Short answer: the JBL Partybox Encore. It ranks #6 of 75 boombox speakers by sound quality at $230; the Diamondboxx M3 ranks #53 and costs $700, so there is not much of a tradeoff to weigh.
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 JBL Partybox Encore offers: JBL Partybox Encore uses 135mm woofer + 2x 20mm tweeters. Its 6.3 kg, claimed 6 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 110dB and stereo playback make it a practical option for its intended room or portable use. Watch for: Bass is limited by its 38Hz specification.
Buy the JBL Partybox Encore. It ranks higher for sound quality than the Diamondboxx M3 and costs less, which settles it without a real tradeoff to make.
Battery life favors the Diamondboxx M3: rated for 40 hours against 6 hours for the JBL Partybox Encore.
Water resistance is not close: the JBL Partybox Encore is rated at IPX4 (splashing), well ahead of the Diamondboxx M3 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Diamondboxx M3 | JBL Partybox Encore | |
|---|---|---|
| Price | $700 | $230 |
| Ranked | #53 of 75 in Boombox Size Portable Bluetooth Speakers | #6 of 75 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 40 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| IP Rating | None | IPX4 |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 11 lbs (5 kg) | 13.9 lbs (6.3 kg) |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (JBL PartyBox app) |
| EQ | No | Yes (3 band App EQ) |
| TWS | Yes | Yes |
| Party Mode | No | Yes (PartyBoost up to 100 speakers) |
| Power Bank | No | Yes (USB-A, 5V/1.5A) |
| USB Playback | No | Yes |
| Built-in Microphone | No | No |
| Power Input | USB-C | AC Power cord |
| FM Tuner | No | - |
| Amplifier Power | 200W RMS / 400W peak | 100W RMS |
| Dimensions | 14.7" x 9" x 8" (373.4 x 228.6 x 203.2 mm) | 10.9" x 12.9" x 11.5" (276 x 327 x 293 mm) |
| Drivers | 3" woofer + tweeter array | 135mm woofer + 2x 20mm tweeters |
| Digital Aux Input | No | No |
| Aux Latency | - | 17ms |
| Bass Extension (-10dB) | - | 38Hz |
| Bluetooth Latency | - | 100ms |
| Maximum SPL | - | 110dB (measured by Alan Ross Reviews) |
| Wireless Microphones | - | Yes 2 Included |
| Bluetooth Version | - | 5.1 |
Related Speaker Comparisons
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- Harman Kardon Go + Play 3 vs JBL Partybox Encore
- JBL Partybox Encore vs JBL Partybox Encore 2
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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.
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JBL Partybox Encore: $230 Walmart eBay
Pros: JBL Partybox Encore uses 135mm woofer + 2x 20mm tweeters. Its 6.3 kg, claimed 6 hours (Manufacturer specified) battery life, IPX4 protection, aux input, up to 110dB and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of 38Hz (-10dB).
Cons: Bass is limited by its 38Hz specification.
Full JBL Partybox Encore review and specifications →
| Amplifier Power | 100W RMS |
|---|---|
| App | Yes (JBL PartyBox app) |
| Aux Input | Yes |
| Aux Latency | 17ms |
| Bass Extension (-10dB) | 38Hz |
| Battery Life | 6 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 100ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 10.9" x 12.9" x 11.5" (276 x 327 x 293 mm) |
| Drivers | 135mm woofer + 2x 20mm tweeters |
| EQ | Yes (3 band App EQ) |
| IP Rating | IPX4 |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
| Wireless Microphones | Yes 2 Included |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL giving it to us large! The good, The bad, The diabolical! More from alanrossreviews →
- Joy & Oluv’Sone: JBL Partybox Encore vs Earfun UBoom X: outdoors More from Oluv’Sone →
- Joy & Oluv’Sone: JBL Partybox Encore vs Earfun UBoom X: indoors
- M1M Tech Channel: JBL Partybox Encore 2 Ein fettes Bass Upgrade More from M1MTechChannel →
- Alan Ross Reviews: This changed my opinion on JBL speakers!
- DLX Willington: Called It!🤣 JBL Partybox Encore VS Essential, with binaural sound sample. More from DLXWillington →
- True Techy: BOSE S1 Pro vs JBLPartybox ENCORE This Comparison SHOCKED me!!!
- Jay’s Straight Up Reviews & More: Skullcandy Barrel XT Boombox vs. JBL Partybox Encore Party Speaker.🛜 How Low Can You Go?😲 More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: Tronsmart Halo 200 vs JBL Partybox Encore 🔊 Sound Check & Wireless Microphone test 🔋 Battery Powered
- Jay’s Straight Up Reviews & More: ONN Large Party Speaker Gen 2 vs JBL Partybox Encore 🛻 Tailgater Special 🔋 Battery Powered
- Dominik Reviews: Soundcore Rave 3 vs JBL Partybox Encore - Quick Sound Test! 🤗 More from Dominik Reviews →
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