Short answer: the Soundcore Boom 2 Plus. It ranks #28 of 75 boombox speakers by sound quality at $179.99; the Diamondboxx M3 ranks #53 and costs $700, so there is little reason to consider the other one.
What the Soundcore Boom 2 Plus offers: Quite a bit lighter than most of the other boombox size speakers. This speaker will likely move up as we get a good EQ tune that makes it a lot more neutral. Watch for: Warm tuning meaning a rolled off treble and some upper bass boost. Reasonably deep bass, but not as good as the top ranked.
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 Soundcore Boom 2 Plus. It ranks higher for sound quality than the Diamondboxx M3 and costs less, so there is no real case for the other one.
If battery life is a priority, the Diamondboxx M3 is rated for 40 hours versus 20 hours for the Soundcore Boom 2 Plus.
Water resistance is not close: the Soundcore Boom 2 Plus is rated at IPX7 (brief submersion), well ahead of the Diamondboxx M3 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore Boom 2 Plus | Diamondboxx M3 | |
|---|---|---|
| Price | $179.99 | $700 |
| Ranked | #28 of 75 in Boombox Size Portable Bluetooth Speakers | #53 of 75 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 39Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| EQ | Yes (Pro EQ + presets) | No |
| IP Rating | IPX7 | None |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | No | - |
| Party Mode | Yes (PartyCast 2.0) | No |
| Power Bank | Yes (USB-C, 5V/2A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 8.4 lbs (3.8 kg) | 11 lbs (5 kg) |
| Bluetooth Codecs | SBC, AAC | SBC |
| USB Playback | No | No |
| Built-in Microphone | Yes | No |
| Amplifier Power | 140W | 200W RMS / 400W peak |
| Dimensions | 17.3" x 9.1" x 5.9" (440 x 230 x 150 mm) | 14.7" x 9" x 8" (373.4 x 228.6 x 203.2 mm) |
| Drivers | 2x 114mm (4.5") woofers + 2x 19mm (0.75") tweeters | 3" woofer + tweeter array |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| FM Tuner | - | No |
Related Speaker Comparisons
More top alternatives to Soundcore Boom 2 Plus:
- Soundcore Boom 2 Plus vs Tribit Stormbox Blast
- Harman Kardon Go + Play 3 vs Soundcore Boom 2 Plus
- JBL Partybox Encore 2 vs Soundcore Boom 2 Plus
- JBL Partybox Encore Essential 2 vs Soundcore Boom 2 Plus
- JBL Partybox Encore vs Soundcore Boom 2 Plus
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
Soundcore Boom 2 Plus: $179.99 Amazon B&H Photo Video eBay
Pros: Quite a bit lighter than most of the other boombox size speakers. This speaker will likely move up as we get a good EQ tune that makes it a lot more neutral. Measured bass extension of 39Hz (-10dB).
Cons: Warm tuning meaning a rolled off treble and some upper bass boost. Reasonably deep bass, but not as good as the top ranked.
Full Soundcore Boom 2 Plus review and specifications →
| Amplifier Power | 140W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | 39Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 17.3" x 9.1" x 5.9" (440 x 230 x 150 mm) |
| Drivers | 2x 114mm (4.5") woofers + 2x 19mm (0.75") tweeters |
| EQ | Yes (Pro EQ + presets) |
| IP Rating | IPX7 |
| Lights | Yes |
| Maximum SPL | 111dB (measured by Alan Ross Reviews) |
| MicroSD Playback | No |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast 2.0) |
| Power Bank | Yes (USB-C, 5V/2A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 8.4 lbs (3.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: This sounds totally different now! Soundcore Boom Plus 2 firmware 03.10 More from alanrossreviews →
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400?
- Jay’s Straight Up Reviews & More: Soundcore Boom 2 Plus VS Tribit Stormbox Blast 🛜 Boombox Basement Battle 📊Custom EQ 🔥Who You Got? More from JaysStraightUpReviews →
- Picky Audio: SO CLOSE! Soundcore Boom 2 Plus vs JBL Boombox 3 More from pickyaudio →
- Picky Audio: Extended Sound Test (Soundcore Boom 2 Plus vs JBL Boombox 3)
- Jay’s Straight Up Reviews & More: NEW RELEASE! Soundcore Boom 2 Plus vs Motion Boom Plus🤯Stock EQ, Bass^ Enabled🤜🤛 A Family Feud😆
- GYMCADDY: Soundcore Boom 2 Plus Showcase - Lots Of Bass In A Small Package More from GYMCADDY →
- EL JEFE REVIEWS: Soundcore Boom 2 Plus 💥 BIGGER & BADDER! More from ELJefeReviews →
- Jagist reviews: Zealot S95 Vs Soundcore Boom 2 Plus!!! More from Jagistreviews →
- Head-to-Head Comparisons
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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
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- See all 44 comparisons