Short answer: the W-King X20. It ranks #28 of 73 boombox speakers by sound quality at $219.98; the JBL Authentics 300 ranks #30 and costs $299.95, so there is little reason to consider the other one.
What the W-King X20 offers: 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 Watch for: Rising frequency response but upper treble rolled off, 700hz and 1.2khz peaks
What the JBL Authentics 300 offers: Integrates both Amazon Alexa and Google Assistant simultaneously (rare for smart speakers). Retro seventies design with leather and Quadrex grille. 100-watt amp, carries well with leather-trimmed handle. Rechargeable battery rated ~8 hours. Watch for: Narrow sounding, bass not as deep as others. Peaky upper mids. No TWS. No IP rating. Not as loud as others. Not much battery life.
Buy the W-King X20. It ranks higher for sound quality than the JBL Authentics 300 and costs less, which settles it without a real tradeoff to make.
There is a real gap in water resistance: the W-King X20 at IPX6 (powerful water jets) against the JBL Authentics 300, which has no water resistance.
Specifications Side By Side
| W-King X20 | JBL Authentics 300 | |
|---|---|---|
| Price | $219.98 after coupon | $299.95 |
| Ranked | #28 of 73 in Boombox Size Portable Bluetooth Speakers | #30 of 73 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (W-King app) | Yes |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | ~42Hz | 45Hz |
| EQ | Yes (App + button modes) | Yes (App EQ) |
| IP Rating | IPX6 | None |
| Max Volume | 112dB | 100dB |
| MicroSD Playback | Yes | No |
| Power Bank | Yes (USB-A) | No |
| Power Input | USB-C | AC Power cable |
| Stereo | Yes | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Party Mode | No | Yes (Wi-Fi Multi-Room) |
| Built in Microphone | No | Yes |
| Output Power | 330W peak / 200W RMS | 100W |
| Dimensions | 19.9" x 8.5" x 10.6" (506 x 217 x 270 mm) | 13.5" x 7.7" x 7.1" (342 x 195.6 x 180.3 mm) |
| Drivers | 7.5" subwoofer + drivers | 1" tweeter + 4" woofer + passive radiators |
| Weight | 15.9 lbs / 7200 g | 10.8 lbs / 4.9 kg |
| Digital Aux Input | No | No |
| Battery Life | - | 8 hours (Manufacturer specified) |
| Wifi | - | Yes |
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- JBL Partybox Encore 2 vs W-King D20
- Tribit Stormbox Blast 2 vs W-King X20
- W-King X20 vs JBL Partybox On the Go
Prices on this page were last checked August 27, 2026 at 10:09 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
W-King X20: $219.98 after coupon Amazon eBay
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
Full W-King X20 review and specifications →
| 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 | 7.5" subwoofer + drivers |
| EQ | Yes (App + button modes) |
| IP Rating | IPX6 |
| Max Volume | 112dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 330W peak / 200W RMS |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 15.9 lbs / 7200 g |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400? More from alanrossreviews →
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- 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!!! 😁😁😁 More from Jagistreviews →
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- 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
- Jagist reviews: LG xboom Stage 301 Vs W-king X20!!!
- Techder Audios: W-king X20 VS Zealot S95 DEEP BASS VS DEEPER & LOUDER BASS?! More from techderaudios →
- Jagist reviews: LG xboom Stage 301 Vs W-king X20!!!
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- Reddit Search for W-King X20 Review
- Head-to-Head Comparisons
JBL Authentics 300: $299.95 Amazon eBay
Pros: Integrates both Amazon Alexa and Google Assistant simultaneously (rare for smart speakers). Retro seventies design with leather and Quadrex grille. 100-watt amp, carries well with leather-trimmed handle. Rechargeable battery rated ~8 hours.
Cons: Narrow sounding, bass not as deep as others. Peaky upper mids. No TWS. No IP rating. Not as loud as others. Not much battery life.
Full JBL Authentics 300 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 13.5" x 7.7" x 7.1" (342 x 195.6 x 180.3 mm) |
| Drivers | 1" tweeter + 4" woofer + passive radiators |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Max Volume | 100dB |
| MicroSD Playback | No |
| Omnidirectional | No |
| Output Power | 100W |
| Party Mode | Yes (Wi-Fi Multi-Room) |
| Power Bank | No |
| Power Input | AC Power cable |
| Stereo | Partially (1 woofer) |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 10.8 lbs / 4.9 kg |
| Wifi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- JOY‘s 🎧3D🔈Audio-Show: JBL Authentics 300 - sound quality test More from Oluv’Sone →
- Oluv Patreon: JBL Authentics 300 - update
- Oluv Patreon: JBL Authentics 300 - listening session
- Alan Ross Reviews: Not quite! JBL Authentics 300 review and sound test vs Boombox 3, Encore and Stormbox Blast More from alanrossreviews →
- Reddit Search for JBL Authentics 300 Review
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