These sit in different size classes, so this is not a straight ranking comparison. The JBL Xtreme 3 ranks #18 of 120 large speakers by sound quality at $269.95; the Marshall Emberton III ranks #126 of 179 medium speakers by sound quality at $179.99.
The JBL Xtreme 3 is the deeper-bass choice. A loud, waterproof stereo speaker with deep bass, balanced sound and a power bank for charging devices. Its bass reaches about 53Hz before falling 10dB, against 62Hz for the Marshall Emberton III. It keeps a wired aux input, which the Marshall Emberton III lacks. The catch: Boosted bass.
The Marshall Emberton III is the longer-running, lighter pick. A tough waterproof speaker with Marshall styling and a very long battery, plus quick charging. It is rated for 32 hours of battery against 15 for the JBL Xtreme 3. At 1.5 lbs (673 g) it weighs much less than the JBL Xtreme 3 at 4 lbs (1.83 kg). It has an adjustable EQ, which the JBL Xtreme 3 lacks. Watch for: Strange unnatural echo-like sound coloration, bass not as deep as competitors.
Buy the JBL Xtreme 3 at $269.95 for a large speaker, or the Marshall Emberton III at $179.99 for a medium speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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 Xtreme 3 | Marshall Emberton III | |
|---|---|---|
| Price | $269.95 | $179.99 |
| Ranked | #18 of 120 in Large Size Portable Bluetooth Speakers | #126 of 179 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 53Hz | 62Hz |
| Battery Life | 15 hours (Manufacturer specified) | 32 hours (Manufacturer specified) |
| Bluetooth Latency | 133ms | - |
| Maximum SPL | 105dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | Yes (Marshall Stack) |
| Power Bank | Yes (USB-A + USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| TWS | Yes | No |
| Weight | 4 lbs (1.83 kg) | 1.5 lbs (673 g) |
| App | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes (3 presets via app) |
| IP Rating | IPX7 | IP67 |
| Bluetooth Version | 4.1 | 5.3 |
| Dimensions | 11.7” x 5.4” x 5.3” (298 x 136 x 134 mm) | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) |
| Drivers | 2x 70mm woofers, 2x 20mm tweeters | 2x 2” full-range cone drivers + 2x 2” passive radiators |
| Frequency Response | 53.5Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 100W | 20W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | No |
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