Bass with bite.
320W rated output, a 6 × 9-inch racetrack woofer and dual passive radiators.
ExploreYEAHBOX Sonic Boom Ultra K
320W rated output.
Unleash the bass.
A 6 × 9-inch woofer and dual passive radiators anchor a three-way, five-driver system. Feel the rhythm. Hear the detail.
320W rated outputThree-way, five-driver system6 × 9-inch woofer
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YEAHBOX Sonic Boom
Ultra K
A 320W rated, three-way speaker with five active drivers, a 6 × 9-inch woofer and dual passive radiators. Choose from three EQ presets and multiple music sources, with RGB lighting and an included mixer controller and two wireless mics.
- 320W rated output
- Three-way, five-driver system
- 6 × 9-inch woofer
Included with every Ultra K
Included in the set: 1 Ultra K speaker, 2 wireless microphones and 1 mixer controller.
ColorBlack
Current priceHK$3,202.00 HKD
Available
Shipping, taxes and service terms depend on the selected region and checkout.
Start with the bass.
Stay for the whole song.
A sound system built around bass, vocals and high-frequency detail.
Five drivers. Three-way sound.
Dedicated bass, midrange and treble drivers make up the three-way system.
ExploreSet the sound to your taste.
Choose Full Range, Bass or Outdoor EQ to suit the track and setting.
ExploreA look that sets the mood.
RGB infinity-mirror lighting and the handle light strip add color to the moment.
ExploreThree-way system · Five active drivers
Five drivers. Three-way sound.
Hear the power. Hear the detail.
Ultra K uses dedicated drivers for bass, midrange and treble. One woofer, two midrange drivers and two tweeters give rhythm, vocals and instruments their own roles in the three-way system.
Bass carries the rhythm.
One 6 × 9-inch racetrack woofer handles the lows, with the kick drum and bass line at the heart of the track.
Midrange gives vocals their place.
Two dedicated midrange drivers reproduce vocals and instruments in the middle frequencies.
Treble keeps the details in play.
Two dedicated tweeters reproduce high-frequency detail, including cymbals and string overtones.
6 × 9-inch woofer · Dual passive radiators
6 × 9-inch woofer.
Bass that hits.
A 6 × 9-inch racetrack woofer forms the bass core, supported by dual passive radiators. Let the bass line and kick drum drive the mood of your favorite track.
Dual-core processing · Dual-amplifier drive
Dual-core processing.
Dual-amplifier drive.
Dual-core sound processing and dual-amplifier drive support the three-way, five-driver system, handling signal processing and power amplification.
Three EQ presets · Physical volume roller
Three EQ presets.
Dial in your sound.
Choose Full Range, Bass or Outdoor EQ to suit your music and setting. The physical roller keeps volume adjustment close at hand.
A starting point for your favorite album.
Explore the presets. These controls do not change a connected speaker.RGB infinity-mirror lighting
RGB infinity mirrors.
Set the mood alight.
Layered infinity-mirror lighting and the RGB handle strip outline Ultra K in color. A distinct silhouette by day, a different mood after dark.
From living room to deck.
Let the music lead.
A favorite album at home, friends taking turns choosing tracks, or an afternoon on deck. Bring familiar music into a new setting.
Bring the performance into the living room.
Connect to an ARC-compatible TV for concert films and everyday viewing. HDMI ARC support and the correct TV audio-output setting are required.
Sea air. A shared playlist.
Settle in on deck and let a friend choose the next track. Give the afternoon a soundtrack.
Your turn to choose the track.
Pass around the playlist and share the songs you love. Make the music part of getting together.
Included mixer controller · Two wireless microphones
Take the next verse.
Two wireless mics included.
Ultra K includes a mixer controller and two wireless microphones. Set vocal and music volume separately, then adjust tone and effects. Share a song in your own voices.
Set the balance.
Make the song yours.
Use the mixer controller’s physical knobs and buttons to adjust vocal and music volume, tone and effects.
- One mixer controller, two wireless mics
- Separate vocal and music volume
- Tone and effect controls
More ways into your music.
Play a phone playlist, load a local music library or connect a wired source. Add a second compatible Ultra K to spread the music across left and right channels.
Bluetooth 6.0
Connect your phone via Bluetooth and play a favorite playlist.
USB and TF music libraries
Play local WAV, FLAC, APE and MP3 files. Compatibility depends on file encoding and playback conditions.
AUX and HDMI ARC
Connect a wired audio source via AUX, or use ARC with a compatible TV.
TWS stereo pairing
Pair two compatible Ultra K speakers for left and right channels. The second speaker is sold separately.
