Massive Bass. Built for Motion.
Bring stadium-level energy wherever you go with the Sony ULT FIELD 5 (SRS-ULT50) Wireless Portable Speaker. Part of Sony's ULT POWER SOUND series, this compact powerhouse features dedicated dual bass modes (ULT1 & ULT2) designed to accentuate deep low-end frequencies and deliver crushing punchy bass at any volume.
Equipped with an IP66/IP67 dustproof and waterproof design, up to 25 hours of battery life, ambient 360° Party Lighting, and a handy detachable shoulder strap, the SRS-ULT50 is engineered for music on the move—at home, at the beach, or on the road.
Key Features
ULT POWER SOUND™ Dual Bass Boost
Hit the dedicated ULT button to unlock two distinct sound modes: ULT1 for deep, low-frequency bass, or ULT2 for punchy, high-energy impact.
All-Weather Rugged Durability (IP66/IP67)
Take your sound anywhere. The SRS-ULT50 is waterproof, dustproof, and rustproof, making it suitable for pool parties, beach trips, and outdoor adventures.
25-Hour Battery Life & Smartphone Power Bank
Keep the party going all day and night with up to 25 hours of playback. Plus, use the built-in USB Type-C port as a power bank to charge your smartphone on the go.
Sound Field Optimization & Ambient Lighting
Built-in sensors detect background noise and automatically tweak sound settings for optimal acoustics. Ambient 360° Party Lighting synchronizes subtle glow effects with your music's beat.
High-Resolution Bluetooth 5.3 & LDAC
Stream high-definition audio wirelessly via LDAC codec support. Connect two units for Stereo Pair mode or link multiple compatible Sony speakers using Party Connect.
See the ULT FIELD 5 in Action
Technical Specifications
| Model Name | Sony ULT FIELD 5 (SRS-ULT50) |
| Speaker Units | Tweeter: ~Φ46 mm | Woofer: ~79 mm x 107 mm |
| Sound Modes | ULT POWER SOUND: 2 (ULT1 / ULT2), 10-Band Custom EQ |
| Battery Life | Up to 25 Hours |
| Water & Dust Protection | IP66 / IP67 Rating |
| Bluetooth® Version | Bluetooth 5.3 (2.4 GHz frequency range) |
| Supported Audio Codecs | SBC, AAC, LDAC |
| Frequency Transmission Range | 20 Hz - 20,000 Hz (44.1 kHz sampling) |
| Input/Output Terminals | Stereo Mini Jack (3.5mm IN), USB Type-C® (DC IN / OUT) |
| Speaker Pairing Functions | Stereo Pair, Party Connect |
| Dimensions (W x H x D) | Approx. 320 mm x 144 mm x 125 mm |
| Weight | Approx. 3.3 kg |
| App Support | Sony | Sound Connect |
What’s in the Box?
- Sony ULT FIELD 5 Wireless Portable Speaker (SRS-ULT50)
- USB Type-C® Charging Cable (C to C)
- Detachable Shoulder Strap
- Reference & Instruction Manual