Short answer: the Boombox 3, for $149 more. It ranks #21 of 71 boombox speakers at $399; the X20 ranks #28 at $249.99.
The Boombox 3 wins on real features beyond tuning. IP67 water resistance, a genuine power bank function, and PartyBoost pairing with up to 100 compatible JBL speakers. Its measured weakness is dips in the mid bass and a peak at 700Hz.
The X20 competes on raw specs instead: a 7.5-inch subwoofer and 330W peak power, with cons limited to a rising frequency response and peaks at 700Hz and 1.2kHz.
Buy the Boombox 3 for the water resistance, the power bank, and JBL’s pairing ecosystem. Buy the X20 to save $149 if those features don’t matter to you.
Specifications Side By Side
| JBL Boombox 3 | W-King X20 | |
|---|---|---|
| Price | $399.00 | $249.99 after coupon |
| Ranked | #21 of 70 in Boombox Size Portable Bluetooth Speakers | #28 of 70 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 25ms | - |
| Bass Extension (-10dB) | 43Hz | ~42Hz |
| Battery Life | 24 hours (Manufacturer specified) | - |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | 100ms | - |
| Max Volume | 110dB | 112dB |
| Party Mode | Yes (PartyBoost up to 100 speakers) | No |
| Power Input | AC Power cable | USB-C |
| Stereo | Yes | Yes |
| TWS | Yes | Yes |
| Weight | 14.8 lbs / 6.7 kg | 15.9 lbs / 7200 g |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (W-King app) |
| EQ | No | Yes (App + button modes) |
| Power Bank | Yes | Yes |
| USB Playback | No | Yes |
| Built in Microphone | No | No |
| FM Tuner | No | - |
| Microphone Input | No | - |
| MicroSD Playback | No | Yes |
| Output Power | 180W AC / 136W battery | 330W peak / 200W RMS |
| Dimensions | 48.2cm x 25.7cm x 20cm | 50.6cm x 21.7cm x 27cm |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters | 7.5" subwoofer + drivers |
The Two Speakers In Full
JBL Boombox 3: $399.00 Amazon
Pros: IP67 rated. 24 hour battery life (6.5 hour charge time). Doubles as a power bank. PartyBoost links up to 100 compatible JBL speakers. Three-way speaker system with subwoofer.
Cons: Dips in mid bass range which makes the bass sound undefined, bass boosted, peaky at 700hz, not quite as good mids and treble as the Blast.
| App | No |
|---|---|
| Aux Input | Yes |
| Aux Latency | 25ms |
| Bass Extension (-10dB) | 43Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 100ms |
| Built in Microphone | No |
| Dimensions | 48.2cm x 25.7cm x 20cm |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| EQ | No |
| FM Tuner | No |
| IP Rating | IP67 |
| Max Volume | 110dB |
| MicroSD Playback | No |
| Microphone Input | No |
| Output Power | 180W AC / 136W battery |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | Yes |
| Power Input | AC Power cable |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 14.8 lbs / 6.7 kg |
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Earfun UBoom X vs JBL Boombox 3 - outdoor test
- Alan Ross Reviews: JBL Boombox 3 review vs JBL Boombox 2 a subwoofer and a 3 way equals heaven? 💋
- Alan Ross Reviews: W King T11 party boombox and Karaoke machine review vs T9, Stormbox Blast and Boombox 3.
- Dominik Reviews: JBL Boombox 3 vs 2x Tribit Stormbox Blast 🤑 Huge difference?
- Alan Ross Reviews: Not quite! JBL Authentics 300 review and sound test vs Boombox 3, Encore and Stormbox Blast
- Alan Ross Reviews: WiFi Edition: JBL Boombox 3 ultimate review! vs Boombox 3 Bluetooth edition
- Oluv Patreon: Earfun UBoom X vs JBL Boombox 3 - outdoor
- Jay’s Straight Up Reviews & More: Zealot ZE21 vs JBL Boombox 3 Tailgater Special @20ft. The Budget Beast Against the OG Boombox
- Jay’s Straight Up Reviews & More: Tribit Stormbox Blast 2 vs JBL Boombox 3 🔊 Got Bass? Let’s See How They Compare 😲 Battery Powered 🔋
- Picky Audio: SO CLOSE! Soundcore Boom 2 Plus vs JBL Boombox 3
- Picky Audio: Extended Sound Test (Soundcore Boom 2 Plus vs JBL Boombox 3)
- Alan Ross Reviews: W-King X20 JBL Boombox 3 killer! this should be illegal! - I was shocked!
