Short answer: the JBL Authentics 300. It ranks #33 of 76 boombox speakers by sound quality, rated 3.5/5, at $299.95. The Monster Rockin’ Roller 270 ranks #70, rated 2.1/5, at $249, $50.95 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). Watch for: Narrow sounding, bass not as deep as others.
Why pick the Monster Rockin’ Roller 270: 100 hour battery life. The tradeoff: Bass not as deep as competitors, less neutral than ION speakers.
Buy the JBL Authentics 300. It is rated higher for sound quality, and the $50.95 saving on the Monster Rockin’ Roller 270 is not enough to make up the difference.
If battery life is a priority, the Monster Rockin’ Roller 270 is rated for 100 hours versus 8 hours for the JBL Authentics 300.
If water resistance matters to you, the Monster Rockin’ Roller 270 at IPX4 (splashing) holds up far better than the JBL Authentics 300 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Authentics 300 | Monster Rockin’ Roller 270 | |
|---|---|---|
| Price | $299.95 | $249.00 |
| Ranked | #33 of 76 in Boombox Size Portable Bluetooth Speakers | #70 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (Monster Zone Control app) |
| Bass Extension (-10dB) | 45Hz | 53Hz |
| Battery Life | 8 hours (Manufacturer specified) | 100 hours (Manufacturer specified) |
| EQ | Yes (App EQ) | Yes |
| IP Rating | None | IPX4 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | 96dB (Manufacturer specified) |
| Party Mode | Yes (Wi-Fi Multi-Room) | No |
| Power Input | AC Power cable | USB-C |
| Stereo | Partially (1 woofer) | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 10.8 lbs (4.9 kg) | 28.7 lbs (13 kg) |
| Wi-Fi | 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 | 200W |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) | 15” x 18.6” x 10.9” (381 x 472 x 276 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators | 2x 3” (76mm) woofers + 2x tweeters (size undisclosed) |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.0 |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Strap | No | - |
| FM Tuner | - | Yes |
| Wheels | - | Yes |
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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 →
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Monster Rockin’ Roller 270: $249.00 Amazon eBay
Pros: 100 hour battery life. 270° sound coverage, stereo output. IPX4 weather-resistant. Wheels and integrated handle. Qi wireless charging pad for your phone. TWS pairing with another 270. Measured bass extension of 53Hz (-10dB).
Cons: Bass not as deep as competitors, less neutral than ION speakers. Very heavy
Full Monster Rockin’ Roller 270 review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | Yes (Monster Zone Control app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 100 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 15” x 18.6” x 10.9” (381 x 472 x 276 mm) |
| Drivers | 2x 3” (76mm) woofers + 2x tweeters (size undisclosed) |
| EQ | Yes |
| FM Tuner | Yes |
| IP Rating | IPX4 |
| Maximum SPL | 96dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 28.7 lbs (13 kg) |
| Wheels | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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