Stereo portable speaker Ultimate Ears MEGABOOM 4 — cylinder design, wireless Bluetooth, 45 m range, passive radiator 55×86 mm, black

Ultimate Ears MEGABOOM 4 is a stereo portable speaker in a cylindrical black enclosure that delivers immersive 360° sound and robust bass. The speaker uses wireless Bluetooth connectivity with the A2DP profile and supports an operating range up to 45 m. It incorporates a passive radiator sized 55×86 mm and produces a maximum sound pressure level of 91 dB. The compact, waterproof and impact-tolerant housing and long battery life make it suitable for home, outdoor and travel use.

Advantages

MEGABOOM 4 features a cylindrical design that radiates sound evenly in all directions, providing spatial stereo coverage without the need to reposition the unit. The passive radiator tuned for lower frequencies delivers deeper, richer bass while preserving clarity. Wireless Bluetooth connectivity enables straightforward pairing and playback from compatible devices using the A2DP profile, and the speaker’s durable build is resistant to water, dust and drops for reliable performance in varied environments.

Suitable for

• Listening to music at home or in small gatherings
• Outdoor activities and trips where portable, loud audio is needed
• Poolside or beach use thanks to water-resistant design
• Portable voice and podcast playback
• Multi-speaker setups when combined via app-based pairing features

Key specifications

• Speaker type: stereo portable speaker, cylindrical enclosure
• Connectivity: wireless Bluetooth with A2DP profile
• Wireless range: up to 45 m
• Passive radiator size: 55 × 86 mm
• Maximum sound pressure level: 91 dB
• Color: black
• Control: on-unit play/pause/skip via magic button and app integration for EQ presets
• Durability: water-, dust- and drop-resistant construction; floatable design
• Battery life: up to 20 hours per charge

How to use

Charge the speaker before first use, then power it on and enable Bluetooth on your source device. Select the MEGABOOM 4 from the device’s Bluetooth list using the A2DP profile to start playback. Use the on-unit controls or the UE | BOOM app to play, pause or skip tracks and to select or customize EQ presets. For multi-speaker setups, use the app’s pairing feature to link compatible speakers and manage sound distribution.

Usage recommendations

Place the MEGABOOM 4 centrally in listening areas to maximize the 360° sound dispersion. Keep the speaker within the specified Bluetooth range for uninterrupted streaming, and rinse or dry the exterior after exposure to salt water. Use the app to select appropriate EQ modes for music, speech or small enclosed spaces.