Short answer: the Sony ULT Field 3 for better sound quality, the W-King D8 Mini for the lower price. The Sony XB33 ranks higher than the W-King D8 Mini (#77 vs #135 of 175 medium speakers) but is discontinued. Its replacement, the Sony ULT Field 3, is rated 3.4/5 at $208; the W-King D8 Mini is rated 2.6/5 at $49.99, $158.01 cheaper.
The Sony XB33 is the better-sounding, deeper-bass choice. IP67 rated and lightweight (2.4 lb). Its bass reaches about 50Hz before falling 10dB, against 63Hz for the W-King D8 Mini. The tradeoff: Not very loud.
The W-King D8 Mini is the louder pick. 30W output with switchable indoor/outdoor EQ modes. Alan Ross Reviews measured it at 100dB at full volume, against 97dB for the Sony XB33. It keeps a wired aux input, which the Sony XB33 lacks. The tradeoff: Recessed midrange, harsh treble.
Buy the W-King D8 Mini if price matters most. For better sound quality, the Sony ULT Field 3, the replacement for the discontinued Sony XB33, is rated higher but costs $208.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony XB33 | W-King D8 Mini | |
|---|---|---|
| Price | $110 Discontinued | $49.99 |
| Ranked | #77 of 175 in Medium Size Portable Bluetooth Speakers | #135 of 175 in Medium Size Portable Bluetooth Speakers |
| App | Yes (Sony Music Connect App) | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 50Hz | 63Hz |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Bluetooth Latency | 110ms | - |
| EQ | Yes (3 band) | Yes (2 modes - Indoor/Outdoor) |
| IP Rating | IP67 | IPX6 |
| Maximum SPL | 97dB (measured by Alan Ross Reviews) | 100dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | Yes (USB-A) | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 2.4 lbs (1.1 kg) | 2.8 lbs (1260 g) |
| Bluetooth Version | 5.0 | 5.0 |
| Dimensions | 9.7” x 3.8” x 4.2” (246 x 97 x 106 mm) | 9.9” x 3.7” x 3.7” (251 x 94 x 94 mm) |
| Amplifier Power | 16W RMS | 30W |
| Drivers | 2x 48x70mm X-Balanced racetrack drivers + 2x passive radiators | 2x 70mm woofers, 2x 30mm tweeters |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Power Input | USB-C | USB-C |
| TWS | Yes | No |
| MicroSD Playback | - | Yes |
| Built-in Microphone | - | Yes |
Related Speaker Comparisons
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- JBL Charge 6 vs Sony XB33
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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
Sony XB33: $110 Discontinued eBay
Newer model: the Sony ULT Field 3, ranked higher, rated 3.4/5, released Apr 2025.
Older models: the Sony SRS-XB31 (ranked lower, rated 2.8/5) and the Sony SRS-XB30 (ranked lower, rated 2.6/5). See every Sony XB and ULT generation.
Pros: IP67 rated and lightweight (2.4 lb). App-controlled color LED lighting, Party Connect links up to 100 speakers. ~19 hour real-world battery without lights. Measured bass extension of 50Hz (-10dB).
Cons: Not very loud. Upper bass peaks, midrange dip, upper midrange peaks, not very neutral. Speaker will not remain at max volume and will turn itself down automatically. Discontinued.
Full Sony XB33 review and specifications →
| Released | May 2020 (6 years ago) |
|---|---|
| Amplifier Power | 16W RMS |
| App | Yes (Sony Music Connect App) |
| Aux Input | No |
| Bass Extension (-10dB) | 50Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Latency | 110ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 9.7” x 3.8” x 4.2” (246 x 97 x 106 mm) |
| Drivers | 2x 48x70mm X-Balanced racetrack drivers + 2x passive radiators |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Lights | Yes |
| Maximum SPL | 97dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.4 lbs (1.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Sony XB33 vs XB32 vs JBL Charge 4 best £120 bluetooth speaker? More from alanrossreviews →
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- GYMCADDY: Sony XE300 Review And Compared to Sony XB33 - A Muffled Mess More from GYMCADDY →
- Head-to-Head Comparisons
W-King D8 Mini: $49.99 W-King $49.99 eBay
Pros: 30W output with switchable indoor/outdoor EQ modes. IPX6 rated with a 5000mAh battery. Measured bass extension of 63Hz (-10dB).
Cons: Recessed midrange, harsh treble. Bass doesn’t go as deep as others.
Full W-King D8 Mini review and specifications →
| Released | Feb 2020 (6 years ago) |
|---|---|
| Amplifier Power | 30W |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.9” x 3.7” x 3.7” (251 x 94 x 94 mm) |
| Drivers | 2x 70mm woofers, 2x 30mm tweeters |
| EQ | Yes (2 modes - Indoor/Outdoor) |
| IP Rating | IPX6 |
| Maximum SPL | 100dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 2.8 lbs (1260 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- W-King D8 Mini vs Sony SRS-XB30
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- W-King D8 Mini vs Tribit Stormbox Mini+
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