Sony ULT FIELD 3 vs Anker soundcore Boom 3i

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ULT FIELD 3 compared with Boom 3i

	SonyULT FIELD 3	Anker soundcoreBoom 3i
Overview
Released
Released	April 2025	June 2025
Sound
Type
Type	Portable speaker	Portable speaker
Dolby Atmos
Dolby Atmos	No	No
Drivers
Drivers	One woofer (about 86 × 46 mm) and one tweeter (about 20 mm), with side passive radiators	3.7 × 2-inch woofer, 0.65-inch tweeter and two passive bass radiators
Amplifiers
Amplifiers	–	50 W total; 40 W woofer and 10 W tweeter
Frequency response
Frequency response	–	56 Hz – 20 kHz
Audio formats
Audio formats	–	SBC and AAC over Bluetooth
Room tuning
Room tuning	ULT button for ULT POWER SOUND bass boost (on or off); Sound Field Optimization; 7-band custom equaliser in the app	BassUp 2.0 bass enhancement and custom EQ in the app
Connections
Wi-Fi
Wi-Fi	No	No
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	No
Voice assistants
Voice assistants	None	None
Bluetooth
Bluetooth	Bluetooth 5.2; SBC and AAC; A2DP, AVRCP, HFP, HSP and SPP; multipoint connection to two devices; Google Fast Pair	Bluetooth 5.3
Ports
Ports	USB-C for charging in and out (can charge a phone at 5 V, up to 1.5 A); not for audio	USB-C charging input; no charging output or wired audio input
Multi-room
Multi-room	Stereo Pair with a second ULT FIELD 3; Party Connect with compatible Sony speakers	TWS pairing of two Boom 3i speakers for left/right stereo
App
App	Sony | Sound Connect	Soundcore app for EQ, BassUp, lighting, firmware updates, recorded voice-message playback, emergency alarm and Buzz Clean vibrations to dislodge debris. The maker recommends current firmware for improved sound; SoundGuys tested firmware 01.20
Design
Battery life (maker's claim)
Battery life (maker's claim)	Up to 24 hours	Up to 16 hours
Water and dust resistance
Water and dust resistance	IP67	IP68
Weight
Weight	1.2 kg	0.78 kg (better)
Battery life detail
Battery life detail	About 24 hours at volume 22 of 50 with ULT POWER SOUND on; about 5 hours at maximum volume; about 3.5 hours to charge with a 9 V 3 A USB PD adaptor; 10 minutes of charging gives about 120 minutes of playback; Battery Care mode limits charge to about 90%; STAMINA mode for longer playback	Up to 16 hours, dependent on volume and content; charge in under 4 hours with 5 V / 3 A USB-C input
Controls
Controls	Buttons for power, Bluetooth/Stereo Pair, CONNECT (Party Connect), play/call, volume and ULT; battery and Battery Care button behind the cap	Physical playback, volume, power, Bluetooth, lighting and BassUp controls; holding BassUp for 5 seconds activates a 96 dB emergency alarm
Microphones
Microphones	Built-in omnidirectional MEMS microphone for hands-free calls	–
Mounting
Mounting	Detachable shoulder strap	Detachable shoulder strap; designed to float upright. Maker rates immersion at 1.5 m for 30 minutes, drop resistance at 1 m and salt-spray resistance at 240 hours under ASTM G85-equivalent test conditions
Size
Size	256 × 113 × 79 mm (W × H × D)	Approximately 21.0 × 8.5 × 7.8 cm; US maker lists 780 g, while the Japanese maker lists approximately 825 g including the strap
Colours
Colours	Black, Off White, Forest Grey	Adventurer Black, Deep Ocean Blue, Jungle Green and Brown on the UK store
In the box
In the box	Speaker, shoulder strap, USB-C to USB-C cable	Speaker, shoulder strap, USB-C to USB-C cable and quick start guide