Short answer: the Sony ULT Field 1 if sound quality matters most, the Tozo PA2 if price matters most. The Sony ULT Field 1 ranks #86 of 150 medium speakers, rated 3.1/5, at $138. The Tozo PA2 ranks #118, rated 2.5/5, at $39.99, $98.01 cheaper.
The case for the Sony ULT Field 1: IP67 rated, survives drops and 1m submersion. The tradeoff: Upper midrange peak, rolled off treble.
What the Tozo PA2 does well: IPX8 rated, rugged fabric-wrapped design. The tradeoff: Quite a bit of bass distortion thudding as you turn the volume up.
Buy the Sony ULT Field 1 if sound quality is the priority over the price, or the Tozo PA2 if the price is the priority over sound quality.
There is a real battery-life gap here: the Tozo PA2 is rated for 25 hours, the Sony ULT Field 1 only 12 hours.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Sony ULT Field 1 | Tozo PA2 | |
|---|---|---|
| Price | $138.00 | $39.99 |
| Ranked | #86 of 150 in Medium Size Portable Bluetooth Speakers | #118 of 150 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (TOZO App) |
| Aux Input | No | No |
| Battery Life | 12 hours (Manufacturer specified) | 25 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes (16 EQ modes via app) |
| IP Rating | IP67 | IPX8 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.4 lbs (650 g) | 1.2 lbs (540 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC, AAC |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) | 7.1” x 2.8” x 3” (180 x 70 x 76 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator | 2x 1.7-inch full-range drivers + 2x passive radiators (44x49mm each) |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | - |
| Amplifier Power | - | 16W |
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Prices on this page were last checked September 30, 2026 at 2:57 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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The Two Speakers In Full
Sony ULT Field 1: $138.00 Amazon eBay
Older models: the Sony XB23 (ranked higher, rated 3.3/5) and the Sony SRS-XB20 (ranked lower, rated 2.8/5).
Pros: IP67 rated, survives drops and 1m submersion. Real-world battery around 28+ hours with ULT (bass boost) mode off. Stereo-pairs with a second ULT Field 1.
Cons: Upper midrange peak, rolled off treble
Full Sony ULT Field 1 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| Weight | 1.4 lbs (650 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Tozo PA2: $39.99 Amazon eBay
Pros: IPX8 rated, rugged fabric-wrapped design. App offers 16 EQ modes and TWS dual-pairing with a second PA2.
Cons: Quite a bit of bass distortion thudding as you turn the volume up. Bass not that deep. The Tozo PA1 totally outclasses it.
Full Tozo PA2 review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | Yes (TOZO App) |
| Aux Input | No |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.1” x 2.8” x 3” (180 x 70 x 76 mm) |
| Drivers | 2x 1.7-inch full-range drivers + 2x passive radiators (44x49mm each) |
| EQ | Yes (16 EQ modes via app) |
| IP Rating | IPX8 |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.2 lbs (540 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons