soundcore Boom Go 3i | Portable Bluetooth Speaker with Powerful Bass

The Boom Go 3i is a compact, palm‑sized rectangular Bluetooth speaker with a rubber‑coated, impact‑resistant housing and a weight of about 380 grams. It charges via USB‑C and uses a 4800 mAh internal battery that delivers over 24 hours of playback. This same battery supports reverse‑charging, allowing the speaker to act as an emergency power bank. The unit is rated IP68, making it fully dustproof and capable of surviving immersion, so it can be used safely in rain, by the pool, or at the beach. A built‑in display shows battery status and operating information. The USB‑C port is unusually left uncovered, and if water enters the connector, the display shows an “EC” warning until the port dries out.
The speaker features a flexible silicone strap with two mounting positions and a self‑locking mechanism, making it easy to attach to bicycles, backpacks, or similar items. Its control layout uses raised, textured buttons that are easy to locate by touch. These buttons manage volume and playback, including next‑ and previous‑track functions through double‑ and triple‑press inputs. Additional controls include the power button, Bluetooth pairing button, an Auracast button for linking multiple Boom Go 3i units, and a multifunction “M” button. The M button activates RGB lighting, cycles through lighting and colour modes with a double‑press, switches between BassUp, Normal, and Eco sound modes with a single press, and turns off the lighting when held for two seconds. An emergency SOS feature is also included: pressing the power button five times triggers a loud alert tone, which can be cancelled by pressing any tactile button.
The Soundcore app detects the speaker immediately and provides access to a nine‑band graphic EQ with four presets, including a Soundcore‑tuned option. The app also offers ambient soundscapes—such as ocean waves, rain, and thunder—that can be mixed or customised for sleep or relaxation. A “Voice Amplifier” mode allows the speaker to function as a portable megaphone for announcements or addressing groups.
This model uses a single full‑range dynamic driver as its main transducer, and the manufacturer does not specify the presence of a dedicated tweeter. I also observed one bottom‑firing passive radiator designed to enhance low‑frequency output. Bass performance remains fairly consistent even when the speaker is placed on soft surfaces such as a bed or a fabric couch. The manufacturer provides no details about supported Bluetooth codecs. Based on noticeable latency when paired with a TV and the absence of a low‑latency or gaming mode, it likely uses SBC or AAC with a mid‑tier Bluetooth SoC rather than High‑resolution codecs such as aptX Adaptive, aptX HD, aptX Low Latency, or LDAC. Compared with speakers like the Bose SoundLink series, the Beatbox, and the BeoPlay A1, the Boom Go 3i sounds less crisp and less detailed. That difference is expected, as those models are engineered for broader acoustic performance and refined indoor listening, while the Go 3i is built to be compact, rugged, and optimised for outdoor use.
The Boom Go 3i is tuned specifically for outdoor environments, prioritising projection, durability, and high sound‑pressure output in open spaces. It is not optimised for indoor acoustics, where reflections and close‑range listening can significantly change the perceived sound. The tuning assumes far‑field listening distances beyond two metres rather than near‑field use at 0.5–1 metre. Indoors, this results in forward mids and highs that can sound slightly harsh, bass that may feel tight and boomy or noticeably thin, and an overall lack of warmth and natural tonal character. High‑fidelity or audiophile‑grade performance is not realistic for this device, but careful placement and EQ adjustments can reduce audio fatigue. Keeping the speaker away from corners helps prevent excessive bass buildup, and applying a warmer EQ curve—particularly by reducing upper mids around 2–5 kHz—can make the sound more comfortable. The speaker performs best outdoors and pairs well with portable projectors for watching movies and sports.