Sony ULT Field 7

Name: Sony ULT Field 7
Brand: Sony
SKU: 31715

Manufacturer: Sony

The Sony ULT Field 7 is a large-format portable speaker built for outdoor use, featuring an IP67 ingress protection rating that makes it both dust-tight and submersion-resistant. With four drivers, stereo output, and a passive radiator, it is designed to deliver broad sound coverage in open environments. Wireless operation via Bluetooth 5.2 is complemented by an AUX input for wired connectivity, and the speaker supports multipoint pairing with up to two devices simultaneously.

On the power side, the ULT Field 7 carries a 5200 mAh rechargeable battery rated for 30 hours of playback, and it charges via a dedicated port rather than USB-C. Codec support includes LDAC and AAC, catering to higher-resolution wireless audio streams. Additional features include fast pairing, voice prompts, a sleep timer, stereo pairing with a compatible second unit, and a detachable cable. The unit weighs 6300 g and measures 512 mm wide, placing it firmly in the category of stationary or transported-by-hand outdoor speakers rather than compact carry-on devices.

Pros

IP67 rating means it is fully dust-tight and can handle temporary submersion, making it well-suited for outdoor and wet environments
30 hours of battery life on a single charge reduces the need for frequent recharging during extended use
Supports multipoint pairing with up to two devices simultaneously, allowing easy source switching
LDAC codec support enables higher-resolution wireless audio streaming compared to standard Bluetooth codecs
Stereo pairing allows two units to be linked together for a wider stereo soundstage
Fast pairing simplifies the Bluetooth connection process, and smartphone remote control adds hands-free convenience

Cons

At 6300 g and 512 mm wide, the speaker is heavy and bulky, limiting genuine portability
No battery level indicator means there is no on-device way to check remaining charge at a glance
Wireless charging is not supported, and the unit does not charge via USB-C, which may complicate cable compatibility
No travel bag is included despite the large size, making transportation less convenient
Bluetooth range is limited to 10 m, which restricts usable distance in open outdoor settings
No 3.5 mm headset jack is available, limiting wired audio input options to the AUX input only

Who is this for?

This speaker is well-suited to users who regularly use it in outdoor or demanding environments, given its IP67 dust and water resistance rating that allows it to handle rain, poolside splashes, or dusty conditions without issue. Its 30-hour battery life makes it a practical choice for extended outdoor gatherings, camping trips, or all-day events where access to power is limited. Users who stream from multiple devices will also benefit from the dual-device multipoint pairing and LDAC codec support, making it a reasonable fit for those who prioritize higher-quality wireless audio in stationary outdoor or indoor settings.

Who is this NOT for?

At 6300 g and 512 mm wide, this speaker is not a good fit for users looking for something easy to carry on the move, as its size and weight make true portability impractical. Those who rely on quick visual battery checks will find the lack of a battery level indicator frustrating during longer sessions. It is also not well-suited for users who need wide-area wireless coverage, since the 10 m Bluetooth range is relatively short for large open spaces, nor for those who require USB-C charging or aptX codec compatibility, as neither is supported.

Design:

Ingress Protection (IP) rating	IP67
volume	25460.736 cm³
drivers count	4
has a neodymium magnet	✕
control panel placed on a device	✓
water resistance	Water resistant
travel bag is included	✕
has a touch screen	✕
has RGB lighting	✕
has a detachable cable	✓
is a neckband speaker	✕
has a remote control	✕
weight	6300 g
height	224 mm
width	512 mm
thickness	222 mm

The Sony ULT Field 7 has a substantial physical footprint, measuring 512 mm wide, 224 mm tall, and 222 mm thick, with a total volume of 25460.736 cm³ and a weight of 6300 g, placing it squarely in the category of transportable rather than truly portable speakers. It carries an IP67 ingress protection rating, confirming full dust resistance and the ability to withstand temporary submersion in water. The enclosure houses four drivers and includes a control panel mounted directly on the unit, along with a detachable cable for added convenience. It does not include a travel bag, remote control, touch screen, RGB lighting, or a neodymium magnet.

