Soundcore Motion Boom Plus
By Soundcore · Portable Bluetooth Speakers · Audio & Electronics
- 80W total output from two 30W woofers and two 10W tweeters
- 20-hour playtime
- 13,400mAh battery capacity
- IP67 waterproof and dustproof rating
- Bluetooth 5.3
Lowest price seen
~$179.99 (approx.)
from $179.99 at Amazon
- Amazon ~$179.99 (approx.)View at Amazon
- SoundcoreView at Soundcore
- eBay (used) eBay: used, open-box, refurbishedView at eBay (used)
- eBayView at eBay
Prices are snapshots. Check the current price with the store.
Summary
A bass-forward, outdoor-ready portable Bluetooth speaker with 80W rated output, a 20-hour claimed battery and IP67 waterproofing — it floats, and PartyCast 2.0 syncs multiple units. The one thing to check before buying: no independent lab has published measurements of this model, so every spec is a manufacturer claim.
Strengths
- 80W rated output from two 30W woofers and two 10W tweeters, with BassUp bass enhancement.
- 20-hour claimed playtime from a 13,400mAh battery.
- IP67 dust and water resistance, and it floats — built for pool, boat and beach.
- Bluetooth 5.3, TWS stereo pairing for two units, and PartyCast 2.0 multi-speaker sync.
- The USB-A port doubles as a power bank via PowerIQ 2.0.
- The soundcore app offers 4 EQ modes and firmware updates.
Weaknesses
- No instrumented professional test exists — no third-party measurements of loudness, battery life at a set volume, or Bluetooth range.
- The 1.72 lb weight in the official spec table is implausibly low for an 80W speaker with a 13,400mAh battery; treat it as a listing error.
- The 80W output and 20-hour playtime are manufacturer ratings, not measured values.
- IP67 depends on the port cover staying sealed; the USB-C and USB-A ports are not waterproof when exposed.
- Pairing with older PartyCast 1.0 speakers requires a double-press of the PartyCast button.
- The warranty term is not confirmed — the product page references a “Hassle-Free Warranty” without stating its length.
Verified specifications
| Model | Soundcore Motion Boom Plus (A3129). |
|---|---|
| Output | 80W rated — two 30W woofers and two 10W tweeters. |
| Drivers | titanium tweeters, with BassUp real-time bass enhancement. |
| Playtime | 20 hours claimed. |
| Battery | 13,400mAh. |
| Water and dust resistance | IP67 — submersible and dustproof with the port covers sealed. |
| Floats on water | yes, per the manufacturer FAQ. |
| Bluetooth | 5.3. |
| Multi-speaker | TWS stereo pairing for two units, and PartyCast 2.0 for syncing more. |
| Built-in microphone | yes. |
| USB-A power-bank output | yes, via PowerIQ 2.0. |
| Aux input | 3.5 mm. |
| App | soundcore app, with 4 EQ modes and firmware updates. |
| Charging | USB-C at 5V/3A; a full recharge takes 5.5 hours. |
| Weight | 1.72 lb per the official spec table — likely a listing error, see Weaknesses. |
| Strap | detachable, included. Handle: built-in. |
| Voice prompts | yes, and they can be disabled in the app. |
Full research notes and sources
Sound and bass
The Motion Boom Plus pairs two 30W woofers with two 10W tweeters for a rated 80W output, and uses Soundcore’s BassUp technology for real-time bass enhancement. The titanium tweeters and BassUp processing are the main sound features. What nobody can tell you is how it measures: no instrumented test exists, so there is no third-party loudness figure and no independent judgment of how BassUp shapes the sound at high volume. The 80W number is a manufacturer rating, not a measured value.
Battery and charging
The 13,400mAh battery is rated at 20 hours of playtime. That figure is a manufacturer claim at unspecified volume and EQ settings; no independent test has measured it. Charging runs over USB-C at 5V/3A and takes 5.5 hours for a full recharge. The USB-A port with PowerIQ 2.0 lets the speaker double as a power bank for your phone. If the speaker has been sitting in a closet, charge it for at least an hour before use to avoid over-discharging the battery. If it misbehaves, a reset is holding Bluetooth + Volume+ for 5-8 seconds.
Water, dust and multi-speaker pairing
IP67 means the speaker is dustproof and submersible, and it floats — a practical combination for pool, boat and beach. The catch is the port cover: the USB-C and USB-A ports are not waterproof when exposed, so the seal has to stay closed around water. For multi-speaker setups, TWS pairs two units in stereo and PartyCast 2.0 syncs more; pairing with older PartyCast 1.0 speakers requires a double-press of the PartyCast button per the FAQ.
Is it worth it?
soundcore’s US store lists the Motion Boom Plus at $179.99 in black, with a $20-off coupon visible at the time of check. That puts it above better-tested alternatives: Wirecutter’s May 2026 portable-speaker roundup covers the Ultimate Ears Wonderboom 4 at $80 and the Fender x Teufel Rockster Go 2 at $100, and the Motion Boom Plus does not appear in it at all. The research value bands: under $100 is strong value if the specs hold up, $101–$150 is competitive, $151–$180 is weak-to-fair, and above $180 is weak unless PartyCast 2.0 multi-speaker scaling is a specific requirement. If you want a floating, bass-heavy outdoor speaker and the PartyCast ecosystem matters, the paper specs justify a look. If not, the same money buys speakers with actual test data behind them.
Which model this is
This page covers the Soundcore Motion Boom Plus, model A3129, in black from the official soundcore US store. The Amazon listing for the US variant is ASIN B09VKZPST7. Do not confuse it with the smaller Motion Boom (non-Plus), the newer Soundcore Boom, Boom 2 and Boom 3i line, or the Motion X600 and X500 series — those are distinct models.
Sources
Manufacturer:
Independent reviews:
- Wirecutter: The 5 Best Portable Bluetooth Speakers of 2026
- No instrumented professional review exists for this model; RTINGS, PCMag, TechRadar, CNET, Tom’s Guide and SoundGuys review URLs all return 404.
Owner reports:
- No owner-forum or retailer Q&A data was retrievable; the only review collection is the manufacturer’s own store page.
