These sit in different size classes, so this is not a straight ranking comparison. The Sony ULT Field 5 ranks #59 of 120 large speakers by sound quality at $348; the W-King X20 ranks #43 of 113 boombox speakers by sound quality at $229.99.
The Sony ULT Field 5 is the lighter option. A tough, waterproof party speaker with loud, bass focused output, an aux input, a power bank and a long battery. At 7.3 lbs (3.3 kg) it weighs much less than the W-King X20 at 15.9 lbs (7.2 kg). It supports LDAC Bluetooth, which the W-King X20 lacks. It links with other speakers (Party Connect up to 100 speakers), which the W-King X20 cannot. Watch for: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth.
Why pick the W-King X20: A loud stereo party speaker with a large subwoofer, a 24 hour battery with power bank, and water resistance. Watch for: Rising frequency response but upper treble rolled off, 700Hz and 1.2kHz peaks.
Buy the Sony ULT Field 5 at $348 if you want a large speaker. Buy the W-King X20 at $229.99 if you want a boombox speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Sony ULT Field 5 | W-King X20 | |
|---|---|---|
| Price | $348.00 | $229.99 after coupon |
| Ranked | #59 of 120 in Large Size Portable Bluetooth Speakers | #43 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (W-King app) |
| Aux Input | Yes | Yes |
| Battery Life | 25 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 5.4 |
| Built-in Microphone | Yes | No |
| Dimensions | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 7.5” subwoofer + drivers |
| EQ | Yes (App + ULT button) | Yes (App + button modes) |
| IP Rating | IP67 | IPX6 |
| Party Mode | Yes (Party Connect up to 100 speakers) | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 kg) | 15.9 lbs (7200 g) |
| Amplifier Power | 27W | 330W peak / 200W RMS |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Bass Extension (-10dB) | - | ~42Hz |
| Maximum SPL | - | 112dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
| USB Playback | - | Yes |
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