Short answer: these sit in different size classes, so this isn’t a straight ranking comparison. The Soundcore Boom Go 3i ranks #2 of 62 small speakers by sound quality; the Soundcore Motion 300 ranks #3 of 179 medium speakers. Pick based on size and features rather than a head-to-head sound quality gap.
Both speakers need an EQ tweak to sound their best. The Boom Go 3i’s cons describe it as a bit piercing and metallic with a peak around 10kHz, something Oluv’s EQ preset is said to slightly improve. The Motion 300’s cons are more specific: without an EQ adjustment, or pushing the top two treble bars to max, it’s very rolled off in the treble and would rank far lower than its EQ’d result. Neither speaker is tuned right out of the box.
The size difference shows up in the driver layout and bass. The Motion 300 uses two 50.8mm full-range drivers plus two passive radiators in true stereo, reaching 50Hz at -10dB with pros calling it pretty deep bass for the small size. The Boom Go 3i is mono, with a single 25mm tweeter and 42mm woofer plus passive radiators, and its cons note the bass knocks a bit at volume.
What the Soundcore Boom Go 3i adds: full IP68 sealing (submersion-rated, not just splash-resistant like the Motion 300’s IPX7), a USB-C power bank output the Motion 300 lacks, and roughly double the rated battery life at 24 hours versus 13.
What the Soundcore Motion 300 adds: true stereo sound, a 9-band EQ with adjustable frequency versus the Boom Go 3i’s simpler EQ, LDAC codec support, and per-orientation custom EQ profiles for standing, lying flat, or hanging placement.
Buy the Soundcore Boom Go 3i if you want the smallest, most rugged, longest-battery option and don’t mind a single-driver mono sound.
Buy the Soundcore Motion 300 if you can carry a slightly bigger speaker in exchange for stereo sound, deeper bass, and finer EQ control.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Soundcore Boom Go 3i | Soundcore Motion 300 | |
|---|---|---|
| Price | $59.98 | $79.99 |
| Ranked | #2 of 62 in Small Size Portable Bluetooth Speakers | #3 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 13 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, LDAC, SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes (9 band with adjustable frequency) |
| IP Rating | IP68 | IPX7 |
| Party Mode | Yes (Auracast) | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | Pointing up |
| TWS | Yes | Yes |
| Weight | 0.8 lbs (380 g) | 1.7 lbs (772 g) |
| Bluetooth Version | 6.0 | 5.3 |
| Amplifier Power | 15W | 30W |
| Dimensions | 4” x 4.2” x 1.8” (102.1 x 105.9 x 45.5 mm) | 7.9” x 3.6” x 2” (200 x 92 x 50 mm) |
| Drivers | 25mm tweeter + 42mm woofer + passive radiators | 2x 50.8mm (2”) full-range drivers + 2x passive radiators |
| Maximum SPL | 92dB (Manufacturer specified) | 101dB (measured by Alan Ross Reviews) |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | - |
| Bass Extension (-10dB) | - | 50Hz |
| Bluetooth Latency | - | 216ms ldac, 200ms aac, 116ms sbc |
| Frequency Response | - | 65Hz - 40kHz (Manufacturer specified) |
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