Short answer: the JBL Authentics 300 for smart features, the Soundcore Motion Boom+ for output. The Motion Boom+ delivers 80W of stereo from dual 30W woofers and dual 10W titanium tweeters, but every default preset is warm with rolled-off treble. The Authentics 300 integrates Amazon Alexa and Google Assistant simultaneously, though it sounds narrow and its bass is not as deep as others.
Buy the JBL Authentics 300. It is rated higher for sound quality and still sold new, while the Soundcore Motion Boom+ is discontinued.
Water resistance is not close: the Soundcore Motion Boom+ is rated at IP67 (brief submersion), well ahead of the JBL Authentics 300 at no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| JBL Authentics 300 | Soundcore Motion Boom+ | |
|---|---|---|
| Price | $299.95 | $122.42 after $40 coupon, Discontinued |
| Ranked | #41 of 90 in Boombox Size Portable Bluetooth Speakers | #63 of 90 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (Soundcore app) |
| Bass Extension (-10dB) | 45Hz | 52Hz |
| Battery Life | 8 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | Yes (App EQ) |
| IP Rating | None | IP67 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | 108dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Wi-Fi Multi-Room) | Yes (PartyCast up to 100 speakers) |
| Power Input | AC Power cable | USB-C |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 10.8 lbs (4.9 kg) | 5.3 lbs (2.4 kg) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Power Bank | No | Yes (USB-A, 5V/2.1A) |
| USB Playback | Yes | No |
| Built-in Microphone | Yes | No |
| MicroSD Playback | No | - |
| Aux Input | No | Yes |
| Amplifier Power | 100W | 80W |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) | 15.1” x 5.1” x 7.7” (384 x 130 x 196 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators | 30W: Dual drivers |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Strap | No | Yes (detachable strap) |
| Aux Latency | - | 17ms |
| Bluetooth Latency | - | 33ms |
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Prices on this page were last checked October 2, 2026 at 10:18 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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The Two Speakers In Full
JBL Authentics 300: $299.95 Amazon eBay
Pros: Integrates both Amazon Alexa and Google Assistant simultaneously (rare for smart speakers). Retro seventies design with leather and Quadrex grille. 100-watt amp, carries well with leather-trimmed handle. Rechargeable battery rated ~8 hours. Measured bass extension of 45Hz (-10dB).
Cons: Narrow sounding, bass not as deep as others. Peaky upper mids. No TWS. No IP rating. Not as loud as others. Not much battery life.
Full JBL Authentics 300 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | No |
| Omnidirectional | No |
| Party Mode | Yes (Wi-Fi Multi-Room) |
| Power Bank | No |
| Power Input | AC Power cable |
| Stereo | Partially (1 woofer) |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) |
| Weight | 10.8 lbs (4.9 kg) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- JOY‘s 🎧3D🔈Audio-Show: JBL Authentics 300 - sound quality test More from Oluv’Sone →
- Oluv Patreon: JBL Authentics 300 - update
- Oluv Patreon: JBL Authentics 300 - listening session
- Alan Ross Reviews: Not quite! JBL Authentics 300 review and sound test vs Boombox 3, Encore and Stormbox Blast More from alanrossreviews →
- Head-to-Head Comparisons
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Soundcore Motion Boom+: $122.42 after $40 coupon Discontinued Amazon eBay
Newer model: the Soundcore Boom 2 Plus, ranked higher, rated 3.6/5.
Pros: 80W stereo from dual 30W woofers + dual 10W tweeters with titanium drivers for treble clarity. 13,400mAh battery for 20 hours (12-15 at high volume). IP67 waterproof, floats, rugged build inspires confidence. Bluetooth 5.3 multipoint pairing, Soundcore app EQ, PartyCast 2.0 mode. USB-C input, USB-A output for powerbank. Measured bass extension of 52Hz (-10dB).
Cons: Default presets are all warm sounding with rolled off treble. Will need a custom EQ to get closer to neutral. A shrill sounding 6kHz peak comes out when volume is above about 60%. Not much deeper bass than a Motion Boom and a lot less deep bass than other speakers in the class. Discontinued.
Full Soundcore Motion Boom+ review and specifications →
| Amplifier Power | 80W |
|---|---|
| App | Yes (Soundcore app) |
| Aux Input | Yes |
| Aux Latency | 17ms |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 33ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 15.1” x 5.1” x 7.7” (384 x 130 x 196 mm) |
| Drivers | 30W: Dual drivers |
| EQ | Yes (App EQ) |
| IP Rating | IP67 |
| Maximum SPL | 108dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| USB Playback | No |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Soundcore Motion Boom Plus & Earfun UBoom X - sound test More from Oluv’Sone →
- Alan Ross Reviews: Tribit Stormbox Blast or Soundcore Motion Boom Plus or W King D10? 🤪 More from alanrossreviews →
- Alan Ross Reviews: Tribit Stormbox Blast Review vs Soundcore Motion Boom Plus - cheap bass!
- DLX Willington: Tough Game! Tribit Stormbox Blast vs Soundcore Motion Boom Plus Binaural sound samples More from DLXWillington →
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