Short answer: the Sony ULT Field 1, if you are buying new. The Soundcore Boost “upgraded” 2021 ranks higher than it (#5 vs #100 of 175 medium speakers, 4.4/5 vs 3.1/5) but is discontinued, so only consider it used; the Sony ULT Field 1 is still sold new at $138.
The Soundcore Boost “upgraded” 2021 is the better-sounding option. A very neutral good sounding inexpensive small speaker with quite deep bass for the size. It plays in stereo from a single unit, unlike the Sony ULT Field 1. The tradeoff: Slight DSP tuning issue which makes bass get lighter at times at very low volumes, examples in oluv’s video.
The case for the Sony ULT Field 1: IP67 rated, survives drops and 1m submersion. It supports AAC Bluetooth, which the Soundcore Boost “upgraded” 2021 lacks. It links with other speakers (Party Connect up to 100 speakers), which the Soundcore Boost “upgraded” 2021 cannot. The tradeoff: Upper midrange peak, rolled off treble.
Buy the Sony ULT Field 1, since the Soundcore Boost “upgraded” 2021 is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Soundcore Boost “upgraded” 2021 | Sony ULT Field 1 | |
|---|---|---|
| Price | $60 Discontinued | $138.00 |
| Ranked | #5 of 175 in Medium Size Portable Bluetooth Speakers | #100 of 175 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | AAC, SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (9 band) | Yes |
| IP Rating | IPX7 | IP67 |
| Bluetooth Latency | 150ms | - |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (590 g) | 1.4 lbs (650 g) |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 8” x 2.8” x 2.7” (204 x 72 x 69 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 1.75” (44mm) x 2 active drivers and one passive radiator | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Amplifier Power | 20W (10W × 2) | - |
| Digital Aux Input | No | No |
| Strap | - | Yes (detachable strap) |
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Prices on this page were last checked October 12, 2026 at 4:13 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
Soundcore Boost “upgraded” 2021: $60 Discontinued eBay
Older model: the Soundcore Boost “original model” pre-2021 (ranked lower, rated 4.2/5). See every Soundcore Boost generation.
Pros: A very neutral good sounding inexpensive small speaker with quite deep bass for the size. This upgraded version has a usb-c port while the old one has micro usb. Measured bass extension of 56Hz (-10dB).
Cons: Slight DSP tuning issue which makes bass get lighter at times at very low volumes, examples in oluv’s video. Discontinued and no longer sold new.
Full Soundcore Boost “upgraded” 2021 review and specifications →
| Released | Jul 2021 (5 years ago) |
|---|---|
| Amplifier Power | 20W (10W × 2) |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 150ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8” x 2.8” x 2.7” (204 x 72 x 69 mm) |
| Drivers | 1.75” (44mm) x 2 active drivers and one passive radiator |
| EQ | Yes (9 band) |
| IP Rating | IPX7 |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A, 5V/1A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.3 lbs (590 g) |
- Links
- Reviews, Comparisons and Sound Samples
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Sony ULT Field 1: $138.00 Amazon $138.00 eBay
Older models: the Sony XB23 (ranked higher, rated 3.3/5), the Sony SRS-XB20 (ranked lower, rated 2.8/5), the Sony SRS-XB21 (ranked lower, rated 2.7/5) and the Sony SRS-XE200 (ranked lower, rated 2.5/5). See every Sony XB and ULT generation.
Same family: the Sony ULT Field 7 (larger model, rated 3.2/5), the Sony ULT Tower 10 (larger model, rated 3.9/5), the Sony ULT Field 3 (larger model, ranked higher, rated 3.4/5), the Sony ULT Field 5 (larger model, rated 3.5/5), the Sony ULT Tower 5 (larger model, rated 4.5/5), the Sony ULT Tower 7 (larger model, rated 4.7/5), the Sony ULT Tower 9 (larger model, rated 4.2/5) and the Sony ULT Tower Max (larger model, rated 4.8/5).
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 →
| Released | Apr 2024 (2 years ago) |
|---|---|
| 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
- Techder Audios: Sony ULT Field 1 VS Teufel Rockster Go 2 “CLOSE CALL?” More from techderaudios →
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