Short answer: the W-King D8. Both are rated 3.5/5 for sound quality (#57 and #55 of 105 large speakers), and the W-King D8 costs $69.99 against $348 for the Sony ULT Field 5, so with nothing between them on sound quality, price settles it.
The case for the Sony ULT Field 5: A tough 7.3 lbs (3.3 kg) portable with IP67 protection, LDAC/AAC support, aux input, a 10-band app EQ, Party Connect, USB-C power-bank output and a claimed 25-hour battery. It supports LDAC Bluetooth, which the W-King D8 lacks. It links with other speakers (Party Connect up to 100 speakers), which the W-King D8 cannot. It has an adjustable EQ, which the W-King D8 lacks. The catch: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth.
The W-King D8 is the lighter choice. Claimed 24 hours (manufacturer specified) battery life, ipx7 protection, up to 101db and stereo playback make its feature set practical for its intended room or portable use. At 5.4 lbs (2.43 kg) it weighs noticeably less than the Sony ULT Field 5 at 7.3 lbs (3.3 kg).
Buy the W-King D8. Both are rated the same for sound quality, and it costs $278.01 less than the Sony ULT Field 5.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony ULT Field 5 | W-King D8 | |
|---|---|---|
| Price | $348.00 | $69.99 |
| Ranked | #55 of 105 in Large Size Portable Bluetooth Speakers | #57 of 105 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| 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 | 5.0 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) | 12.6” x 4.8” x 4.7” (320 x 121.9 x 119.4 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 2x 70mm woofers + 2x 31mm tweeters + passive radiators |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IPX7 |
| 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) | 5.4 lbs (2.43 kg) |
| Amplifier Power | 27W | 90W max / 50W RMS |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Bass Extension (-10dB) | - | 49Hz |
| Maximum SPL | - | 101dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
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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 ULT Field 5: $348.00 Amazon $348.00 eBay
Older models: the Sony SRS-XB43 (ranked lower, rated 3.5/5) and the Sony SRS-XG300 (ranked lower, rated 3.1/5). See every Sony XB and ULT generation.
Same family: the Sony ULT Field 1 (smaller model, rated 3.1/5), the Sony ULT Field 7 (smaller model, rated 3.2/5), the Sony ULT Tower 10 (smaller model, rated 3.9/5), the Sony ULT Field 3 (smaller model, rated 3.4/5), 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: A tough 3.3kg portable with IP67 protection, LDAC/AAC support, aux input, a 10-band app EQ, Party Connect, USB-C power-bank output and a claimed 25-hour battery. Reviews find it energetic and dynamic with substantial bass, enough volume for a yard, and two ULT modes that let bass-focused listeners choose a deeper or punchier presentation.
Cons: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth. Deep bass is less authoritative than the enclosure suggests, and the loud confirmation tone when pressing the ULT button is an unnecessary annoyance. Use the app EQ and audition it before buying for detail-focused music.
Full Sony ULT Field 5 review and specifications →
| Released | Apr 2025 (1 year ago) |
|---|---|
| Amplifier Power | 27W |
| App | Yes |
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| 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 |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| Weight | 7.3 lbs (3.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Sony ULT Field 5 vs Anker SoundCore Boom 2 - listening test More from Oluv’Sone →
- Dominik Reviews: Sony ULT Field 5 vs JBL Xtreme 4 - Outdoor Sound Test - Sony shines or not? More from Dominik Reviews →
- Mateusz Cholewa: SONY ULT Field 5 vs BOGASING S8 PRO MAX More from Mateusz Cholewa →
- Mateusz Cholewa: MARSHALL Kilburn 3 vs SONY ULT Field 5
- 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
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W-King D8: $69.99 Amazon $69.99 eBay
Pros: At 2.43 kg, W-King D8 combines 2x 70mm woofers + 2x 31mm tweeters + passive radiators with Bluetooth and aux. Claimed 24 hours (manufacturer specified) battery life, ipx7 protection, up to 101db and stereo playback make its feature set practical for its intended room or portable use. Measured bass extension of 49Hz (-10dB).
Cons: Bass is limited by its 49Hz specification. There is no companion app. No EQ adjustment.
Full W-King D8 review and specifications →
| Released | Jan 2020 (6 years ago) |
|---|---|
| Amplifier Power | 90W max / 50W RMS |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 49Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6” x 4.8” x 4.7” (320 x 121.9 x 119.4 mm) |
| Drivers | 2x 70mm woofers + 2x 31mm tweeters + passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 5.4 lbs (2.43 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: W King D8 vs W-King D9 - budget boombox battle! More from alanrossreviews →
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