These sit in different size classes, so this is not a straight ranking comparison. The Sony ULT Field 5 ranks #59 of 120 large speakers by sound quality at $348; the Sony ULT Field 1 ranks #99 of 179 medium speakers by sound quality at $138.
The Sony ULT Field 5 is the longer-running choice. A tough, waterproof party speaker with loud, bass focused output, an aux input, a power bank and a long battery. It is rated for 25 hours of battery against 12 for the Sony ULT Field 1. It supports LDAC Bluetooth, which the Sony ULT Field 1 lacks. It keeps a wired aux input, which the Sony ULT Field 1 lacks. The tradeoff: It prioritizes bass and loudness over fidelity: reviews find the upper mids and highs subdued, with limited stereo separation and soundstage depth.
The Sony ULT Field 1 is the lighter choice. A tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing. At 1.4 lbs (650 g) it weighs much less than the Sony ULT Field 5 at 7.3 lbs (3.3 kg). The tradeoff: Upper midrange peak, rolled off treble.
Buy the Sony ULT Field 5 at $348 if you want a large speaker. Buy the Sony ULT Field 1 at $138 if you want a medium speaker instead.
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 | Sony ULT Field 1 | |
|---|---|---|
| Price | $348.00 | $138.00 |
| Ranked | #59 of 120 in Large Size Portable Bluetooth Speakers | #99 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Battery Life | 25 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | AAC, 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) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm woofer | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes (App + ULT button) | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 kg) | 1.4 lbs (650 g) |
| Amplifier Power | 27W | - |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | Yes (detachable strap) |
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