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Sony ULT FIELD 1 Speaker
Key Features
ULT Button for Bass Boost
Dual Passive Radiators
3.3 x 1.7″ Woofer & 0.6″ Tweeter
Dust, Water, Shock & Rust-Resistant
Up to 12 Hours of Battery Life
Built-In Mic for Hands-Free Calls
Microphone Echo Cancellation
Bluetooth Fast Pair
Pair Two for Stereo Sound
1 Year Warranty
Ultimate Sony ULT FIELD 1 Review: Extreme Bass in a Rugged, Go-Anywhere Body
Are you looking for a compact travel speaker that delivers deep, chest-thumping bass, stands up to the elements, and drops into your backpack cup holder effortlessly? The Sony ULT FIELD 1 Speaker establishes a new benchmark in the portable wireless audio market. Representing the pinnacle of Sony’s ULT POWER SOUND series , this rugged speaker is specifically engineered to deliver massive low-end energy from a handheld design.
This comprehensive, clean review breaks down the exact technical hardware upgrades, digital features, and environmental protections to help you decide if it is the perfect audio companion for your active lifestyle.
Technical Specifications Overview
Sony has packed high-output acoustic drivers, flexible multi-way tracking, and a dedicated low-end frequency processor into a highly mobile frame.
| Feature | Specification Details |
|---|---|
| Acoustic Driver Array | 1 x 83mm x 42mm Woofer, 1 x 16mm Tweeter |
| Passive Radiators | Dual Side-Firing Passive Bass Radiators |
| Sound Optimization Mode | Dedicated ULT Button (Deep Bass boost profile) |
| Environmental Protection | Fully IP67 Certified Dustproof, Waterproof, and Salt-Water Proof |
| Shock Resistance | Shockproof (Survives drops from up to 1.22 meters) |
| Wireless Connection Protocol | Bluetooth 5.3 with Fast Pair support |
| Continuous Playtime Stamina | Up to 12 Hours of total battery life |
| Physical Utility System | Detachable Multi-Way Smart Strap Included |
| Physical Weight Profile | Lightweight 0.65 kg (1.43 lbs) |
Key Performance Upgrades
The ULT Button: Mind-Blowing Bass Expansion
The absolute defining feature of this speaker is its dedicated, physical ULT button . Toggling this button activates a specialized digital processor that dramatically expands low-end frequency response. Backed by a powerful woofer and dual side-firing passive radiators , it pushes forward an incredibly warm, punchy, and highly vibrating sub-bass kick that breathes life into hip-hop, electronic, and rock playlists.
High-Output 2-Way Driver Layout
Unlike traditional compact cylinders that pass their entire frequency spectrum through a single full-range driver, the ULT FIELD 1 incorporates a true 2-way acoustic system . It splits the labor cleanly between a large woofer and a dedicated 16mm high-frequency tweeter . This physical hardware separation ensures that while the woofer handles heavy low-end tracking, vocal tracks stay crystal clear and high-pitched instruments never sound muffled or distorted.
Military-Grade Shockproofing and Salt-Water Sealing
Built to comfortably survive extreme adventure layouts, the entire housing carries an ironclad IP67 certified rating . The structural casing completely locks out fine trail dust, beach sand, and pool splashes. Going further than standard outdoor travel models, the ULT FIELD 1 is specifically salt-water proofed to resist ocean corrosion and holds a certified shockproof frame layout to absorb drops and tumbles onto hard ground easily.
Next-Gen Smart Features and App Control
The internal wireless framework removes daily operation friction while expanding multi-device flexibility.
- Echo-Cancelling Communication Microphone: The unit houses an optimized internal microphone array featuring high-quality Echo Cancelling technology . This allows two people to speak simultaneously on a personal chat or conference call without cutting each other off, making it a highly capable mobile speakerphone.
- Sony Music Center Custom App EQ: Connect your speaker directly to the official mobile application to fully unlock your hardware. From there, you can design custom sound profiles, toggle a graphic equalizer to trim the treble, or check exact battery statistics.
- Multi-Way Multi-Position Smart Strap: Weighing a manageable 0.65 kg , the speaker can be placed either vertically or horizontally to match limited table spaces. It features a clever, detachable multi-way strap that lets you hang the device from backpack lines, tent clips, or tree branches cleanly during transit.
- Stereo Pair Wireless Linking: Want to fill a larger outdoor venue? You can wirelessly sync two matching ULT FIELD 1 units via the app to create a wide, true left-and-right wireless stereo soundstage.
