Overview
Sony ULT FIELD 1 is a compact, battery-powered Bluetooth speaker in Sony’s bass-focused ULT lineup. This page focuses on the FIELD 1 rather than treating all ULT speakers as interchangeable: larger models offer different output levels, features, and prices. The FIELD 1 is designed for everyday portable listening, with an adjustable carrying strap and a body that can stand vertically or lie horizontally. Its ULT button switches on a stronger bass presentation without requiring you to open an app.
The broad review consensus is that it delivers satisfying punch for its size, particularly with pop, hip-hop, and electronic music. However, its small enclosure still limits deep bass and room-filling output. RTINGS and Tom’s Guide describe a practical portable speaker whose appeal depends partly on whether you enjoy its bass-forward tuning. Sony’s companion app provides sound adjustment, making it worth experimenting with settings rather than assuming the default balance will suit every recording.
Who it's for
The FIELD 1 makes sense for someone who wants music in a kitchen, bedroom, backyard, or at a picnic without carrying a larger speaker. Its IP67 dust and water resistance is useful around sand, splashes, and unpredictable weather. The strap adds carrying and hanging options, while the relatively compact shape is easier to pack than Sony’s larger ULT models. A built-in microphone also lets it handle speakerphone calls, a feature some competing portable speakers omit.
It is less suitable for buyers seeking powerful outdoor party sound or genuinely deep bass. A single FIELD 1 plays in mono, so listeners who care about left-right separation should consider a compatible two-speaker setup or a different design. If your priority is tonal neutrality, compare it with alternatives and listen with ULT switched both on and off. Its strongest use case is convenient, close-range listening rather than replacing a home stereo.
Things to know before buying
Sony advertises up to 12 hours of battery life, but that is a conditional maximum rather than a guarantee for every volume level and sound setting. Loud playback and bass enhancement can reduce endurance. Charging uses USB-C; this is not a substitute for a wired audio input. There is no 3.5 mm auxiliary input or Wi-Fi streaming, so plan around Bluetooth playback from a phone, tablet, or computer.
Check the exact model on each retailer listing, especially when searching the broader phrase “Sony ULT speakers.” Confirm that the offer is for a new FIELD 1, not a larger model, refurbished unit, accessory, or empty case. Compare delivered prices, return policies, and seller warranty coverage. Discounts can make it competitive with the JBL Flip 6, but battery needs, tuning preferences, and pairing limitations matter more than a small price difference.