These are not really the same size class, and that is the honest framing here. The JBL Authentics 300 ranks #46 of 112 boombox speakers by sound quality at $299.95; the Marshall Woburn III ranks #2 of 29 powered desktop speakers by sound quality at $599.99.
The JBL Authentics 300 is the battery-powered pick. A retro styled smart speaker with both Alexa and Google Assistant, a leather handle and battery power. Its battery is rated for 8 hours, while the Marshall Woburn III needs an outlet. It streams over Wi-Fi as well as Bluetooth, which the Marshall Woburn III cannot. It links with other speakers (Wi-Fi Multi-Room), which the Marshall Woburn III cannot. The catch: Narrow sounding, bass not as deep as others.
What the Marshall Woburn III does well: A big, loud stereo home speaker with classic Marshall styling and an HDMI ARC input that makes it a capable TV speaker too. It keeps a wired aux input, which the JBL Authentics 300 lacks.
Buy the JBL Authentics 300 ($299.95) for a boombox speaker; the Marshall Woburn III ($599.99) suits a powered desktop speaker instead.
Want more options? Browse the full Portable Bluetooth rankings and Powered Home rankings.
A retro styled smart speaker with both Alexa and Google Assistant, a leather handle and battery power.
A big, loud stereo home speaker with classic Marshall styling and an HDMI ARC input that makes it a capable TV speaker too.
Prices on this page were last checked November 5, 2026 at 10:30 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
| JBL Authentics 300 | Marshall Woburn III | |
|---|---|---|
| Price | $299.95 | $599.99 each |
| Ranked | #46 of 112 in Boombox Size Portable Bluetooth Speakers | #2 of 29 in Medium Size Powered Desktop Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 45Hz | ~45Hz |
| Battery Life | 8 hours (Manufacturer specified) | No Battery |
| EQ | Yes (App EQ) | Yes (Bass/Treble) |
| IP Rating | None | None |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) | 100.5dB @ 1m |
| Party Mode | Yes (Wi-Fi Multi-Room) | No |
| Power Input | AC Power cable | AC Power cord |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | - |
| TWS | Yes | No |
| Weight | 10.8 lbs (4.9 kg) | 16.4 lbs (7.44 kg) |
| Wi-Fi | Yes | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Power Bank | No | - |
| USB Playback | Yes | - |
| Built-in Microphone | Yes | - |
| MicroSD Playback | No | - |
| Aux Input | No | Yes |
| Amplifier Power | 100W | 150W (Woofer: 90W, Midrange: 2x15W, Tweeters: 2x15W) |
| Dimensions | 13.5” x 7.7” x 7.1” (342 x 195.6 x 180.3 mm) | 15.7” x 12.5” x 8” (400 x 317 x 203 mm) |
| Drivers | 1” tweeter + 4” woofer + passive radiators | 6” woofer, 2x 2” midranges, 2x 0.75” Dome tweeters |
| Digital Aux Input | No | - |
| Bluetooth Version | 5.3 | 5.2 |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Strap | No | - |
| Inputs | - | Bluetooth, HDMI ARC, RCA, Aux |
| Frequency Response | - | 35Hz - 20kHz (Manufacturer specified) |
| Woofer Cabinet | - | ported |
| XLR Input | - | No |
| RCA Input | - | Yes |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | Yes |
| AES Input | - | No |
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