About 24 hours of playback at 30% volume
About 24 hours.*
Keep the playlist going.
About 24 hours of playback at 30% volume, with stated 60W charging support. Make time for your favorite album, then a playlist chosen by friends.
About 24 hours160W stated charging power
Stated playback time of about 24 hours is based on 30% volume. Actual runtime varies with source, volume, lighting and microphone use.
Grip the handle.
Find a new listening spot.
The 595 mm-wide body has an integrated handle. Grip it firmly when moving between listening spots. Speaker net weight is approximately 10.56 kg.
595 × 248 × 313 mm (W × D × H, including handle) · Approx. 10.56 kg speaker net weight
Know the details before you choose.
The sound system, connections, playback conditions and physical dimensions in one place.
- Rated output
- 320W
- Audio system
- Three-way; one woofer + two midrange drivers + two tweeters (five active drivers)
- Woofer
- 6 × 9-inch racetrack woofer
- Passive radiators
- Two
- Sound processing
- Dual-core sound processing
- Amplification
- Dual-amplifier drive
- EQ presets
- Full Range / Bass / Outdoor
- Bluetooth
- 6.0
- Other audio sources
- USB, TF/microSD, AUX, HDMI ARC
- Local playback formats
- WAV / FLAC / APE / MP3 [4]
- TV connection
- HDMI ARC; compatible TV and correct audio-output setting required [2]
- Stereo pairing
- TWS left/right stereo; two compatible Ultra K speakers, second sold separately [3]
- Lighting
- RGB infinity-mirror and handle lighting
- Physical controls
- Volume roller, Ultra K top controls and integrated handle
- Stated playtime
- About 24 hours at 30% volume [1]
- Stated charging power
- 60W
- Stated battery capacity
- 45,000 mAh
- Dimensions
- 595 × 248 × 313 mm (W × D × H, including handle)
- Speaker net weight
- Approximately 10.56 kg
- Color
- Black / White
- Karaoke accessories
- Mixer controller ×1, wireless microphones ×2
- Mixer controls
- Separate vocal/music volume; tone and effect controls
Playback and compatibility notes
- Stated playback time of about 24 hours is based on 30% volume. Actual runtime varies with source, volume, lighting and microphone use.
- HDMI ARC requires an ARC-compatible TV and the correct audio-output setting.
- TWS requires two compatible Ultra K speakers; the second is sold separately. Microphone audio across both speakers is not confirmed.
- Local audio compatibility depends on file encoding and playback conditions.
A few things to know.
Is Ultra K mainly for music or karaoke?
Music is the focus of Ultra K’s 320W rated output and three-way, five-driver system. The included mixer controller and two wireless microphones add a singalong option whenever you want it.
What comes with Ultra K?
Each kit includes one Ultra K speaker, one mixer controller and two wireless microphones, in Black or White. Check the current product listing for cables, charging equipment and other accessories.
Is 320W the rated output?
Yes. 320W is the rated output of Ultra K’s speaker system.
How do the five drivers and passive radiators differ?
The five active drivers are one woofer, two midrange drivers and two tweeters in a three-way system. The two passive radiators are part of the bass system and are not additional active speakers.
Does Ultra K have a one-touch BASS button?
Ultra K offers Full Range, Bass and Outdoor EQ presets. Bass EQ is a preset option; Ultra K does not have the one-touch BASS button found on the standard Ultra.
Can I adjust the vocal and backing track?
Yes. Use the mixer controller to adjust vocal and music volume separately, with tone and effect controls to suit the song.
What does the stated 24-hour playtime mean?
About 24 hours of playback is stated at 30% volume. Runtime varies with the source, volume, lighting and microphone use. It is not a claim for maximum-volume or continuous karaoke playback.
Does 60W tell me how long a full charge takes?
60W is the stated charging power. A fixed full-charge time is not specified. Check the current product information for compatible charging equipment and what is included.
How do I connect a TV?
Use HDMI ARC with an ARC-compatible TV and select the required audio-output setting. A standard HDMI port does not necessarily support ARC, so check your TV before connecting.
Can two speakers form a stereo pair?
Two compatible Ultra K speakers can form a TWS left/right stereo pair. The second is sold separately. Cross-model pairing and microphone audio across both speakers are not confirmed.
Can I play local music as well as Bluetooth audio?
Ultra K supports local WAV, FLAC, APE and MP3 playback from USB and TF/microSD, plus wired AUX sources. File playback depends on encoding and playback conditions.
How much room does Ultra K need?
The speaker measures 595 × 248 × 313 mm (W × D × H, including handle) and weighs approximately 10.56 kg. Allow space for it on a stable supporting surface and grip the handle firmly when moving it.
