Short answer: the Vifa Copenhagen 2.0 if sound quality matters most, the Yeahbox Sonic Boom Ultra if price matters most. The Vifa Copenhagen 2.0 ranks #9 of 75 boombox speakers at $800. The Yeahbox Sonic Boom Ultra ranks #10 at $388, $412 cheaper.
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 Vifa Copenhagen 2.0 offers: Fabric finish is easy to clean and cozy to touch. Durable - dropped from 2m with only minor scratches. Wi-Fi/AirPlay/wired (optical, aux, USB) in addition to Bluetooth. ~5 hour battery at full volume. Watch for: 350hz and 2-3khz peak. The Vifa Helsinki is cheaper and generally has a more neutral frequency response, I’d highly recommend getting one of those instead if you specifically want a Vifa. Not sure I can recommend this one generally these days, the Uboom L has 95% of the sound quality with more features and a way cheaper price. No water rating.
Buy the Yeahbox Sonic Boom Ultra if the price is the priority over sound quality, or the Vifa Copenhagen 2.0 if sound quality is the priority over the price.
If water resistance matters to you, the Yeahbox Sonic Boom Ultra at IPX6 (powerful water jets) holds up far better than the Vifa Copenhagen 2.0 at no water resistance.
Specifications Side By Side
| Yeahbox Sonic Boom Ultra | Vifa Copenhagen 2.0 | |
|---|---|---|
| Price | $388.00 | $800 |
| Ranked | #10 of 75 in Boombox Size Portable Bluetooth Speakers | #9 of 75 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth Version | 6.0 | 4.1 |
| Dimensions | 23.4" x 9.8" x 12.3" (595 x 248 x 313 mm) | 10.6" x 3.5" x 14.3" (268 x 90 x 362 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x 94mm woofers + 2x 50mm midrange + 2x 28mm tweeters + 4 passive radiators |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | No |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | None |
| MicroSD Playback | Yes | - |
| Output Power | 320W RMS / 500W Peak | 100W |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | Yes |
| Weight | 24.3 lbs / 11 kg | 10.3 lbs / 4.65 kg |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC, aptX HD |
| Bass Extension (-10dB) | - | 46Hz |
| Battery Life | - | 8 hours (Manufacturer specified) |
| Built in Microphone | - | No |
| Power Bank | - | No |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- Turtlebox Grande vs Harman Kardon Onyx Studio 8
- JBL Partybox 330 vs Aiwa Exos-9
- JBL Boombox 4 vs Aiwa Exos-9
- JBL Partybox Encore Essential vs Vifa Copenhagen 2.0
- Turtlebox vs Vifa Copenhagen 2.0
Prices on this page were last checked September 8, 2026 at 6:02 PM 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
Yeahbox Sonic Boom Ultra: $388.00 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 →
| 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 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 320W RMS / 500W Peak |
| 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 |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Zealot Ze41!!! Battle Of Big Boys!!! 😜😜😜 More from Jagistreviews →
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Zealot Ze21!!! Battle Of The Deep Bass 🥳🥳🥳
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs W-king X20!!! Old Vs New!!! 🫨🫨🫨
- Techder Audios: YEAHBOX Sonic Boom Ultra VS JBL Boombox 4 “IT BEATS THE KING!?😈😱” More from techderaudios →
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Tribit Stormbox Blast 2 Firmware 11!!! Holy Crap!!! 🤩🤩🤩
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Hopestar A95!!! Battle Of Big Boys!!!! 😘😘😘
- Jagist reviews: Yeahbox Sonic Boom Ultra!!! 💥 Unboxing And Review!!! Absolutely A Beast 💯 🥵🥵🥵
- Techder Audios: YEAHBOX Sonic Boom Ultra - Soundtest “DEEP SUBWOOFER LIKE PERFORMANCE!🔥”
- Audio y Mas: El Woofer Más GRANDE en un Altavoz, Yeahbox Sonic Boom Ultra
- Jagist reviews: Yeahbox Sonic Boom Ultra Bass Test!!! What A Beast!!! 😍😍😍
- brett levesque: Yeahbox sonic boom ultra hertz test
- Jagist reviews: Yeahbox Sonic Boom Ultra Hertz Test!!! How Low Will She Go??? 😛😛😛
Vifa Copenhagen 2.0: $800 Amazon eBay
Pros: Fabric finish is easy to clean and cozy to touch. Durable - dropped from 2m with only minor scratches. Wi-Fi/AirPlay/wired (optical, aux, USB) in addition to Bluetooth. ~5 hour battery at full volume.
Cons: 350hz and 2-3khz peak. The Vifa Helsinki is cheaper and generally has a more neutral frequency response, I’d highly recommend getting one of those instead if you specifically want a Vifa. Not sure I can recommend this one generally these days, the Uboom L has 95% of the sound quality with more features and a way cheaper price. No water rating.
Full Vifa Copenhagen 2.0 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 46Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX HD |
| Bluetooth Version | 4.1 |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10.6" x 3.5" x 14.3" (268 x 90 x 362 mm) |
| Drivers | 2x 94mm woofers + 2x 50mm midrange + 2x 28mm tweeters + 4 passive radiators |
| EQ | No |
| IP Rating | None |
| Omnidirectional | No |
| Output Power | 100W |
| Party Mode | No |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | No |
| USB Playback | Yes |
| Weight | 10.3 lbs / 4.65 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Vifa Copenhagen 2.0 vs Aiwa Exos-9
- Vifa Copenhagen 2.0 vs Harman Kardon Onyx Studio 8
- Vifa Copenhagen 2.0 vs JBL Partybox Encore Essential
- Vifa Copenhagen 2.0 vs Harman Kardon Onyx Studio 6
- Vifa Copenhagen 2.0 vs Harman Kardon Onyx Studio 9
- Vifa Copenhagen 2.0 vs JBL Boombox 4
- Vifa Copenhagen 2.0 vs B&O Beolit 20
- Vifa Copenhagen 2.0 vs Turtlebox