Short answer: the JBL Authentics 200. Both are rated 3.7/5 for sound quality (#10 and #11 of 29 powered desktop speakers), and the JBL Authentics 200 costs $199.95 against $298.99 for the Marshall Acton III, and with sound quality even, the cheaper one is the better buy.
The Authentics 200 is a genuinely different kind of speaker, not just a pricier Bluetooth box. It connects over Wi-Fi with AirPlay, Chromecast, and Spotify Connect built in, and supports Amazon Alexa and Google Assistant simultaneously, which our notes call rare at this size. The Acton III has no Wi-Fi at all, connecting only over Bluetooth or a wired aux input. Reviewers rate the Authentics 200’s sound as well balanced and close to the pricier Authentics 300, and it measured about 113dB at 1kHz on max volume, matching that larger model despite its smaller cabinet.
Both speakers share the same core bass limitation. The Authentics 200’s own notes call out bass that isn’t as deep as others, and the Acton III’s only documented con is the same complaint: not as deep bass as competitors in its class. Neither is the pick if deep bass output is your top priority.
The rest of the spec sheet favors the Authentics 200. It runs 90W against the Acton III’s 60W, and its 5-inch woofer with a 6-inch down-firing passive radiator gives it more low-end reinforcement than the Acton III’s twin 4-inch driver layout.
Buy the JBL Authentics 200 if you want Wi-Fi streaming, multi-room support, and voice assistant integration alongside better measured output.
Buy the Marshall Acton III if you just need a simple Bluetooth desktop speaker and don’t need Wi-Fi streaming or a voice assistant.
Looking for alternatives? See the complete Powered Home rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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 200 | Marshall Acton III | |
|---|---|---|
| Price | $199.95 each | $298.99 each |
| Ranked | #10 of 29 in Medium Size Powered Desktop Speakers | #11 of 29 in Medium Size Powered Desktop Speakers |
| App | Yes | Yes |
| Battery Life | No Battery | No Battery |
| EQ | Yes | Yes (Bass/Treble) |
| Inputs | Bluetooth, Wifi, Aux, USB (US only) | Bluetooth, Aux |
| IP Rating | None | None |
| Party Mode | Yes (Wi-Fi multi-room) | No |
| Stereo | Partially (1 woofer) | Partially (1 woofer) |
| Drivers | 5” full-range woofer, 2x 25mm tweeters; 6-inch down-firing passive radiator; 6-inch down-firing passive radiator; 6-inch down-firing passive radiator; 6-inch down-firing passive radiator | 4” (midrange/woofer), 1x 4” midrange, 2x 0.75” Dome tweeters |
| TWS | No | No |
| Weight | 9.3 lbs (4.2 kg) | 6.3 lbs (2.85 kg) |
| Wi-Fi | Yes (IEEE 802.11 a/b/g/n/ac/ax (2.4GHz/5GHz)) | No |
| Woofer Cabinet | ported | ported |
| Bass Extension (-10dB) | ~50Hz | - |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 10.5” x 6.8” x 6.6” (266.3 x 171.7 x 167.4 mm) | 10.2” x 6.7” x 5.9” (260 x 170 x 150 mm) |
| Frequency Response | 50Hz - 20kHz (-6dB) (Manufacturer specified) | 45Hz - 20kHz (Manufacturer specified) |
| Power Input | AC Power Cable (100-240V) | - |
| Streaming Services | AirPlay, Chromecast, Spotify Connect, Alexa MRM | - |
| Voice Assistants | Amazon Alexa & Google Assistant (simultaneous) | - |
| Amplifier Power | 90W | 60W (Woofer: 30W, Tweeters: 2x15W) |
| XLR Input | No | No |
| RCA Input | No | No |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | Yes |
| Power Bank | - | No |
Where the Ratings Come From
- JBL Authentics 200: reviews by Jay’s Straight Up Reviews & More and Danny Pops.
- Marshall Acton III: reviews by Danny Pops.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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