Choosing the right Bluetooth speaker in 2025 can be tricky with so many options claiming great sound and value. Whether you’re after portability, durability, or price, we’ve gathered expert insights to help. Before you decide, read this review to see if the SONY ULT Field 1—or another speaker—is still the best choice for your needs.
The SONY ULT Field 1 speaker offers a massive bass and 12 hours of playtime. It features hands-free calling with a built-in microphone that has echo-canceling technology for clear calls. With an IP67 rating, this speaker is waterproof, rustproof, and dustproof, making it ideal for outdoor use. Its compact and easy-to-carry design includes a detachable multi-way strap for portability.
Key Features & Specs
Sound & Power: It’s driven by a front-firing tweeter and woofer, along with passive radiators on both ends, delivering 360° sound. Its signature feature is the illuminated “ULT” button—hit it to instantly activate louder, bassier playback without distortion. The sound is clean and punchy for indoor or outdoor listening, though cranking volume to max may introduce slight distortion .
Design & Durability: This speaker is built like a tank. Its cylindrical body wrapped in rugged mesh, rubberized caps, and a thick paracord strap feels made for the outdoors. Sony even tested it for saltwater resistance, and its IP67 rating means it’s fully submersible and dustproof
Battery Life & Charging: Sony advertises up to 12 hours of playback; real-world use at 50% volume and with ULT mode active yields around 10–12 hrs, but pushing volume lower battery life to about 5–6 hrs Charging is slow (around 5 hrs for a full charge) but supports 10-minute quick charge for 3 hours of playback
Bluetooth & Connectivity: Uses Bluetooth 5.3, supporting SBC and AAC. Pairing is fast (Android Fast Pair included), but sadly, there are no aux inputs or voice-assistants built-in
App & EQ: The Sony Music Center app offers firmware updates, stereo-pair setup, basic 3-band EQ, and Power-saving (Stamina) mode—but it won’t let you tweak beyond presets.
Portability & Controls: Weighing about 0.6 kg, it’s easy to travel with. Physical buttons on top control power, playback, volume, Bluetooth, call handling, and ULT mode. There’s also an auto power-off if left idle
Expert Reviews & Star Ratings
SoundGuys
“A decent on‑the‑go, lightweight but rugged adventure‑ready speaker… lacklustre companion app aside.”
6.8 / 10 (~3.4★)
What Hi‑Fi?
“Very well‑made… shock‑proofing and IP67 build feels built to last.”
4.0 / 5
Rtings.com
“Balanced sound for its size… ULT mode adds bass but overall just okay. Mono output and compression at max volume hold it back.”
6.5 / 10 (~3.3★)
Tom’s Guide
“Packs a surprising punch for its size… a strong contender for travel adventures.”
4.0 – 4.5 / 5
My Mobile India
“Rich immersive sound, rugged design, up to 16 h battery—though app options are limited.”
4.0 / 5
91Mobiles
“Portable, bass‑heavy profile… weighs more than Flip 6 but holds well for outdoor use.”
4.0 / 5
✅ Pros & Cons Summary
✅ Pros
- Strong bass with ULT mode
- Fully waterproof & dustproof (IP67)
- Rugged, outdoor-friendly design
- Quick charge (10 min = 3 hrs playback)
- Lightweight and portable
- Bluetooth 5.3 with Fast Pair
- Stereo pairing supported
⚠️ Minor Drawbacks
- Mono sound output
- Slow full charging (about 5 hrs)
- Limited app features
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