Short answer: the Soundcore Motion X600, with one caveat. It ranks #59 of 120 large speakers against #19 for the Sony ULT Field 5, and it costs $188.01 less. The catch is that its ranking leans on a firmware update and an EQ tweak most owners have to seek out.
The Motion X600’s sound quality is a moving target, in a good way. Our notes say firmware 4.2.9 marked a big improvement over previous releases, and recommend a Patreon EQ from Oluv for the best result. Without that EQ, the stock tuning is wavy, with a dip in the upper bass around 120Hz and treble that runs a little hot, and our notes estimate it would rank closer to #20 in its class without the correction. Even EQed, the bass isn’t very deep and the sound stays a little unnatural.
The Sony ULT Field 5 doesn’t have a comparable EQ story, it’s just a middling-sounding speaker. Our notes describe its bass as not as deep as others in its category and call the sound quality overall just okay. Where it does lead is durability and battery: IP67 dust and water resistance against IPX7 for the Motion X600, and 25 hours of battery life against 12 hours for the Motion X600.
The Sony also has the more capable app and codec support: a 10-band EQ plus a dedicated ULT bass button, and AAC codec support where the Motion X600 is LDAC and SBC only. The Motion X600 counters with more raw output on paper, 50W against 27W, and an upward-firing driver for a spatial audio mode.
Buy the Soundcore Motion X600 if you’re willing to update its firmware and consider a community EQ preset for meaningfully better sound at a lower price.
Buy the Sony ULT Field 5 if you want stronger water resistance, longer battery life, and better codec support, and don’t mind accepting a speaker our notes call just okay for sound quality out of the box.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Sony ULT Field 5 | Soundcore Motion X600 | |
|---|---|---|
| Price | $348.00 | $159.99 |
| Ranked | #59 of 120 in Large Size Portable Bluetooth Speakers | #19 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Life | 25 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | 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) | 11.8” x 4.8” x 3.2” (300 x 121 x 81 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 2x 60mm woofers, 2x 27mm tweeters, 1x 50mm upward-firing driver |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (PartyCast up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-C) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 kg) | 5.2 lbs (2.35 kg) |
| Amplifier Power | 27W | 50W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | No |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 52Hz |
| Bluetooth Latency | - | 83ms |
| Maximum SPL | - | 104dB (measured by Alan Ross Reviews) |
| Frequency Response | - | 50Hz - 40kHz (Manufacturer specified) |
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