Sony has been an industry leader in portable sound for decades and is renowned for creating speakers that meet the needs of audio quality, fashion, and ruggedness. In 2025, Sony increased its ULT series—or “Ultimate” series—with two high-performance portable Bluetooth speakers: the Sony ULT Field 3 and Sony ULT Field 5. They’re both built to provide bass-forward sound, hard-wearing build quality, and intelligent features optimized for party and outdoor use. Yet, though they’re genetically the same, they appeal to slightly different crowds. So, which one is best for you? Let’s get into a thorough comparison of the Sony ULT Field 3 vs. Field 5, including their design, performance, battery life, and more.
Design and Build Quality
Both the ULT Field 3 and Field 5 feature Sony’s characteristic rugged design, with form and function blending together beautifully. These are rugged, practical, and stylish cameras designed for the great outdoors. Sony’s ULT Field 3 has a small, cylindrical body and has a removable shoulder strap. Its IP67 rating gives it the ability to withstand water, dust, and even rust, making it ideal for sessions by the pool, hiking in the mountains, or beach days. The aesthetic language is simple yet rugged, and the rubberized texture provides a firm grip even when damp.
Conversely, the Sony ULT Field 5 raises the bar. It is slightly bigger and more durable with added stereo speakers, improved grille protection, and a 360° Party Light system with adjustable RGB illumination. The construction is just as tough with the IP67 rating, but it’s better suited for fixed applications—perfect for parties in the home or in the great outdoors instead of being moved around all the time.
If portability is your number one requirement, the ULT Field 3 is the winner. But if you’re looking for a show-stopping center of attention for your gatherings, the Field 5 takes the crown.
Sound Performance
Sound is where Sony shows its technical muscle. Both speakers have Sony’s exclusive ULT mode, enabled with one button press to amplify low-end frequencies and produce that iconic “club-like” boom. The Sony ULT Field 3 sports a mono driver configuration, but don’t be misled—it delivers great clarity and volume for its compact size. ULT mode bass boost makes EDM, pop, and hip-hop songs sound punchy, with the mids being fairly balanced. It’s ideal for small- to medium-sized areas or solo use outdoors.
While the Sony ULT Field 3 is effective, the Sony ULT Field 5 is in a class by itself. It features dual drivers for stereo sound, which yields a far more expansive and encompassing soundstage. Vocals are more natural-sounding, instruments are more distinct, and the bass booms deeper and cleaner. The end result is a deep, full-range audio presentation that has no trouble filling a big room or open yard.
Bottom line:
Field 3 → Portable, punchy sound with mono setup.
Field 5 → Louder, wider, and more refined stereo performance.
If you’re an audiophile or plan to host parties, the Field 5 is the better investment. For casual outdoor listening, the Field 3’s sound is more than satisfying.
Battery Life and Charging
Battery life is another strong suit for both models. The Sony ULT Field 3 offers up to 24 hours of playback from one charge—a feat for its compact size. Actual use with ULT mode enabled and volume set above 70% usually gets it to around 18–20 hours, still a great amount for a day out. It is also USB-C fast charging-enabled, offering multiple hours of playback after a quick top-up.
The Sony ULT Field 5, with its bigger battery, provides similar stamina but sips quicker when lights and ULT mode are both on. In ideal conditions (lights off, half volume), it will last for 24 hours too, but party modes with the RGB lights on might cut that to about 12–14 hours. They both have quick charging and Sony’s Battery Care feature that allows for longevity by stopping short of overcharging.
Connectivity and Controls
Both the speakers are equipped with Bluetooth 5.x connectivity, providing low latency and a reliable connection. Pairing is also effortless across Android, iOS, and Windows platforms. Sony’s Music Center app and Fiestable app offer additional controls—you can adjust the EQ, enable ULT mode, control lights (on the Field 5), and monitor battery life.
Voice assistant support is provided as well, and both of these models can be connected in tandem with Sony’s Party Connect feature for coordinated playback on a set of speakers. The ULT Field 3 has simplicity as its theme—few buttons, a ULT bass boost switch, and volume/playback controls. The ULT Field 5 throws in lighting controls and a slightly longer top panel for personalization.
Durability and Outdoor Use
Sony has designed both speakers to withstand rough conditions. The IP67 rating ensures full protection from dust and water—you can actually dunk them for a short time without any problems. Sony also boasts shock resistance, so they are perfect travel buddies for hiking, pool parties, and road trips.
The Field 3, being light and smaller, is more convenient to carry along on adventures. The strap that comes with it allows you to suspend it from a backpack or bike. The Field 5, though more durable, is heavier and is best used in more sedentary situations like beach parties or home gatherings.
Additional Features
This is where Field 5 begins to earn its higher cost: RGB Party Lights with 360° coverage — excellent for visual ambiance. Stereo pairing for an even more engaging sound experience. App-based personalization for lights and audio.
The Field 3 simplifies things but still has the same ULT bass mode, access to voice assistant, and Party Connect feature. It’s a purist option — serious audio without added bells and whistles.
Price and Value—serious
In India, the Sony ULT Field 3 is priced around ₹24,990, while the Sony ULT Field 5 costs approximately ₹35,990. Both carry premium price tags but offer great value considering Sony’s build quality, longevity, and brand reliability.
The price difference is worth it for the Field 5’s superior sound, stereo output, and lighting capabilities. If you just need portability, water resistance, and good sound, the Field 3 is the better value. If you want to be surrounded by quality stereo sound and be buried in party vibes, the Field 5 is worth the upgrade.
Pros and Cons Overview
Sony ULT Field 3 – Pros:
- Lightweight, durable, IP67 rated
- Bigger-than-expected sound for its size
- Enduring battery life
- Portable with strap
- Punch provided by bass boost (ULT mode)
- Sony ULT Field 3 – Drawbacks:
- Mono sound, no stereo effect
- Fewer features than Field 5
- Sony ULT Field 5 – Advantages:
- Stereo sound for surround-style listening
- RGB lighting and app settings
- Ideal for parties and groups
- Powerful, dynamic bass response
- Sony ULT Field 5 – Disadvantages:
- Not as portable, heavier weight
- Shorter battery life with lights and ULT mode
- More expensive price
Which One Should You Buy?
Ultimately, the decision comes down to how and where you will use the speaker.
Select the Sony ULT Field 3 if you’re an outdoor enthusiast or a frequent traveler looking for a rugged, portable, and long-lasting speaker. It’s perfect for solo listening, hiking, or being outdoors.
Select the Sony ULT Field 5 if you enjoy having parties or desire a stronger, stereo sound with party lights and enhanced bass. It’s the superior choice for social parties and bigger rooms.
Final Verdict
Sony’s ULT lineup really embodies the essence of “Ultimate Sound for Every Field.” Both the Sony ULT Field 3 and Sony ULT Field 5 are incredible Bluetooth speakers for different living styles.
If you’re looking for portability, endurance, and ruggedness, go for the ULT Field 3. But if you crave power, stereo clarity, and party-ready features, the ULT Field 5 will make every moment sound larger than life.
Whichever you choose, Sony ensures one thing—pure, powerful sound that travels with you anywhere.