- Jay’s Straight Up Reviews & More: New! W-King X20 vs JBL Boombox 3 🛜 Head to Head 🔋Battery Powered 📊Custom EQ - Links In Description
- Alan Ross Reviews: W-King X20 JBL Boombox 3 killer! this should be illegal! - I was shocked!
- Jay’s Straight Up Reviews & More: New! W-King X20 vs JBL Boombox 3 🛜 Head to Head 🔋Battery Powered 📊Custom EQ - Links In Description
- Alan Ross Reviews: Tronsmart Bang Max Review, JBL Boombox 3 wannabe 130w
- Jay’s Straight Up Reviews & More: Skullcandy BARREL XT vs JBL Boombox 3 🤯Budget Banger vs Reigning Champ 🔋 Battery Powered 🏠 Indoors
- Jay’s Straight Up Reviews & More: SONY ULT Field 7 💣vs JBL Boombox 3 🧨 Showdown! 🪇Let’s Shake it Up! 🔋Battery Powered Basement Battle
- AudioTribe: JBL Authentics 500 VS JBL Boombox 3 Sound Test Comparison
- Head-to-Head Comparisons
- JBL Boombox 3 vs JBL Boombox 4
- JBL Boombox 3 vs JBL Authentics 500
- JBL Boombox 3 vs Soundcore Boom 2 Plus
- JBL Boombox 3 vs Sony ULT Field 7
- JBL Boombox 3 vs Tribit Stormbox Blast 2
- JBL Boombox 3 vs JBL Authentics 300
- JBL Boombox 3 vs Zealot ZE21
- JBL Boombox 3 vs Tribit Stormbox Blast
- JBL Boombox 3 vs W-King T11
- Links
W-King X20: $249.99 after coupon Amazon
Pros: 200W RMS output with 330W peak power, 112dB max volume, exceptional 24-hour battery life with power bank, IPX6 waterproof, EQ with app control and button modes, 7.5-inch subwoofer, Bluetooth 5.3, dual pairing, MicroSD and USB playback, AUX input, TWS stereo mode with 240W combined
Cons: Rising frequency response but upper treble rolled off, 700hz and 1.2khz peaks
| App | Yes (W-King app) |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | ~42Hz |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Dimensions | 50.6cm x 21.7cm x 27cm |
| Drivers | 7.5" subwoofer + drivers |
| EQ | Yes (App + button modes) |
| IP Rating | IPX6 |
| Max Volume | 112dB |
| MicroSD Playback | Yes |
| Output Power | 330W peak / 200W RMS |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 15.9 lbs / 7200 g |
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400?
- 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: 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🎶
- Jay’s Straight Up Reviews & More: New! W-King X20 vs JBL Boombox 3 🛜 Head to Head 🔋Battery Powered 📊Custom EQ - Links In Description
- Jay’s Straight Up Reviews & More: W-King X20 vs Tribit Stormbox Blast 🍿 Garage Battle of Boombox Speakers 🍻Custom & Standard EQ’s
- Jagist reviews: LG xboom Stage 301 Vs W-king X20!!!
- Techder Audios: W-king X20 VS Zealot S95 DEEP BASS VS DEEPER & LOUDER BASS?!
- Jagist reviews: LG xboom Stage 301 Vs W-king X20!!!
- Jagist reviews: W-king X20 Vs Gemini GRV-650L!!! 😍😍😍
- Jagist reviews: Bugani Boost Max Vs W-king X20!!! 😍😍😍
- Jay’s Straight Up Reviews & More: W-King X20 vs Zealot S78 Bluetooth Boombox Battle Outdoor Tailgater Special 🚗 Let the Whoopin’ Begin
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.