Sound quality:

has stereo speakers	✓
has a subwoofer	✕
highest frequency	20000 Hz
lowest frequency	20 Hz
Has a passive radiator	✓
has a noise-canceling microphone	✕
has a magnetic shielding	✕

The ULT Field 7 delivers stereo sound across a frequency range spanning 20 Hz to 20000 Hz, covering the full extent of the standard audible spectrum. It incorporates a passive radiator to reinforce low-frequency output without relying on a dedicated subwoofer, which is not included. The speaker does not feature a noise-canceling microphone or magnetic shielding.

Power:

battery power	5200 mAh
Battery life	30 hours
has a battery level indicator	✕
has a rechargeable battery	✓
has a removable battery	✕
has wireless charging	✕

The ULT Field 7 is equipped with a built-in rechargeable battery rated at 5200 mAh, providing up to 30 hours of playback on a single charge. The battery is not removable and does not support wireless charging, so recharging is done via a wired connection. There is no battery level indicator on the unit to display remaining charge status.

Connectivity:

multipoint count	2
Bluetooth version	5.2
supports Bluetooth pairing using NFC	✕
has a socket for a 3.5 mm audio jack	✕
has an AUX input	✓
has aptX Lossless	✕
has LDAC	✓
has aptX Adaptive	✕
has aptX HD	✕
has aptX	✕
has aptX Low Latency	✕
has AAC	✓
has AirPlay	✕
maximum Bluetooth range	10 m
supports Wi-Fi	✕
USB ports	1
Has USB Type-C	✕
has a 3.5mm male connector	✕
has an external memory slot	✕
is DLNA-certified	✕
supports Ethernet	✕
has a microphone input	✓

The ULT Field 7 connects wirelessly via Bluetooth 5.2 with a maximum range of 10 m and supports multipoint pairing with up to two devices at once. Supported audio codecs include LDAC and AAC, while aptX in all its variants, AirPlay, NFC pairing, and Wi-Fi are not available. For wired connectivity, the speaker offers an AUX input and a microphone input, along with one USB port, though it does not use USB Type-C and lacks a 3.5 mm male connector or a 3.5 mm headset jack. There is no external memory slot, and the unit does not support DLNA, Ethernet, or act as a DLNA-certified device.

Features:

Can be used wirelessly	✓
supports a remote smartphone	✓
has fast pairing	✓
has voice commands	✕
Has a radio	✕
Has voice prompts	✓
has a mute function	✕
works as a power bank	✕
has a sleep timer	✓

The ULT Field 7 supports wireless operation and can be controlled remotely via a smartphone, making it straightforward to manage playback without interacting with the unit directly. It includes fast pairing for quicker Bluetooth connection setup, as well as voice prompts to provide audible feedback during use. A sleep timer is also available, allowing the speaker to power down automatically after a set period. The unit does not support voice commands, radio reception, or a mute function, and it cannot be used as a power bank to charge other devices.

Miscellaneous:

supports pairing for stereo sound	✓

The ULT Field 7 supports stereo pairing, allowing it to be paired with a compatible second unit to create a stereo sound setup.

Final Verdict

The Sony ULT Field 7 is a large-format portable speaker that makes a clear case for itself in outdoor and extended-use scenarios, anchored by its IP67-rated build and 30-hour battery life. Its support for LDAC, dual-device multipoint pairing, and stereo pairing mode add meaningful versatility for users who want reliable wireless audio with some flexibility in how they connect and configure the setup. That said, its considerable weight and dimensions mean it is better thought of as a transportable unit than a truly carry-anywhere speaker, and the absence of USB-C charging and a battery indicator are practical gaps worth noting. For users whose priority is durability and long session endurance in a fixed or semi-fixed outdoor environment, the ULT Field 7 delivers a well-specified package — but those seeking genuine portability or broader connectivity options may find its trade-offs harder to overlook.