Short answer: the Yeahbox Sonic Boom Max 3. It ranks #40 of 75 boombox speakers by sound quality at $228.99; the Diamondboxx M3 ranks #53 and costs $700, so there is little reason to consider the other one.
What the Yeahbox Sonic Boom Max 3 offers: A large 3-way, 5-driver party speaker with claimed 200W RMS output, a 111Wh battery, USB-C fast charging, app EQ, TWS pairing, and aux, USB and microSD playback. Listener comparisons describe powerful bass, strong output and decent mids and highs for outdoor party use. Watch for: There is limited independent testing and the water/dust rating is reported inconsistently across listings. Listener comparisons find it less clear and refined than stronger boombox rivals, so its big bass and output are a better fit for parties than critical listening.
What the Diamondboxx M3 offers: An unusually compact 5kg high-output boombox, with a claimed 200W RMS Class A/B amplifier, 114dB maximum level, active crossovers and a choice of large battery packs. It has aux input, USB-C power and TWS pairing, while the aluminum heat sink is designed to sustain loud playback without thermal shutdown. Watch for: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard. The treble-forward tuning can sound aggressive, there is no app or EQ to correct it, and the lack of a water rating makes it a poor match for poolside or rough-weather use.
Buy the Yeahbox Sonic Boom Max 3. It ranks higher for sound quality than the Diamondboxx M3 and costs less, so there is no real case for the other one.
If water resistance matters to you, the Yeahbox Sonic Boom Max 3 at IPX6 (powerful water jets) holds up far better than the Diamondboxx M3 at no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Yeahbox Sonic Boom Max 3 | Diamondboxx M3 | |
|---|---|---|
| Price | $228.99 | $700 |
| Ranked | #40 of 75 in Boombox Size Portable Bluetooth Speakers | #53 of 75 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 Version | 5.3 | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| 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:
- Tribit Stormbox Blast vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore 2 vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore Essential 2 vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore vs Yeahbox Sonic Boom Max 3
- JBL Partybox Encore Essential vs Yeahbox Sonic Boom Max 3
Prices on this page were last checked September 16, 2026 at 12:41 AM 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
Yeahbox Sonic Boom Max 3: $228.99 Amazon eBay
Pros: A large 3-way, 5-driver party speaker with claimed 200W RMS output, a 111Wh battery, USB-C fast charging, app EQ, TWS pairing, and aux, USB and microSD playback. Listener comparisons describe powerful bass, strong output and decent mids and highs for outdoor party use.
Cons: There is limited independent testing and the water/dust rating is reported inconsistently across listings. Listener comparisons find it less clear and refined than stronger boombox rivals, so its big bass and output are a better fit for parties than critical listening.
Full Yeahbox Sonic Boom Max 3 review and specifications →
| Amplifier Power | 200W RMS / 300W Peak |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 111Wh (14.8V/7,500mAh) (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 20.7" x 8.3" x 10.6" (525 x 210 x 268 mm) |
| Drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters |
| EQ | Yes |
| IP Rating | IPX6 |
| Lights | Yes |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 16.8 lbs (7.64 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Yeahbox Sonic Boom Max 3 vs Skullcandy Barrel
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- See all 52 comparisons
Diamondboxx M3: $700 eBay
Pros: An unusually compact 5kg high-output boombox, with a claimed 200W RMS Class A/B amplifier, 114dB maximum level, active crossovers and a choice of large battery packs. It has aux input, USB-C power and TWS pairing, while the aluminum heat sink is designed to sustain loud playback without thermal shutdown.
Cons: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard. The treble-forward tuning can sound aggressive, there is no app or EQ to correct it, and the lack of a water rating makes it a poor match for poolside or rough-weather use.
Full Diamondboxx M3 review and specifications →
| Amplifier Power | 200W RMS / 400W peak |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 14.7" x 9" x 8" (373.4 x 228.6 x 203.2 mm) |
| Drivers | 3" woofer + tweeter array |
| EQ | No |
| FM Tuner | No |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 11 lbs (5 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
- Diamondboxx M3 vs W-King D10
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- Diamondboxx M3 vs Onn Medium Party Speaker Gen 2
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- See all 44 comparisons