Short answer: the Teufel Boomster 4. It ranks #44 of 89 boombox speakers by sound quality (rated 3.4/5); the EcoXGear Defender ranks #72 (rated 2.5/5).
The case for the Teufel Boomster 4: Warmer and more open than the Boomster 2021 it replaces, with nicer, less harsh highs, a wide stereo image from its three-way layout (two 20mm tweeters, two 65mm midrange drivers and a 110mm woofer with passive radiators) and good detail. The catch: Side by side with the Boomster 2021 the sound barely changed, and it has a little less deep bass.
The case for the EcoXGear Defender: A rugged 4.54kg outdoor speaker with IP67 protection, a floating design, a flashlight, bottle opener, aux input, USB-C power-bank output and claimed 25-hour battery life. The tradeoff: Its single front-facing driver layout has narrow dispersion: clarity and detail drop noticeably when you move off-axis, and the soundstage is limited.
Buy the Teufel Boomster 4. It is rated higher for sound quality than the EcoXGear Defender.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Teufel Boomster 4 | EcoXGear Defender | |
|---|---|---|
| Price | €249.99 | $299.99 |
| Ranked | #44 of 89 in Boombox Size Portable Bluetooth Speakers | #72 of 89 in Boombox Size Portable Bluetooth Speakers |
| Drivers | 2x 20mm tweeters + 2x 65mm midrange drivers + 1x 110mm (4.3”) woofer, passive bass radiators | 52mm full-range driver |
| Amplifier Power | 42W RMS | 100W |
| Battery Life | 23 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| IP Rating | IPX5 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.1 |
| Bluetooth Codecs | aptX HD, AAC, SBC | SBC |
| FM Tuner | Yes (plus DAB+) | No |
| Aux Input | Yes | Yes |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Power Bank | No | Yes (USB-C, 5V/2.1A) |
| Power Input | USB-C | USB-C |
| Dimensions | 7.1”H x 14.6”W x 5.8”D (180 x 370 x 148 mm) | 6.7” x 15.4” x 9.6” (170.2 x 391.2 x 243.8 mm) |
| Weight | 8.3 lbs (3.75 kg) | 10 lbs (4.54 kg) |
| EQ | Yes (treble control) | Yes |
| App | No | No |
| Strap | No | No |
| Party Mode | - | No |
| USB Playback | - | No |
| Built-in Microphone | - | Yes |
| Digital Aux Input | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for Teufel Boomster 4:
- Earfun Uboom X vs Teufel Boomster 4
- Tribit Stormbox Blast vs Teufel Boomster 4
- Harman Kardon Go + Play 3 vs Teufel Boomster 4
- JBL Partybox Encore 2 vs Teufel Boomster 4
- JBL Partybox Encore Essential 2 vs Teufel Boomster 4
Prices on this page were last checked September 30, 2026 at 2:57 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
Teufel Boomster 4: €249.99 Teufel eBay
Older models: the Teufel Boomster 2021 (ranked lower, rated 3.4/5) and the Teufel Boomster NG (2017) (ranked lower, rated 3.2/5).
Pros: Warmer and more open than the Boomster 2021 it replaces, with nicer, less harsh highs, a wide stereo image from its three-way layout (two 20mm tweeters, two 65mm midrange drivers and a 110mm woofer with passive radiators) and good detail. Its new treble control and remote let you tame the top end. DAB+ and FM radio, a claimed 23 hours of battery at medium volume, IPX5, Bluetooth 5.0 with AAC and aptX HD, multipoint, an aux input, USB-C charging and stereo pairing.
Cons: Side by side with the Boomster 2021 the sound barely changed, and it has a little less deep bass. Against the Harman Kardon Go + Play 3 it sounds sharper and thinner, with weaker bass and a less natural stereo image, and its bass drops off at full volume. At 3.75 kg it is heavy for its size, it has no power bank output, and IPX5 is a step down from the older model’s IPX7.
Full Teufel Boomster 4 review and specifications →
| Amplifier Power | 42W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 23 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | aptX HD, AAC, SBC |
| Bluetooth Version | 5.0 |
| Dimensions | 7.1”H x 14.6”W x 5.8”D (180 x 370 x 148 mm) |
| Drivers | 2x 20mm tweeters + 2x 65mm midrange drivers + 1x 110mm (4.3”) woofer, passive bass radiators |
| EQ | Yes (treble control) |
| FM Tuner | Yes (plus DAB+) |
| IP Rating | IPX5 |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 8.3 lbs (3.75 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Mateusz Cholewa: Nowy TEUFEL Boomster 4 UNBOXING vs Boomster 3 Review in subtitles More from Mateusz Cholewa →
- Mateusz Cholewa: TEUFEL Boomster 4 vs HK Go Plus Play 3 & Opinion in Subtitles
- Dominik Reviews: Teufel BOOMSTER 4 vs BOOMSTER 2021 - No difference? Sound Battle! More from Dominik Reviews →
- Dominik Reviews: Teufel BOOMSTER 4 vs JBL Xtreme 4 - Not great for the size? Sound Test
- Dominik Reviews: Teufel BOOMSTER 4 vs Earfun UBOOM X - BASS!! - Sound Test
- Dominik Reviews: Teufel BOOMSTER 4 vs Bugani Brief Pro - Cheaper and Better! Sound Test
- Head-to-Head Comparisons
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- See all 26 comparisons
EcoXGear Defender: $299.99 Amazon eBay
Pros: A rugged 4.54kg outdoor speaker with IP67 protection, a floating design, a flashlight, bottle opener, aux input, USB-C power-bank output and claimed 25-hour battery life. Independent testing found it gets very loud for its size, while its three ecoEQ presets let you choose a bass-heavy default, a more balanced indoor mode or a brighter outdoor mode.
Cons: Its single front-facing driver layout has narrow dispersion: clarity and detail drop noticeably when you move off-axis, and the soundstage is limited. The default setting can be over-bassy at lower volumes, while there is no app, precise EQ, battery indicator or multi-speaker party mode. Bass does not reach as deep as competitors.
Full EcoXGear Defender review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 6.7” x 15.4” x 9.6” (170.2 x 391.2 x 243.8 mm) |
| Drivers | 52mm full-range driver |
| EQ | Yes |
| FM Tuner | No |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-C, 5V/2.1A) |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 10 lbs (4.54 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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