Short answer: the JBL Authentics 300. It ranks #33 of 76 boombox speakers by sound quality, rated 3.5/5, at $299.95. The onn Pro X Large Boom Boombox ranks #35, rated 3.4/5, at $199, $100.95 cheaper, which does not close the gap in sound quality.
Why pick the JBL Authentics 300: Integrates both Amazon Alexa and Google Assistant simultaneously (rare for smart speakers). The tradeoff: Narrow sounding, bass not as deep as others.
What the onn Pro X Large Boom Boombox does well: High rated power for the price at 180W RMS (540W peak). Watch for: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast.
Buy the JBL Authentics 300. It is rated higher for sound quality, and saving $100.95 with the onn Pro X Large Boom Boombox does not make up for the sound-quality gap.
There is a real battery-life gap here: the onn Pro X Large Boom Boombox is rated for 20 hours, the JBL Authentics 300 only 8 hours.
There is a real gap in water resistance: the onn Pro X Large Boom Boombox at IP67 (brief submersion) against the JBL Authentics 300, which has no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| JBL Authentics 300 | onn Pro X Large Boom Boombox | |
|---|---|---|
| Price | $299.95 | $199.00 |
| Ranked | #33 of 76 in Boombox Size Portable Bluetooth Speakers | #35 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | - |
| Bass Extension (-10dB) | 45Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | Yes (Bass Boost) |
| IP Rating | None | IP67 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wi-Fi Multi-Room) | Yes (Auracast) |
| Power Input | AC Power cable | AC Power cord |
| Stereo | Partially (1 woofer) | - |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 10.8 lbs (4.9 kg) | 17.2 lbs (7.8 kg) |
| Wi-Fi | Yes | - |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Power Bank | No | Yes (USB-A, 5V/2A) |
| USB Playback | Yes | - |
| Built-in Microphone | Yes | - |
| MicroSD Playback | No | - |
| Aux Input | No | Yes |
| Amplifier Power | 100W | 180W RMS (540W peak) |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators | 5 speakers |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.4 (Manufacturer specified) |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Strap | No | - |
| Removable Battery | - | No |
| Discontinued | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
Related Speaker Comparisons
More top alternatives to JBL Authentics 300:
- Tribit Stormbox Blast vs JBL Authentics 300
- Harman Kardon Go + Play 3 vs JBL Authentics 300
- JBL Partybox Encore 2 vs JBL Authentics 300
- JBL Partybox Encore Essential 2 vs JBL Authentics 300
- JBL Partybox Encore vs JBL Authentics 300
Prices on this page were last checked September 26, 2026 at 11:14 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 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
- JBL Authentics 300 vs JBL Boombox 2
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onn Pro X Large Boom Boombox: $199.00 Walmart eBay
Pros: High rated power for the price at 180W RMS (540W peak). IP67 waterproof design for indoor and outdoor use. 20 hour battery life. 6 LED lighting modes. Party Mode supports multiple devices.
Cons: Bass not as deep as higher ranked speakers like the JBL Boombox 3, JBL Boombox 4, or Tribit Stormbox Blast. Frequency response isn’t as smooth as the top ranked speakers. Charges via AC cable rather than USB-C. Only available in the United States and Canada.
Full onn Pro X Large Boom Boombox review and specifications →
| Amplifier Power | 180W RMS (540W peak) |
|---|---|
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 (Manufacturer specified) |
| Digital Aux Input | No |
| Dimensions | 20.1” x 10.3” x 9” (510 x 261 x 228 mm) |
| Discontinued | No |
| Drivers | 5 speakers |
| EQ | Yes (Bass Boost) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| TWS | Yes |
| Weight | 17.2 lbs (7.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- onn Pro X Large Boom Boombox vs Teufel Boomster 2021
- onn Pro X Large Boom Boombox vs W-King X20
- onn Pro X Large Boom Boombox vs Soundcore Boom 2 Plus
- onn Pro X Large Boom Boombox vs Sony ULT Field 7
- onn Pro X Large Boom Boombox vs Zealot S95
- onn Pro X Large Boom Boombox vs LG Xboom Stage 301
- onn Pro X Large Boom Boombox vs Tribit Stormbox Blast 2
- onn Pro X Large Boom Boombox vs Sony SRS-XG500
- See all 15 comparisons