Short answer: the Sony ULT Field 3 if sound quality matters most, the Treblab HD77 if price matters most. The Sony ULT Field 3 ranks #71 of 179 medium speakers, rated 3.4/5, at $208. The Treblab HD77 ranks #100, rated 3.1/5, at $69.97, $138.03 cheaper.
The case for the Sony ULT Field 3: A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port. It has an adjustable EQ, which the Treblab HD77 lacks. It plays in stereo from a single unit, unlike the Treblab HD77. The catch: Sounds a bit hollow, a bit boosted in the treble.
The Treblab HD77 is the lighter option. An affordable speaker with an aux input, long battery life, a speakerphone mic and pairing with a second unit. At 1.4 lbs (637 g) it weighs much less than the Sony ULT Field 3 at 2.6 lbs (1.2 kg). It keeps a wired aux input, which the Sony ULT Field 3 lacks. The catch: Lacking quite a bit of bass compared to higher ranked speakers.
Buy the Sony ULT Field 3 if sound quality matters more than the price. Buy the Treblab HD77 if the price matters more than sound quality.
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Prices on this page were last checked November 11, 2026 at 3:26 AM 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 3 | Treblab HD77 | |
|---|---|---|
| Price | $208.00 | $69.97 |
| Ranked | #71 of 179 in Medium Size Portable Bluetooth Speakers | #100 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (additional codecs unverified) |
| Bluetooth Version | 5.2 | 5.0 |
| Built-in Microphone | Yes | Yes |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 7.4” x 3” x 3” (187 x 76 x 76 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 2x 48mm fullrange |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | Yes (USB-C, 5V/1.5A) | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No (front/rear drivers) |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 2.6 lbs (1.2 kg) | 1.4 lbs (637 g) |
| Amplifier Power | 27W | 25W RMS |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| Bass Extension (-10dB) | - | ~66Hz |
| Wi-Fi | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
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