Short answer: the W-King X20S. It ranks #30 of 91 boombox speakers by sound quality, rated 3.8/5, at $150.99; the Sony ULT Field 7 ranks #56, rated 3.2/5, and costs $400, so there is not much of a tradeoff to weigh.
The W-King X20S is the better-sounding option. Clearer and smoother than the larger W-King X20 at about half its size and weight, and in side by side tests it held its own against the Harman Kardon Go + Play 3, with nicer, more exposed mids and more volume. The tradeoff: Less bass and depth than the X20 and about 3dB quieter, and at maximum volume its mids and highs start to drown out the bass.
Why pick the Sony ULT Field 7: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. The tradeoff: Bass is limited by its ~52Hz specification.
Buy the W-King X20S. It is rated higher for sound quality than the Sony ULT Field 7 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| W-King X20S | Sony ULT Field 7 | |
|---|---|---|
| Price | $150.99 | $400 |
| Ranked | #30 of 91 in Boombox Size Portable Bluetooth Speakers | #56 of 91 in Boombox Size Portable Bluetooth Speakers |
| Amplifier Power | 140W RMS (180W peak) | 100W |
| IP Rating | IPX7 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.4 | 5.2 |
| Built-in Microphone | Yes | Yes |
| Aux Input | Yes | Yes |
| USB Playback | Yes | Yes |
| MicroSD Playback | Yes | - |
| FM Tuner | Yes | - |
| Weight | 13.8 lbs (6.25 kg) | 13.9 lbs (6.3 kg) |
| Strap | Yes (detachable shoulder strap) | No |
| TWS | Yes | Yes |
| Omnidirectional | No | No |
| Bass Extension (-10dB) | - | ~52Hz |
| Battery Life | - | 30 hours (Manufacturer specified) |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | Yes (USB-A, 5V/1.5A) |
| Power Input | - | AC Power cord |
| Stereo | - | Yes |
| Bluetooth Codecs | - | SBC, AAC, LDAC |
| App | - | No |
| EQ | - | Yes (App + ULT button) |
| Dimensions | - | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | - | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Digital Aux Input | - | No |
Related Speaker Comparisons
How W-King X20S compares with other leading options:
- Tribit Stormbox Blast vs W-King X20S
- Harman Kardon Go + Play 3 vs W-King X20S
- JBL Partybox Encore 2 vs W-King X20S
- JBL PartyBox On-The-Go 2 Plus vs W-King X20S
- JBL Partybox Encore Essential 2 vs W-King X20S
Prices on this page were last checked October 4, 2026 at 9:58 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 X20S: $150.99 AliExpress W-King eBay
Pros: Clearer and smoother than the larger W-King X20 at about half its size and weight, and in side by side tests it held its own against the Harman Kardon Go + Play 3, with nicer, more exposed mids and more volume. 140W RMS (180W peak), IPX7, Bluetooth 5.4, a built-in microphone, TF card, USB and aux playback, FM radio, a carry handle and a shoulder strap.
Cons: Less bass and depth than the X20 and about 3dB quieter, and at maximum volume its mids and highs start to drown out the bass. With a flat EQ the bass is cut off, so it needs the bass boost. The JBL PartyBox Encore Essential 2 sounded better in a direct comparison. Sold direct from W-King in the US.
Full W-King X20S review and specifications →
| Amplifier Power | 140W RMS (180W peak) |
|---|---|
| Aux Input | Yes |
| Bluetooth | Yes |
| Bluetooth Version | 5.4 |
| Built-in Microphone | Yes |
| FM Tuner | Yes |
| IP Rating | IPX7 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.8 lbs (6.25 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: W-king X20 Vs W-king X20S!!! More from Jagistreviews →
- Jagist reviews: W-king X20s Vs Harman Kardon Go Plus Play 3!!!
- Mateusz Cholewa: 140W W-KING X20S vs 160W HK Go Plus Play 3 More from Mateusz Cholewa →
- Jagist reviews: Jbl Encore Essential 2 Vs W-king X20s!!!
- Jagist reviews: W-king X20s Vs Tribit Stormbox Blast!!!
- Head-to-Head Comparisons
Sony ULT Field 7: $400 Amazon eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5).
Smaller model: the Sony ULT Field 1 (rated 3.1/5).
Larger model: the Sony ULT Tower 10 (rated 3.9/5).
Pros: Sony ULT Field 7 uses 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters. Its 6.3 kg, claimed 30 hours (Manufacturer specified) battery life, IP67 protection, aux input and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of ~52Hz (-10dB).
Cons: Bass is limited by its ~52Hz specification. There is no companion app. A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Full Sony ULT Field 7 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~52Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| EQ | Yes (App + ULT button) |
| Guitar Input | Yes |
| IP Rating | IP67 |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.9 lbs (6.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 7 vs Skullcandy Barrel
- Sony ULT Field 7 vs Soundcore Rave Party 2
- Sony ULT Field 7 vs Yeahbox Sonic Boom Max 3
- Sony ULT Field 7 vs Teufel Boomster NG (2017)
- Sony ULT Field 7 vs Onn Medium Party Speaker Gen 2
- Sony ULT Field 7 vs JBL Partybox On the Go
- Sony ULT Field 7 vs Sony SRS-XG500
- Sony ULT Field 7 vs Gemini GRV-650L
- See all 85 comparisons