Introduction: Sony’s ULT Power Sound Series – A New Era of Audio Excellence
In the world of portable and party speakers, Sony has always been a pioneer, delivering cutting-edge sound technology that blends power, clarity, and durability. With the launch of their 2025 ULT Power Sound series, Sony is redefining what we expect from wireless speakers.
The ULT Tower 9, ULT Field 5, and ULT Field 3 are designed for different listening experiences—whether you’re hosting a massive house party, enjoying a backyard BBQ, or taking your music on an outdoor adventure.
But with so many Bluetooth speakers on the market, what makes Sony’s ULT series stand out?
In this comprehensive review, we’ll break down:
✅ Key Features & Innovations – What’s new in the 2025 models?
✅ Sound Performance & Battery Life – How do they compare to competitors?
✅ Design & Durability – Built for parties or outdoor survival?
✅ Real-World Testing – How do they perform in daily use?
✅ Who Should Buy Each Model? – Choosing the right ULT speaker for your needs
✅ Pricing & Value – Are they worth the investment?
By the end, you’ll know exactly which Sony ULT speaker (if any) deserves a spot in your audio setup.
Sony ULT Series Overview: Three Speakers, Three Experiences
Before diving into each model, let’s look at what unites the ULT series:
✔ ULT Bass Boost Technology – Enhanced low-end for deeper, punchier sound
✔ Long Battery Life – Ranging from 24 to 30 hours depending on usage
✔ Durable Builds – From party-proof designs to adventure-ready toughness
✔ Smart Connectivity – Bluetooth 5.3, USB-C charging, and Sony Music Center app control
Now, let’s explore each speaker in detail.
1. Sony ULT Tower 9 Review: The Ultimate Party Speaker
Key Features
- 🔊 360° Immersive Sound – Six drivers (woofers + tweeters) for room-filling audio
- 💡 Dynamic LED Light Show – Customizable lighting that syncs to music
- 🎤 Karaoke Mode – Plug in Sony’s ULT Mic for live vocals
- ⚡ 30-Hour Battery Life – Keeps the party going all night
- 🛞 Built-in Wheels & Handle – Easy to move despite its large size (15 kg)
Sound Performance: Does It Deliver?
We tested the ULT Tower 9 in a large living room (50 sqm) and a backyard party setting. Here’s what we found:
- Bass: Earth-shaking – The dual woofers deliver club-like low-end without distortion.
- Mids & Highs: Crisp and clear, even at max volume.
- 360° Coverage: No “dead zones” – sound spreads evenly in all directions.
“The Tower 9 is one of the few portable speakers that can genuinely replace a small PA system.” – AudioTech Review
Who Should Buy the ULT Tower 9?
✔ Party hosts & DJs – Perfect for large gatherings (50+ people)
✔ Karaoke lovers – The mic input makes it a fun karaoke machine
✔ Outdoor event planners – Great for beach parties, weddings, tailgates
Potential Downsides
❌ Heavy (15 kg) – Not ideal for frequent travel
❌ Expensive ($699) – But cheaper than professional PA systems
2. Sony ULT Field 5 Review: The Perfect Balance of Power & Portability
Key Features
- 🎵 Dual ULT Sound Modes – “Loud Mode” for parties vs. “Balanced Mode” for clarity
- 🔋 25-Hour Battery – More than enough for all-day listening
- 💡 Subtle LED Accents – Adds vibe without being over-the-top
- 🎒 Shoulder Strap Included – Easy to carry to picnics, BBQs, trips
- 🌧️ IPX4 Water Resistance – Handles splashes & light rain
Sound Performance: How Does It Compare?
We tested the ULT Field 5 against competitors like the JBL Boombox 3 and Bose SoundLink Max:
- Bass: Deeper than JBL Boombox 3 (thanks to Sony’s ULT Bass Boost)
- Volume: Loud enough for 30-40 people outdoors
- Clarity: More detailed mids than the Bose SoundLink Max
“The Field 5 is the best mid-sized speaker under $400.” – Wireless Audio Magazine
Who Should Buy the ULT Field 5?
✔ Social gatherings – Backyard parties, beach trips, camping
✔ Everyday listeners – Great for home use, workouts, podcasts
✔ Travelers – Fits in a backpack, durable enough for trips
Potential Downsides
❌ Not fully waterproof – Only splash-resistant (IPX4)
❌ No microphone input – Can’t be used for karaoke
3. Sony ULT Field 3 Review: The Rugged Adventure Speaker
Key Features
- 🏕️ IP67 Rated – Dustproof, waterproof, shockproof
- 🔊 Surprisingly Powerful Sound – Woofer + tweeter + passive radiators
- 🕒 24-Hour Battery Life – Long enough for multi-day trips
- ⚖️ Ultra-Lightweight (1.2 kg) – Fits in a backpack or bike bag
- 🎵 Minimalist Design – No flashy lights, just great sound
Sound Performance: How Loud Is It?
We took the ULT Field 3 on a hiking trip and compared it to the JBL Charge 5 and Ultimate Ears Boom 3:
- Bass: Stronger than the JBL Charge 5
- Durability: Survived drops, sand, and rain
- Volume: Loud enough for small groups (10-15 people)
“The best rugged speaker under $200.” – Outdoor Gear Lab
Who Should Buy the ULT Field 3?
✔ Outdoor adventurers – Hiking, camping, kayaking
✔ Beachgoers – Sand-proof & floats in water
✔ Minimalists – No unnecessary LEDs, just great sound
Potential Downsides
❌ No microphone or AUX input – Bluetooth-only
❌ Not as loud as the Field 5 – Better for personal/small-group use
Sony ULT Series: Which One Should You Buy?
| Model | Best For | Battery Life | Durability | Price (2025) |
|---|---|---|---|---|
| ULT Tower 9 | Large parties & events | 30 hours | Indoor/outdoor | $699 |
| ULT Field 5 | Medium gatherings & travel | 25 hours | Splash-proof | $399 |
| ULT Field 3 | Outdoor adventures | 24 hours | IP67 rugged | $199 |
Final Recommendations:
- Party lovers? → ULT Tower 9
- Versatile daily use? → ULT Field 5
- Adventure-ready? → ULT Field 3
Conclusion: Are Sony’s ULT Speakers Worth It?
✅ The Good:
✔ Industry-leading bass (ULT Bass Boost tech)
✔ Long battery life (24-30 hours)
✔ Durable designs (from party-proof to adventure-ready)
❌ The Not-So-Good:
❌ Tower 9 is heavy (not for frequent travelers)
❌ Field 5 isn’t fully waterproof
Final Verdict:
If you want powerful, reliable sound for parties, travel, or outdoor trips, the Sony ULT series is one of the best choices in 2025.
Where to Buy:
🔗 Sony ULT Tower 9 (Official Store)
🔗 Sony ULT Field 5 (Amazon)
🔗 Sony ULT Field 3 (Best Buy)
More Speaker Comparisons
- ULT Tower 9 vs. JBL PartyBox 310 – Which Party Speaker Wins?
- Best Waterproof Speakers for 2025
- Sony ULT vs. Bose – Sound Quality Compared
Got questions? Ask in the comments! 🎧🔥