Short answer: the JBL Flip 6 is the more neutral small-speaker choice, while Sony’s ULT Field 3 brings longer runtime and more app features. JBL ranks #13 of 179; Sony ranks #71 of 179.
Flip 6 is a compact 30W speaker with a clean, near-neutral balance and 98dB maximum output. It is mono and its claimed 12-hour battery is modest, but it does not need tonal correction to be enjoyable.
ULT Field 3 adds a 24-hour battery, 10-band EQ, Party Connect, LDAC, and USB-C phone charging. Its bass is weak with ULT off, it sounds hollow, and enabling ULT disables custom EQ, leaving its feature advantage clear but its sound tradeoff real.
Buy the JBL Flip 6 at $79.95 if natural sound and a smaller size matter most.
Buy the Sony ULT Field 3 at $208 if runtime, app EQ, and party linking are more important.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A small, rugged speaker with very neutral sound for its size, an excellent choice for most people.
A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port.
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Specifications Side By Side
| JBL Flip 6 | Sony ULT Field 3 | |
|---|---|---|
| Price | $79.95 | $208.00 |
| Ranked | #13 of 179 in Medium Size Portable Bluetooth Speakers | #71 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | No | Yes |
| EQ | Yes (3 band) | Yes (App + ULT button) |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 116ms | - |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | Yes (USB-C, 5V/1.5A) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.2 lbs (544 g) | 2.6 lbs (1.2 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.1 | 5.2 |
| Dimensions | 6.9” x 2.7” x 2.8” (176 x 68 x 72 mm) | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) |
| Drivers | 44mm x 80mm woofer, 16mm tweeter | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| Power Input | USB-C | USB-C |
| Amplifier Power | 30W | 27W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | Yes (detachable shoulder strap) |
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