Short answer: the Soundcore Boom 2 for bass, the Sony ULT Field 3 for battery and app control. The Boom 2 reaches 47Hz at -10dB from 80W of amplification with IPX7 at $99.99, though a single midrange driver makes only the tweeters stereo and low-volume bass notes can disappear. The Sony gives 24 hours, a 10-band EQ, Party Connect for up to 100 speakers and USB-C at $208, but its bass is very weak with ULT off and ULT disables the EQ.
Buy the Sony ULT Field 3 at $208 if you want a medium speaker. Buy the Soundcore Boom 2 at $99.99 if you want a large speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port.
A light, waterproof large speaker with deep bass for its size, a 24 hour battery and fun lighting.
Prices on this page were last checked November 2, 2026 at 11:36 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 3 | Soundcore Boom 2 | |
|---|---|---|
| Price | $208.00 | $99.99 |
| Ranked | #71 of 177 in Medium Size Portable Bluetooth Speakers | #10 of 117 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.2 | 5.3 |
| Built-in Microphone | Yes | No |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) | 11.7” x 7.3” x 4” (297 x 185 x 102 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 120mm x 90mm woofer, 2x 20mm tweeters |
| EQ | Yes (App + ULT button) | Yes |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | Yes (PartyCast 2.0 up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1.5A) | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 2.6 lbs (1.2 kg) | 3.7 lbs (1.68 kg) |
| Amplifier Power | 27W | 80W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | No |
| Bass Extension (-10dB) | - | 47Hz |
| Bluetooth Latency | - | 125ms |
| Maximum SPL | - | 105dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | No |
| Frequency Response | - | 45Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
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