Short answer: the JBL Boombox 3 Wifi. It ranks #26 of 112 boombox speakers by sound quality (rated 3.8/5) at $389.95 and is still sold new; the Diamondboxx M3 ranks #76 (rated 2.8/5) and is discontinued, so it is only an option used.
The JBL Boombox 3 Wifi is the better-sounding, tougher option. A big, waterproof stereo boombox with Wi-Fi, a long battery and enough volume for any outdoor party. It is rated IP67, while the Diamondboxx M3 has no water resistance. The tradeoff: Bass boosted.
The Diamondboxx M3 is the longer-running, lighter choice. 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 24 for the JBL Boombox 3 Wifi. At 11 lbs (5 kg) it weighs noticeably less than the JBL Boombox 3 Wifi at 14.6 lbs (6.6 kg). Watch for: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard.
Buy the JBL Boombox 3 Wifi. It is rated higher for sound quality and still sold new, while the Diamondboxx M3 is discontinued.
Want more options? Browse the full Portable Bluetooth rankings.
A big, waterproof stereo boombox with Wi-Fi, a long battery and enough volume for any outdoor party.
A compact, very loud boombox with a powerful amplifier and a choice of large battery packs.
Prices on this page were last checked October 31, 2026 at 7:11 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 Boombox 3 Wifi | Diamondboxx M3 | |
|---|---|---|
| Price | $389.95 | $700 Discontinued |
| Ranked | #26 of 112 in Boombox Size Portable Bluetooth Speakers | #76 of 112 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 43Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| IP Rating | IP67 | None |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | No |
| Power Bank | Yes (USB-A, 5V/2A) | No |
| Power Input | AC Power cable | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 14.6 lbs (6.6 kg) | 11 lbs (5 kg) |
| Wi-Fi | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | No |
| USB Playback | No | No |
| Built-in Microphone | No | No |
| Amplifier Power | 200W AC / 140W battery | 200W RMS / 400W peak |
| Dimensions | 19.1” x 10.1” x 7.9” (484 x 256 x 200 mm) | 14.7” x 9” x 8” (373.4 x 228.6 x 203.2 mm) |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters | 3” woofer + tweeter array |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.0 |
| Strap | No | - |
| FM Tuner | - | No |
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