Sony ULT FIELD 7 Portable Bluetooth Speaker (Black) – SRS-ULT70

The Sony ULT FIELD 7 (SRS-ULT70) is a powerful, portable party speaker built to go anywhere—classrooms, gyms, outdoor events, and multipurpose rooms. It features Sony’s ULT POWER SOUND bass modes, an X-Balanced Speaker Unit for deeper low end and clearer vocals, dynamic 360° lighting, and a mic/guitar input for karaoke or live announcements. With IP67 waterproof/dustproof/rustproof durability and up to 30 hours of battery life, it’s ready for all-day school and community use.

At a glance

• Connection: Bluetooth wireless + wired inputs
• Power: Internal rechargeable battery
• Battery life: Up to ~30 hours playback*
• Quick charge: ~10 min charge = up to ~3 hours playback
• Speaker design: Stereo portable speaker
• Drivers: 2 × woofers + 2 × tweeters
• Woofer size: Approx. 4.5" (114 mm) each
• Tweeter size: Approx. 1.8" (46 mm) each
• Bass modes: ULT1 (deep low bass) / ULT2 (punchy power bass) via ULT button
• Sound features: Sound Field Optimization, 7-band EQ in app
• Water/dust protection: IP67 (waterproof, dustproof, rustproof)
• Lighting: Multi-color ring lights synced to music
• Inputs: 3.5 mm audio-in, USB-A playback
• Mic / instrument: 1 × 6.3 mm (1/4") MIC/GUITAR input
• USB out: USB-A device charging
• App: Sony Music Center + Fiestable (EQ, lighting, party features)
• Positioning: Use horizontal or vertical
• Weight: Approx. 6.3 kg / 13.9 lb

*Battery life varies by volume, lighting use, and bass mode.

Based on Sony SRS-ULT70 official specifications.

Key features for education

• Room-filling stereo sound with X-Balanced woofers keeps vocals clear for instruction and events.
• ULT bass modes give staff one-button control:
  • ULT1: deeper, lower-frequency bass for big low-end feel.
  • ULT2: stronger, punchier bass for high-energy spaces.
• IP67 durability handles gym floors, outdoor programs, dust, and accidental splashes.
• All-day battery supports assemblies or field-day use without constant charging.
• Mic/guitar input enables karaoke, talent shows, PE instruction, or student performances.

Compatibility and setup

Pair quickly over Bluetooth with Chromebooks, laptops, tablets, or phones. You can also connect via 3.5 mm audio-in or play from a USB drive using the USB-A port. The rear 1/4" MIC/GUITAR input supports wired microphones or an instrument for events and presentations. USB-A can also charge a phone during use.

Best use cases

• School events, assemblies, dances, and pep rallies
• Gym / PE programs and outdoor learning
• Classroom or media-lab audio for lessons and videos
• Karaoke, talent shows, and after-school activities
• Portable PA-style sound where outlets aren’t guaranteed

Buyer notes

• Lighting optional: Lights can be turned off for instruction-first environments.
• Big-sound portability: Four integrated handles make it easier to move between rooms and venues.
• Mic not included: Add a compatible wired mic (or Sony ULT wireless mics) if karaoke/presentations are needed.

Purchasing for schools and districts

Learning Headphones supports purchase orders, tax-exempt checkout, and volume pricing. If you’re building event kits or portable sound systems for campuses, our team can help confirm the right ULT speaker + microphone setup for your spaces.