Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The JBL Xtreme 4 ranks #43 of 120 large speakers by sound quality at $309.95; the Teufel Boomster 4 ranks #50 of 113 boombox speakers by sound quality.
Different sizes. The Xtreme 4 is a large 4.6 lbs (2.1 kg) speaker. The Boomster 4 is a 8.3 lbs (3.75 kg) boombox with a three-way stereo layout. Each is rated within its own class.
Listeners heard different strengths. In a side by side sound test, commenters found the Boomster 4 more even and detailed with a wider stereo image, and the Xtreme 4 more scooped in the bass. The Boomster 4 loses bass at full volume.
Toughness favors the JBL: IP67 against IPX5, a replaceable battery, a power bank output and Auracast. The Boomster 4 adds DAB+ and FM radio, an aux input and a treble control.
Buy the JBL Xtreme 4 for a large speaker, or the Teufel Boomster 4 for a boombox speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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 4 | Teufel Boomster 4 | |
|---|---|---|
| Price | $309.95 | €249.99 |
| Ranked | #43 of 120 in Large Size Portable Bluetooth Speakers | #50 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 23 hours (Manufacturer specified) |
| EQ | Yes (5 band) | Yes (treble control) |
| IP Rating | IP67 | IPX5 |
| Bluetooth Latency | 220ms | - |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Auracast) | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Removable Battery | Yes | - |
| TWS | Yes | Yes |
| Weight | 4.6 lbs (2.1 kg) | 8.3 lbs (3.75 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | aptX HD, AAC, SBC |
| Built-in Microphone | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) | 7.1”H x 14.6”W x 5.8”D (180 x 370 x 148 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators | 2x 20mm tweeters + 2x 65mm midrange drivers + 1x 110mm (4.3”) woofer, passive bass radiators |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 100W | 42W RMS |
| Digital Aux Input | No | - |
| Strap | Yes (detachable shoulder strap) | No |
| FM Tuner | - | Yes (plus DAB+) |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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