay

Yeahbox Sonic Boom Ultra: $349.20 Amazon eBay