Short answer: the EcoXGear Defender, if you are buying new. The Teufel Boomster 2021 ranks higher than it (#46 vs #74 of 91 boombox speakers, 3.4/5 vs 2.5/5) but is discontinued, so only consider it used; the EcoXGear Defender is still sold new at $299.99.
The Teufel Boomster 2021 is the better-sounding choice. It plays in stereo from a single unit, unlike the EcoXGear Defender.
The EcoXGear Defender is the longer-running pick. A rugged 10 lbs (4.54 kg) 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. It is rated for 25 hours of battery against 18 for the Teufel Boomster 2021. It has an adjustable EQ, which the Teufel Boomster 2021 lacks. 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 EcoXGear Defender, since the Teufel Boomster 2021 is discontinued and only worth hunting down used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Teufel Boomster 2021 | EcoXGear Defender | |
|---|---|---|
| Price | €250 Discontinued | $299.99 |
| Ranked | #46 of 91 in Boombox Size Portable Bluetooth Speakers | #74 of 91 in Boombox Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Battery Life | 18 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| EQ | No | Yes |
| FM Tuner | Yes | No |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 8.3 lbs (3.75 kg) | 10 lbs (4.54 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Party Mode | No | No |
| Power Bank | No | Yes (USB-C, 5V/2.1A) |
| USB Playback | No | No |
| Built-in Microphone | No | Yes |
| Power Input | USB-C | USB-C |
| Amplifier Power | 42W RMS | 100W |
| Dimensions | 14.6” x 7.1” x 5.8” (370 x 180 x 148 mm) | 6.7” x 15.4” x 9.6” (170.2 x 391.2 x 243.8 mm) |
| Drivers | 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters | 52mm full-range driver |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 5.1 |
| Strap | No | No |
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Prices on this page were last checked October 4, 2026 at 9:58 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 2021: €250 Discontinued eBay
Newer model: the Teufel Boomster 4, ranked higher, rated 3.4/5.
Pros: Teufel Boomster 2021 uses 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters. Its 3.75 kg, claimed 18 hours (Manufacturer specified) battery life, IPX7 protection, aux input and stereo playback make it a practical option for its intended room or portable use.
Cons: There is no companion app. No EQ adjustment. Discontinued.
Full Teufel Boomster 2021 review and specifications →
| Amplifier Power | 42W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 14.6” x 7.1” x 5.8” (370 x 180 x 148 mm) |
| Drivers | 1x 110mm (4.3”) woofer + 2x 65mm midrange drivers + 2x 20mm tweeters |
| EQ | No |
| FM Tuner | Yes |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 8.3 lbs (3.75 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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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
- Head-to-Head Comparisons
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