Short answer: the Tronsmart T8. It ranks #54 of 182 medium speakers by sound quality, rated 3.6/5, at $49.99; the Sony ULT Field 1 ranks #99, rated 3.1/5, and costs $138, so there is not much of a tradeoff to weigh.
The Tronsmart T8 is the better-sounding, longer-running option. An affordable waterproof speaker with upward firing drivers that spread sound around, plus lights, app EQ, an aux input and stereo pairing. It is rated for 18 hours of battery against 12 for the Sony ULT Field 1. It keeps a wired aux input, which the Sony ULT Field 1 lacks. The catch: Against the Xiaomi Sound Outdoor, listeners in Mateusz Cholewa’s comparison found the T8 harsh and tiring, and Techder Audios’ test showed the Xiaomi Sound Party with deeper, heavier bass.
The case for the Sony ULT Field 1: A tough, waterproof small speaker that survives drops, with long real world battery life and stereo pairing. The tradeoff: Upper midrange peak, rolled off treble.
Buy the Tronsmart T8. It is rated higher for sound quality than the Sony ULT Field 1 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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
| Tronsmart T8 | Sony ULT Field 1 | |
|---|---|---|
| Price | $49.99 | $138.00 |
| Ranked | #54 of 182 in Medium Size Portable Bluetooth Speakers | #99 of 182 in Medium Size Portable Bluetooth Speakers |
| Stereo | Partially | No |
| Amplifier Power | 40W | - |
| App | Yes (Tronsmart) | Yes |
| Aux Input | Yes | No |
| Battery Life | 18 hours at 50% volume, lights off (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Charging Time | 4.5 hours | - |
| Dimensions | 8.6”H x 3.2”W x 3.2”D (218 x 82 x 82 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 2x upward firing full-range drivers + 1x woofer + 2x passive radiators | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes (app) | Yes |
| Frequency Response | 56Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX7 | IP67 |
| Lights | Yes | - |
| MicroSD Playback | Yes | - |
| Omnidirectional | Pointing up | No |
| Power Input | USB-C | USB-C |
| Strap | Yes (lanyard) | Yes (detachable strap) |
| TWS | Yes | Yes |
| Weight | 1.8 lbs (0.80 kg) | 1.4 lbs (650 g) |
| Built-in Microphone | - | Yes |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | No |
| Bluetooth Codecs | - | AAC, SBC |
| Digital Aux Input | - | No |
Where the Ratings Come From
- Tronsmart T8: reviews by Mateusz Cholewa, Techder Audios and Jagist.
- Sony ULT Field 1: reviews by Techder Audios, Jay’s Straight Up Reviews & More and Storytripper HD.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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