Short answer: the Boom 2, and it’s much cheaper too. It ranks #10 of 120 large speakers at $99.99; the ULT Field 5 ranks #59 at $348, $248.01 more.
Our own cons entry for the ULT Field 5 doesn’t oversell it. Bass not as deep as others in the category, sound quality that’s just okay overall, and a ULT button that makes a really loud tone when pressed. It does offer IP67 rating, a 25-hour battery, and a 10-band app EQ.
The Boom 2 needs a corrected EQ to hit its ranked potential, moving from around #24 on stock tuning to its actual #10 placement once Oluv’s or Alan Ross’s EQ is applied, with a single midrange driver as its structural limitation.
Buy the Boom 2 for the far better value once EQ’d. Buy the ULT Field 5 if Sony’s feature set specifically matters to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Sony ULT Field 5 | Soundcore Boom 2 | |
|---|---|---|
| Price | $348.00 | $99.99 |
| Ranked | #59 of 120 in Large Size Portable Bluetooth Speakers | #10 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Battery Life | 25 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC |
| Bluetooth Version | 5.3 | 5.3 |
| Built-in Microphone | Yes | No |
| Dimensions | 12.6” x 5.7” x 4.9” (320 x 144 x 125 mm) | 11.7” x 7.3” x 4” (297 x 185 x 102 mm) |
| Drivers | 2x 46mm tweeters + 1x 79mm x 107mm 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) | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Partially (1 woofer) |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs (3.3 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 |
Watch Them Compared
Videos and reviews that test both speakers side by side.
Related Speaker Comparisons
How Soundcore Boom 2 compares with other leading options: