Sony SRSULT30B Black delivers deep bass and all-day wireless portability

The Sony SRSULT30B Black (ULT Field 3) portable Bluetooth speaker merges strong bass performance, weatherproof durability, and advanced wireless features for music lovers on the go. Built for single-handed carrying or shoulder transport, the ULT Field 3 brings immersive audio whether you’re hosting friends outdoors or relaxing at home. What stands out is its ability to endure the elements and keep music playing after others run out of power.

Unique features for portable listening

Press the ULT button and immediately transform playlists with a powerful bass boost—concert-like sound with a tap. Listeners can fine-tune audio using a 7-band equalizer through the Sound Connect app. Events and travel benefit from flexible pairing: Party Connect and dual-device Bluetooth make this model a versatile centerpiece for any gathering.

Performance that lasts—battery and build quality

Optimized for extended use, the ULT Field 3 delivers up to 24 hours of battery life at moderate volume. Quick charging means you get 2 hours of music after just 10 minutes plugged in. Its IP67 rating provides thorough protection against dust, water, and accidental drops, allowing use in a variety of environments. USB-C charging, power bank capability, and a tough exterior complete its go-anywhere design.

• Battery Life: up to 24 hours—ideal for all-day events or weekends away
• Charging for just 10 minutes gives you up to 2 hours of playback, so you stay in the music with minimal downtime.
• Durability: IP67 waterproof/dustproof/shockproof—confident outdoor use

Sound customization for any event

Fine-tune your listening experience with the 7-band EQ in the Sony Sound Connect app. Boosting bass or refining treble is easy; this model adapts to your preferences and any room’s acoustics. ULT mode especially enhances dance or hip hop tracks.

• ULT Mode: One-touch bass boost—deep, powerful lows are just a tap away
• App control with a 7-band EQ lets you customize your sound signature for different music styles.

Flexible wireless and party features

Party Connect allows you to link up to 100 compatible Sony speakers for synchronized music across larger spaces. With Bluetooth 5.2 and multi-device pairing, switching between users or playlists happens seamlessly.

• Connect up to 100 speakers using Party Connect for room-filling audio at any event.
• Bluetooth Version: 5.2—fast, stable, and energy-efficient wireless

Who will love the ULT Field 3?

The SRSULT30B Black is ideal for music enthusiasts, outdoor adventurers, and anyone looking for a durable, high-performance portable speaker. Its robust build, punchy bass, and flexible use make it a standout for everything from backyard parties to beach days.