Yeahbox Sonic Boom Ultra vs Sony ULT Field 7

Q: Which is better, the Yeahbox Sonic Boom Ultra or the Sony ULT Field 7?

Short answer: the Yeahbox Sonic Boom Ultra. It ranks #10 of 75 boombox speakers by sound quality at $349.20; the Sony ULT Field 7 ranks #42 and costs $400, which makes this an easy call rather than a real tradeoff.

Q: Should I buy the Yeahbox Sonic Boom Ultra or the Sony ULT Field 7?

Buy the Yeahbox Sonic Boom Ultra. It ranks higher for sound quality than the Sony ULT Field 7 and costs less, so the other one has nothing left to offer.

Short answer: the Yeahbox Sonic Boom Ultra. It ranks #10 of 75 boombox speakers by sound quality at $349.20; the Sony ULT Field 7 ranks #42 and costs $400, which makes this an easy call rather than a real tradeoff.

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.

What the Sony ULT Field 7 offers: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its ~52Hz specification. There is no companion app.

Buy the Yeahbox Sonic Boom Ultra. It ranks higher for sound quality than the Sony ULT Field 7 and costs less, so the other one has nothing left to offer.

Looking for alternatives? See the complete Portable Bluetooth rankings.

Buy the Yeahbox Sonic Boom Ultra at Amazon ($349.20) →Buy the Sony ULT Field 7 at Amazon ($400) →

Specifications Side By Side

	Yeahbox Sonic Boom Ultra	Sony ULT Field 7
Price	$349.20	$400
Ranked	#10 of 75 in Boombox Size Portable Bluetooth Speakers	#42 of 75 in Boombox Size Portable Bluetooth Speakers
App	Yes	No
Aux Input	Yes	Yes
Battery Capacity	45000mAh (Reviewer estimated)	-
Bluetooth Version	6.0	5.2
Dimensions	23.4" x 9.8" x 12.3" (595 x 248 x 313 mm)	20.2" x 8.8" x 8.7" (512 x 224 x 222 mm)
Drivers	6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way	2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters
EQ	Yes (Country, Classic, and custom app EQ; custom settings don't persist after the app closes)	Yes (App + ULT button)
Inputs	HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic	-
IP Rating	IPX6	IP67
MicroSD Playback	Yes	-
Amplifier Power	320W RMS / 500W Peak	100W
Party Mode	No (TWS stereo pairing of 2 units only, no Auracast)	Yes (Party Connect up to 100 speakers)
Power Input	USB-C (60W fast charging)	AC Power cord
Stereo	Yes	Yes
Omnidirectional	No	No
TWS	Yes	Yes
USB Playback	Yes	Yes
Weight	24.3 lbs (11 kg)	13.9 lbs (6.3 kg)
Digital Aux Input	No	No
Bluetooth Codecs	SBC (inferred; additional codecs unverified)	SBC, AAC, LDAC
Lights	Yes	-
Bass Extension (-10dB)	-	~52Hz
Battery Life	-	30 hours (Manufacturer specified)
Guitar Input	-	Yes
Microphone Input	-	Yes (Karaoke mode with echo effect)
Power Bank	-	Yes (USB-A, 5V/1.5A)
Built-in Microphone	-	Yes

Buy the Yeahbox Sonic Boom Ultra at Amazon ($349.20) →Buy the Sony ULT Field 7 at Amazon ($400) →

More worthwhile head-to-heads for Yeahbox Sonic Boom Ultra:

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.

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

The Two Speakers In Full

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 →

Sony ULT Field 7: $400 Amazon eBay

Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).

Cons: Bass is limited by its ~52Hz specification. There is no companion app.

Full Sony ULT Field 7 review and specifications →

Amplifier Power	100W
App	No
Aux Input	Yes
Bass Extension (-10dB)	~52Hz
Battery Life	30 hours (Manufacturer specified)
Bluetooth Codecs	SBC, AAC, LDAC
Bluetooth Version	5.2
Built-in Microphone	Yes
Digital Aux Input	No
Dimensions	20.2" x 8.8" x 8.7" (512 x 224 x 222 mm)
Drivers	2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9") tweeters
EQ	Yes (App + ULT button)
Guitar Input	Yes
IP Rating	IP67
Microphone Input	Yes (Karaoke mode with echo effect)
Omnidirectional	No
Party Mode	Yes (Party Connect up to 100 speakers)
Power Bank	Yes (USB-A, 5V/1.5A)
Power Input	AC Power cord
Stereo	Yes
TWS	Yes
USB Playback	Yes
Weight	13.9 lbs (6.3 kg)

Check current price at Amazon ($400) →Search eBay for Sony ULT Field 7 →

Specifications Side By Side

Related Speaker Comparisons

The Two Speakers In Full

Yeahbox Sonic Boom Ultra: $349.20 Amazon eBay

Sony ULT Field 7: $400 Amazon eBay