Short answer: it depends on the setup, with the Sony ULT Field 3 as a portable and the Yamaha True X Speaker 1A as a surround option. The Yamaha doubles as a wireless surround for True X soundbars or a standalone in Solo mode at $150, but its bass is not very deep and an upper-mids peak makes voices sibilant. The Sony is IP67 rated and dustproof and water resistant at $138, though it sounds a bit hollow with boosted treble.
What the Sony ULT Field 3 gets right: IP67 rated, dustproof and water resistant. The tradeoff: Sounds a bit hollow, a bit boosted in the treble.
On the Yamaha True X Speaker 1A side: Doubles as a wireless surround speaker for Yamaha True X soundbars, or a standalone speaker via ‘Solo’ mode. The tradeoff: Not very deep bass, upper mids peak that makes voices sibilant.
Buy the Sony ULT Field 3. It ranks higher for sound quality than the Yamaha True X Speaker 1A and costs less, so the other one has nothing left to offer.
Battery life favors the Sony ULT Field 3: rated for 24 hours against 12 hours for the Yamaha True X Speaker 1A.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Field 3 | Yamaha True X Speaker 1A | |
|---|---|---|
| Price | $138.00 | $150 |
| Ranked | #60 of 142 in Medium Size Portable Bluetooth Speakers | #98 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.2 | 5.0 |
| Built-in Microphone | Yes | No |
| Dimensions | 10.1" x 4.4" x 3.1" (256 x 113 x 79 mm) | 4.1" x 3.5" x 3.5" (105 x 90 x 90 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer | 1x 55mm (2.2") full-range driver + 2x passive radiators |
| EQ | Yes (App + ULT button) | No |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | Yes (USB-C, 5V/1.5A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 2.6 lbs (1.2 kg) | 1.1 lbs (500 g) |
| Amplifier Power | 27W | 10W |
| Digital Aux Input | No | No |
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Prices on this page were last checked September 22, 2026 at 5:11 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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The Two Speakers In Full
Sony ULT Field 3: $138.00 Amazon eBay
Pros: IP67 rated, dustproof and water resistant. 24 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone.
Cons: Sounds a bit hollow, a bit boosted in the treble. Custom EQ and the ULT bass-boost button can’t be used together - turning on ULT disables the EQ. Bass is very weak with ULT off. Lost to the JBL Charge 6 in a side-by-side comparison despite being the larger speaker.
Full Sony ULT Field 3 review and specifications →
| Amplifier Power | 27W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.1" x 4.4" x 3.1" (256 x 113 x 79 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1.5A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.6 lbs (1.2 kg) |
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Yamaha True X Speaker 1A: $150 Amazon eBay
Pros: Doubles as a wireless surround speaker for Yamaha True X soundbars, or a standalone speaker via ‘Solo’ mode. IP67 rated. Clear Voice technology boosts dialogue clarity.
Cons: Not very deep bass, upper mids peak that makes voices sibilant
Full Yamaha True X Speaker 1A review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.0 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1" x 3.5" x 3.5" (105 x 90 x 90 mm) |
| Drivers | 1x 55mm (2.2") full-range driver + 2x passive radiators |
| EQ | No |
| IP Rating | IP67 |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 1.1 lbs (500 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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