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Sony ULT Field 3 Bluetooth Speaker
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Sony ULT Field 3 is a rugged, portable Bluetooth speaker released in 2025, part of Sony’s ULT (Ultimate) series focused on powerful bass. It’s a compact, durable option for outdoor use, parties, or everyday listening, succeeding models like the SRS-XE300.
Key Specifications
- Design & Build: Rectangular fabric-covered body (256 × 113 × 79 mm / ~10.1 × 4.4 × 3.1 in, 1.2 kg / 2.6–2.7 lbs). IP67 waterproof, dustproof, rustproof, and shock-resistant. Includes a detachable shoulder strap for easy carrying. Available in Black, Off White, Forest Green/Gray.
- Audio: 1× woofer (86×46 mm), 1× tweeter (20 mm), passive radiators. ULT Power Sound button for boosted bass. 7-band EQ via Sony | Sound Connect app. Supports SBC/AAC codecs. Party Connect for linking up to 100 compatible speakers.
- Battery: Up to 24 hours (with ULT mode; real-world often 14–20+ hours depending on volume/settings). Quick charge: ~2 hours playback from 10 minutes. USB-C port doubles as power bank for phones.
- Connectivity: Bluetooth 5.2 (multipoint), USB-C (charging only, no aux). Speakerphone with clear calls.
- Other: Hands-free calling, app control (EQ, sound modes), Sound Field Optimization.
Images of the Sony ULT Field 3:

Performance Highlights
- Sound: Strong, punchy bass in ULT mode; clear but sometimes bright/less refined highs and mids. Good for casual listening and outdoors, though it can get compressed at high volumes. Custom EQ helps tune it.
- Portability & Durability: Excellent for hikes, beach, or poolside — survives drops, water, and dust.
- Battery & Features: Class-leading playtime and power bank functionality make it practical for all-day use.
Pros
- Rugged IP67 build with convenient strap.
- Impressive bass boost and long battery.
- App with detailed EQ; multi-speaker pairing.
Cons
- Bass-focused tuning may lack balance/clarity for some genres (better with EQ or ULT on).
- No high-res audio support or wired input.



