Short answer: the Sony ULT Field 5 on measured sound quality, the W-King D9 on price. The Sony ULT Field 5 ranks #41 of 77 large speakers at $198. The W-King D9 ranks #65 at $71.24, $126.76 cheaper.
What the Sony ULT Field 5 offers: IP67 rated, dustproof and water resistant. 25 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone. Watch for: Bass not as deep as others in the category, and sound quality overall is just okay. ULT button makes a really loud tone when pressed. Just an okay speaker.
What the W-King D9 offers: 60W RMS output, 106dB max volume, exceptional 40-hour battery life, power bank function, IPX6 waterproof, MicroSD and AUX support, dual drivers with passive radiators, Bluetooth 5.3, USB-C charging, EQ button, shockproof design Watch for: Very rolled off treble.
Buy the Sony ULT Field 5 if sound quality matters more than the price. Buy the W-King D9 if the price matters more than sound quality.
Skip the W-King D9 if sound quality matters to you. It ranks near the bottom of the 77 large speakers.
If battery life is a priority, the W-King D9 is rated for 40 hours versus 25 hours for the Sony ULT Field 5.
Specifications Side By Side
| Sony ULT Field 5 | W-King D9 | |
|---|---|---|
| Price | $198 | $71.24 |
| Ranked | #41 of 77 in Large Size Portable Bluetooth Speakers | #65 of 77 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 25 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 5.3 |
| Built in Microphone | Yes | Yes |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) | 4.7" x 12.4" x 4.7" (120 x 315 x 120 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 2x 40mm drivers + passive radiators |
| EQ | Yes (App + ULT button) | No |
| 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 | No |
| Weight | 7.3 lbs / 3.3 kg | 4.4 lbs / 2.0 kg |
| Output Power | 27W | 60W RMS |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 47Hz |
| Max Volume | - | 106dB |
| MicroSD Playback | - | Yes |
| Frequency Response | - | 80Hz - 16kHz (Manufacturer specified) |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Soundcore Rave Neo 2 vs Sony SRS-XB43
- LG Xboom Bounce vs Sony SRS-XB43
- Sony SRS-XB43 vs Dockin D Fine
- Bose SoundLink Plus vs W-King D9
- Marshall Stockwell 2 vs W-King D9
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Sony ULT Field 5: $198 Amazon eBay
Pros: IP67 rated, dustproof and water resistant. 25 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone.
Cons: Bass not as deep as others in the category, and sound quality overall is just okay. ULT button makes a really loud tone when pressed. Just an okay speaker.
Full Sony ULT Field 5 review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6" x 5.7" x 4.9" (320 x 144 x 125 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Output Power | 27W |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 7.3 lbs / 3.3 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Danny Pops: Don’t TOUCH that ULT Button! Sony ULT Field 5 Review More from DannyPops →
- Mark Ellis Reviews: Sony just changed summer sound 🤨 | Sony ULT Field 5 & 3 Review
- Dominik Reviews: Sony ULT Field 5 vs JBL Xtreme 4 - Outdoor Sound Test - Sony shines or not? More from Dominik Reviews →
- Joy & Oluv’Sone: Sony ULT Field 5 vs Anker SoundCore Boom 2 - listening test More from Oluv’Sone →
- Reddit Search for Sony ULT Field 5 Review
- Head-to-Head Comparisons
- Sony ULT Field 5 vs Sony SRS-XB43
- Sony ULT Field 5 vs W-King D8
- Sony ULT Field 5 vs JBL Xtreme 2
- Sony ULT Field 5 vs W-King T9
- Sony ULT Field 5 vs JBL Xtreme 4
- Sony ULT Field 5 vs Marshall Kilburn II
- Sony ULT Field 5 vs Zealot S97
- Sony ULT Field 5 vs Harman Kardon Onyx Studio 4
- See all 46 comparisons
W-King D9: $71.24 Amazon eBay
Pros: 60W RMS output, 106dB max volume, exceptional 40-hour battery life, power bank function, IPX6 waterproof, MicroSD and AUX support, dual drivers with passive radiators, Bluetooth 5.3, USB-C charging, EQ button, shockproof design
Cons: Very rolled off treble.
Full W-King D9 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 47Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.7" x 12.4" x 4.7" (120 x 315 x 120 mm) |
| Drivers | 2x 40mm drivers + passive radiators |
| EQ | No |
| Frequency Response | 80Hz - 16kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Max Volume | 106dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 60W RMS |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 4.4 lbs / 2.0 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons