Short answer: the Marshall Tufton, if you are buying new, though neither ranks well in its class. The Diamondboxx M3 ranks higher than it (#66 vs #75 of 89 boombox speakers, 2.8/5 vs 2.4/5) but is discontinued, so only consider it used; the Marshall Tufton is still sold new at $378.99. Both are rated below 3.0/5 among the 89 boombox speakers, so if sound quality matters, consider the Tribit Stormbox Blast instead, ranked #2 at $179.99.
Why pick the Diamondboxx M3: 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. Watch for: Despite its output, bass does not reach as deep as the best large portables and can distort when pushed hard.
Why pick the Marshall Tufton: 20 hour battery life; 2.5 hour full charge, or 20-min quick-charge for 4 hours of play. Watch for: Not much lower bass, upper bass boomy, boosted treble, not very balanced overall.
Buy the Marshall Tufton if you want one new; the Diamondboxx M3 is discontinued, so only look for it used.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Diamondboxx M3 | Marshall Tufton | |
|---|---|---|
| Price | $700 Discontinued | $378.99 |
| Ranked | #66 of 89 in Boombox Size Portable Bluetooth Speakers | #75 of 89 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 40 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| IP Rating | None | IPX2 |
| Stereo | Yes | No |
| Omnidirectional | No | Yes |
| Weight | 11 lbs (5 kg) | 10.8 lbs (4.9 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | No |
| EQ | No | Yes (hidden bass and treble adjustment) |
| TWS | Yes | No |
| Party Mode | No | No |
| Power Bank | No | No |
| USB Playback | No | No |
| Built-in Microphone | No | Yes |
| Power Input | USB-C | USB-C |
| FM Tuner | No | - |
| Amplifier Power | 200W RMS / 400W peak | 80W |
| Dimensions | 14.7” x 9” x 8” (373.4 x 228.6 x 203.2 mm) | 9” x 6.4” x 13.8” (229.1 x 163.1 x 350 mm) |
| Drivers | 3” woofer + tweeter array | 1x 5.25” woofer + 2x 2” full-range + 1x 16mm tweeter |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 42Hz |
| Strap | - | Yes (built-in strap) |
Related Speaker Comparisons
More worthwhile head-to-heads for Diamondboxx M3:
- Tribit Stormbox Blast vs Diamondboxx M3
- JBL Partybox Encore 2 vs Diamondboxx M3
- JBL Partybox Encore Essential 2 vs Diamondboxx M3
- Diamondboxx M3 vs JBL Partybox Encore
- JBL Partybox Encore Essential vs Diamondboxx M3
Prices on this page were last checked September 30, 2026 at 2:57 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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The Two Speakers In Full
Diamondboxx M3: $700 Discontinued 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. Discontinued.
Full Diamondboxx M3 review and specifications →
| Amplifier Power | 200W RMS / 400W peak |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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
- Diamondboxx M3 vs Demerbox DB2
- Diamondboxx M3 vs Turtlebox Grande
- Diamondboxx M3 vs Bumpboxx Flare 6
- Diamondboxx M3 vs EcoXGear Defender
- Diamondboxx M3 vs JBL Partybox On the Go
- Diamondboxx M3 vs Onn Medium Party Speaker Gen 2
- Diamondboxx M3 vs Soundcore Rave Party 2
- See all 44 comparisons
Marshall Tufton: $378.99 Amazon eBay
Pros: 20 hour battery life; 2.5 hour full charge, or 20-min quick-charge for 4 hours of play. 3-way speaker design covers full frequency range in 360°. Sturdy construction with IPX2 rating. Measured bass extension of 42Hz (-10dB).
Cons: Not much lower bass, upper bass boomy, boosted treble, not very balanced overall. Not as loud as others in the class. Very low water rating
Full Marshall Tufton review and specifications →
| Amplifier Power | 80W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 42Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9” x 6.4” x 13.8” (229.1 x 163.1 x 350 mm) |
| Drivers | 1x 5.25” woofer + 2x 2” full-range + 1x 16mm tweeter |
| EQ | Yes (hidden bass and treble adjustment) |
| IP Rating | IPX2 |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| USB Playback | No |
| Weight | 10.8 lbs (4.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons