Short answer: the W-King D20. It ranks #29 of 75 boombox speakers by sound quality at $193; the Diamondboxx M3 ranks #53 and costs $700, so there is little reason to consider the other one.
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.
What the W-King D20 offers: Comes with 2 wireless microphones Watch for: Rising frequency response but upper treble rolled off, 700hz and 1.2khz peaks
Buy the W-King D20. It ranks higher for sound quality than the Diamondboxx M3 and costs less, so the other one has nothing left to offer.
There is a real gap in water resistance: the W-King D20 at IPX6 (powerful water jets) against the Diamondboxx M3, which has no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Diamondboxx M3 | W-King D20 | |
|---|---|---|
| Price | $700 | $193 |
| Ranked | #53 of 75 in Boombox Size Portable Bluetooth Speakers | #29 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 40 hours (Manufacturer specified) | - |
| IP Rating | None | IPX6 |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 11 lbs (5 kg) | 14.3 lbs (6500 g) |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (W-King app) |
| EQ | No | Yes (App + button modes) |
| TWS | Yes | Yes |
| Party Mode | No | No |
| Power Bank | No | Yes |
| USB Playback | No | Yes |
| Built-in Microphone | No | No |
| Power Input | USB-C | USB-C |
| FM Tuner | No | - |
| Amplifier Power | 200W RMS / 400W peak | 200W |
| Dimensions | 14.7" x 9" x 8" (373.4 x 228.6 x 203.2 mm) | 19.9" x 8.5" x 10.6" (506 x 217 x 270 mm) |
| Drivers | 3" woofer + tweeter array | 4.5" + 3.5" drivers + 1.2" tweeters |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | ~42Hz |
| Maximum SPL | - | 112dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
| Wireless Microphones | - | Yes |
Related Speaker Comparisons
More top alternatives to W-King D20:
- Tribit Stormbox Blast vs W-King D20
- Harman Kardon Go + Play 3 vs W-King D20
- JBL Partybox Encore 2 vs W-King D20
- JBL Partybox Encore Essential 2 vs W-King D20
- JBL Partybox Encore vs W-King D20
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
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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- Diamondboxx M3 vs JBL Partybox On the Go
- Diamondboxx M3 vs Onn Medium Party Speaker Gen 2
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- See all 44 comparisons
W-King D20: $193 Aliexpress eBay
Pros: Comes with 2 wireless microphones. Measured bass extension of ~42Hz (-10dB).
Cons: Rising frequency response but upper treble rolled off, 700hz and 1.2khz peaks
Full W-King D20 review and specifications →
| Amplifier Power | 200W |
|---|---|
| App | Yes (W-King app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~42Hz |
| Bluetooth Codecs | SBC |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.9" x 8.5" x 10.6" (506 x 217 x 270 mm) |
| Drivers | 4.5" + 3.5" drivers + 1.2" tweeters |
| EQ | Yes (App + button modes) |
| IP Rating | IPX6 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 14.3 lbs (6500 g) |
| Wireless Microphones | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400? More from alanrossreviews →
- Alan Ross Reviews: pound for pound battle! WKing X20 D20 vs Stormbox Blast! OMG its a shocker!
- Alan Ross Reviews: W-King X20 JBL Boombox 3 killer! this should be illegal! - I was shocked!
- Jagist reviews: LG xboom Stage 301 Vs W-king X20!!! More from Jagistreviews →
- Jagist reviews: W-king X20 Vs Jbl Encore!!! 😁😁😁
- Jagist reviews: W-king X20 Vs Skullcandy Barrel XT!!! 🤔😋
- Mateusz Cholewa: Soundcore RAVE 3 🤗v🆚s W- KING X20🎶 More from Mateusz Cholewa →
- Jay’s Straight Up Reviews & More: New! W-King X20 vs JBL Boombox 3 🛜 Head to Head 🔋Battery Powered 📊Custom EQ - Links In Description More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: W-King X20 vs Tribit Stormbox Blast 🍿 Garage Battle of Boombox Speakers 🍻Custom & Standard EQ’s
- Head-to-Head Comparisons