Short answer: the Yeahbox Sonic Boom Max 3. It ranks #59 of 112 boombox speakers by sound quality (rated 3.2/5) at $228.99 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 Yeahbox Sonic Boom Max 3 is the better-sounding, tougher choice. A large party speaker with powerful bass, a big fast charging battery and app EQ for outdoor parties. It is rated IPX6, while the Diamondboxx M3 has no water resistance. It has an adjustable EQ, which the Diamondboxx M3 lacks. Watch for: There is limited independent testing and the water/dust rating is reported inconsistently across listings.
The Diamondboxx M3 is the lighter pick. A compact, very loud boombox with a powerful amplifier and a choice of large battery packs. At 11 lbs (5 kg) it weighs noticeably less than the Yeahbox Sonic Boom Max 3 at 16.8 lbs (7.64 kg). The catch: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard.
Buy the Yeahbox Sonic Boom Max 3. It is rated higher for sound quality, and the Diamondboxx M3 is discontinued, so it is only available used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A large party speaker with powerful bass, a big fast charging battery and app EQ for outdoor parties.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Yeahbox Sonic Boom Max 3 | Diamondboxx M3 | |
|---|---|---|
| Price | $228.99 | $700 Discontinued |
| Ranked | #59 of 112 in Boombox Size Portable Bluetooth Speakers | #76 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 111Wh (14.8V/7,500mAh) (Manufacturer specified) | 40 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IPX6 | None |
| MicroSD Playback | Yes | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 16.8 lbs (7.64 kg) | 11 lbs (5 kg) |
| USB Playback | Yes | No |
| Amplifier Power | 200W RMS / 300W Peak | 200W RMS / 400W peak |
| Dimensions | 20.7” x 8.3” x 10.6” (525 x 210 x 268 mm) | 14.7” x 9” x 8” (373.4 x 228.6 x 203.2 mm) |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters | 3” woofer + tweeter array |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Strap | No | - |
| Party Mode | - | No |
| Power Bank | - | No |
| Built-in Microphone | - | No |
| FM Tuner | - | No |
Related Speaker Comparisons
How Yeahbox Sonic Boom Max 3 compares with other leading options: