Short answer: the EcoXGear Defender, if you are buying new, though neither ranks well in its class. The Diamondboxx M3 ranks higher than it (#76 vs #84 of 112 boombox speakers, 2.8/5 vs 2.5/5) but is discontinued, so only consider it used; the EcoXGear Defender is still sold new at $299.99. Both are rated below 3.0/5 among the 112 boombox speakers, and the Tribit Stormbox Blast, ranked #2 at $179.99, is a better place to start if sound quality matters.
The EcoXGear Defender is the tougher choice. A rugged, floating waterproof speaker that gets very loud for its size, with a flashlight, bottle opener and power bank. It is rated IP67, while the Diamondboxx M3 has no water resistance. It has an adjustable EQ, which the Diamondboxx M3 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.
The Diamondboxx M3 is the longer-running pick. A compact, very loud boombox with a powerful amplifier and a choice of large battery packs. It is rated for 40 hours of battery against 25 for the EcoXGear Defender. It plays in stereo from a single unit, unlike the EcoXGear Defender. Watch for: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard.
Buy the EcoXGear Defender if you want one new; the Diamondboxx M3 is discontinued, so only look for it used.
Want more options? Browse the full Portable Bluetooth rankings.
A rugged, floating waterproof speaker that gets very loud for its size, with a flashlight, bottle opener and power bank.
A compact, very loud boombox with a powerful amplifier and a choice of large battery packs.
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Specifications Side By Side
| EcoXGear Defender | Diamondboxx M3 | |
|---|---|---|
| Price | $299.99 | $700 Discontinued |
| Ranked | #84 of 112 in Boombox Size Portable Bluetooth Speakers | #76 of 112 in Boombox Size Portable Bluetooth Speakers |
| Battery Life | 25 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | Yes | No |
| Party Mode | No | No |
| Power Bank | Yes (USB-C, 5V/2.1A) | No |
| USB Playback | No | No |
| Built-in Microphone | Yes | No |
| Power Input | USB-C | USB-C |
| FM Tuner | No | No |
| IP Rating | IP67 | None |
| Weight | 10 lbs (4.54 kg) | 11 lbs (5 kg) |
| Bluetooth Version | 5.1 | 5.0 |
| Amplifier Power | 100W | 200W RMS / 400W peak |
| Aux Input | Yes | Yes |
| Dimensions | 6.7” x 15.4” x 9.6” (170.2 x 391.2 x 243.8 mm) | 14.7” x 9” x 8” (373.4 x 228.6 x 203.2 mm) |
| Drivers | 52mm full-range driver | 3” woofer + tweeter array |
| Digital Aux Input | No | No |
| Strap | No | - |
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