Short answer: the Sony ULT Field 1, if you are buying new. The Xiaomi Mi Portable ranks higher than it (#75 vs #97 of 164 medium speakers, 3.4/5 vs 3.1/5) but is discontinued, so only consider it used; the Sony ULT Field 1 is still sold new at $138.
The Xiaomi Mi Portable is the lighter choice. Good battery life for a 16W speaker: around 12 hours at moderate volume. At 0.8 lbs (373 g) it weighs much less than the Sony ULT Field 1 at 1.4 lbs (650 g). It keeps a wired aux input, which the Sony ULT Field 1 lacks. It plays in stereo from a single unit, unlike the Sony ULT Field 1. Watch for: A bit of a sharp treble.
What the Sony ULT Field 1 does well: IP67 rated, survives drops and 1m submersion. It supports AAC Bluetooth, which the Xiaomi Mi Portable lacks. The tradeoff: Upper midrange peak, rolled off treble.
Buy the Sony ULT Field 1 new; the Xiaomi Mi Portable is no longer sold new, so it only makes sense as a used find.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Xiaomi Mi Portable | Sony ULT Field 1 | |
|---|---|---|
| Price | $55 Discontinued | $138.00 |
| Ranked | #75 of 164 in Medium Size Portable Bluetooth Speakers | #97 of 164 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 13 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Weight | 0.8 lbs (373 g) | 1.4 lbs (650 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 16W | - |
| Aux Input | Yes (3.5mm) | No |
| Bluetooth Codecs | SBC | AAC, SBC |
| Built-in Microphone | Yes | Yes |
| Power Input | USB-C (5V/1A) | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Drivers | 2x 57mm full-range drivers + 2x passive radiators | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| EQ | Yes | Yes |
| App | No | Yes |
| Party Mode | - | Yes (Party Connect up to 100 speakers) |
| Power Bank | - | No |
| Strap | - | Yes (detachable strap) |
Related Speaker Comparisons
More worthwhile head-to-heads for Xiaomi Mi Portable:
- Soundcore Motion 300 vs Xiaomi Mi Portable
- Minirig 4 vs Xiaomi Mi Portable
- B&O Beosound A1 2nd gen vs Xiaomi Mi Portable
- JBL Charge 6 vs Xiaomi Mi Portable
- JBL Flip 6 vs Xiaomi Mi Portable
Prices on this page were last checked October 4, 2026 at 9:58 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.
The Two Speakers In Full
Xiaomi Mi Portable: $55 Discontinued Amazon eBay
Pros: Good battery life for a 16W speaker: around 12 hours at moderate volume. USB-C charging, stereo pairing support.
Cons: A bit of a sharp treble. Discontinued.
Full Xiaomi Mi Portable review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | No |
| Aux Input | Yes (3.5mm) |
| Battery Life | 13 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) |
| Drivers | 2x 57mm full-range drivers + 2x passive radiators |
| EQ | Yes |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C (5V/1A) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 0.8 lbs (373 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Xiaomi Mi Portable vs Sony ULT Field 3
- Xiaomi Mi Portable vs Sony XB33
- Xiaomi Mi Portable vs Bose Soundlink Mini
- Xiaomi Mi Portable vs Bose Soundlink Mini 2
- Xiaomi Mi Portable vs JBL Flip 5
- Xiaomi Mi Portable vs JBL Flip Essential 2
- Xiaomi Mi Portable vs Soundcore 3
- Xiaomi Mi Portable vs JBL Flip 4
- See all 39 comparisons
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).
Larger models: the Sony ULT Field 7 (rated 3.2/5) and the Sony ULT Tower 10 (rated 3.9/5).
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
- Sony ULT Field 1 vs JBL Grip
- Sony ULT Field 1 vs Treblab HD77
- Sony ULT Field 1 vs Tribit Xsound Go
- Sony ULT Field 1 vs Tronsmart Mirtune S100
- Sony ULT Field 1 vs KEF Muo gen2
- Sony ULT Field 1 vs Tronsmart Mirtune C3
- Sony ULT Field 1 vs Tribit Xsound Surf
- Sony ULT Field 1 vs Sonos Roam
- See all 140 comparisons