Short answer: the W-King D20. It ranks #39 of 98 boombox speakers by sound quality, rated 3.6/5, at $193; the Sony ULT Field 7 ranks #59, rated 3.2/5, and costs $448.99, which makes this an easy call rather than a real tradeoff.
The W-King D20 is the better-sounding, deeper-bass choice. Comes with 2 wireless microphones. Its bass reaches about 42Hz before falling 10dB, against 52Hz for the Sony ULT Field 7. The catch: Rising frequency response but upper treble rolled off, 700Hz and 1.2kHz peaks.
What the Sony ULT Field 7 does well: It supports LDAC Bluetooth, which the W-King D20 lacks. It links with other speakers (Party Connect up to 100 speakers), which the W-King D20 cannot. The tradeoff: A peak around 8kHz, and bass does not reach as deep as the top-ranked speakers.
Buy the W-King D20. It is rated higher for sound quality than the Sony ULT Field 7 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| W-King D20 | Sony ULT Field 7 | |
|---|---|---|
| Price | $193 | $448.99 |
| Ranked | #39 of 98 in Boombox Size Portable Bluetooth Speakers | #59 of 98 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (W-King app) | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~42Hz | ~52Hz |
| EQ | Yes (App + button modes) | Yes (App + ULT button) |
| IP Rating | IPX6 | IP67 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | - |
| Wireless Microphones | Yes | - |
| Power Bank | Yes | Yes (USB-A, 5V/1.5A) |
| Power Input | USB-C | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Built-in Microphone | No | Yes |
| Amplifier Power | 200W | 100W |
| Dimensions | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) | 20.2” x 8.8” x 8.7” (512 x 224 x 222 mm) |
| Drivers | 4.5” + 3.5” drivers + 1.2” tweeters | 2x 114mm x 114mm X-Balanced woofers + 2x 46mm (1.9”) tweeters |
| Weight | 14.3 lbs (6500 g) | 13.9 lbs (6.3 kg) |
| Digital Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth Version | 5.3 | 5.2 |
| Guitar Input | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Strap | - | No |
Related Speaker Comparisons
More top alternatives to W-King D20:
- Tribit Stormbox Blast vs W-King D20
- Harman Kardon Go + Play 3 vs W-King D20
- JBL Partybox Encore 2 vs W-King D20
- JBL Partybox Encore Essential 2 vs W-King D20
- JBL Partybox Encore vs W-King D20
Prices on this page were last checked October 12, 2026 at 4:13 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 D20: $193 AliExpress $193 eBay
Pros: Comes with 2 wireless microphones. Measured bass extension of ~42Hz (-10dB).
Cons: Rising frequency response but upper treble rolled off, 700Hz and 1.2kHz peaks
Full W-King D20 review and specifications →
| Released | Feb 2024 (2 years ago) |
|---|---|
| Amplifier Power | 200W |
| App | Yes (W-King app) |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~42Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 4.5” + 3.5” drivers + 1.2” tweeters |
| EQ | Yes (App + button modes) |
| IP Rating | IPX6 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 14.3 lbs (6500 g) |
| Wireless Microphones | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: pound for pound battle! WKing X20 D20 vs Stormbox Blast! OMG its a shocker! More from alanrossreviews →
- Alan Ross Reviews: W-King X20 JBL Boombox 3 killer! this should be illegal! - I was shocked!
- Alan Ross Reviews: Soundcore Boom 2 Plus Review - worst boombox speaker under $400?
- 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!!! More from Jagistreviews →
- Jagist reviews: W-king X20 Vs Jbl Encore!!! 😁😁😁
- Jagist reviews: W-king X20 Vs Skullcandy Barrel XT!!! 🤔😋
- Head-to-Head Comparisons
Sony ULT Field 7: $448.99 Amazon $448.99 Lowest Sony $499.99 eBay
Older model: the Sony SRS-XG500 (ranked lower, rated 3/5). See every Sony XB and ULT generation.
Same family: the Sony ULT Field 1 (smaller model, rated 3.1/5), the Sony ULT Tower 10 (larger model, rated 3.9/5), the Sony ULT Field 3 (larger model, rated 3.4/5), the Sony ULT Field 5 (larger model, rated 3.5/5), the Sony ULT Tower 5 (larger model, rated 4.5/5), the Sony ULT Tower 7 (larger model, rated 4.7/5), the Sony ULT Tower 9 (larger model, rated 4.2/5) and the Sony ULT Tower Max (larger model, rated 4.8/5).
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 →
| Released | Apr 2024 (2 years ago) |
|---|---|
| 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
- Dominik Reviews: Sony ULT Field 7 vs Tribit Stormbox Blast Both good? 😂 More from Dominik Reviews →
- Jay’s Straight Up Reviews & More: SONY ULT Field 7 💣vs JBL Boombox 3 🧨 Showdown! 🪇Let’s Shake it Up! 🔋Battery Powered Basement Battle More from JaysStraightUpReviews →
- Jagist reviews: Xdobo Wow Max Vs Sony Ult Field 7!!! More from Jagistreviews →
- Head-to-Head Comparisons
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- Sony ULT Field 7 vs Onn Medium Party Speaker Gen 2
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- Sony ULT Field 7 vs Sony SRS-XG500
- See all 86 comparisons