Consumer Electronics
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October 26, 2026

Sony ULT FIELD 1: Portable Listening with a Stereo Option

A compact Bluetooth speaker for room-to-room listening, with charge-only USB-C and an optional two-speaker stereo setup.

Sony ULT FIELD 1: Portable Listening with a Stereo Option

What You're Buying

The Sony ULT FIELD 1, model SRS-ULT10, is a rechargeable Bluetooth speaker for listening without leaving your phone beside a fixed sound system. Sony lists its weight at approximately 650 g, making it a practical option to consider when you move between a desk, kitchen and outdoor seating area.

How It Works

Pair a compatible Bluetooth audio device, then play your music through the speaker. The unit includes a woofer and tweeter, and supports the Sony | Music Center app. Its USB-C connection is for charging only, not a wired USB audio input.

Why We Chose It

The useful combination here is a manageable size, a supplied carrying strap and a rechargeable design. Sony specifies an IP67 rating and approximately 12 hours of battery life. Actual runtime depends on settings and use; follow the manufacturer's care instructions rather than treating water resistance as permission for unrestricted exposure.

What Sets It Apart

A second ULT FIELD 1 can add a separate left and right channel. Sony explains that two matching units connect through Music Center for Stereo Pair. This is an optional two-speaker arrangement, not stereo separation promised from one purchase. Check the exact model before planning a pair.

View Sony ULT FIELD 1 at Haiven.

Why We Recommend It

Consider it if carrying one speaker between listening spots matters more to you than building a fixed installation. If your plan depends on USB audio or a stereo pair from a single unit, those requirements do not match this setup.

Technical details: Sony SRS-ULT10 specifications. Pairing guidance: Sony's ULT FIELD 1 setup guide.