Short answer: the JBL Flip 4. It ranks #63 of 136 medium speakers by sound quality at $70; the Sony ULT Field 1 ranks #76 and costs $98, so there is little reason to consider the other one.
What the JBL Flip 4 offers: Less bass than a Flip 5. Peaky lower treble. Watch for: Battery failures are common.
What the Sony ULT Field 1 offers: 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. Watch for: Upper midrange peak, rolled off treble
Buy the JBL Flip 4. It ranks higher for sound quality than the Sony ULT Field 1 and costs less, so there is no real case for the other one.
Specifications Side By Side
| JBL Flip 4 | Sony ULT Field 1 | |
|---|---|---|
| Price | $70 Discontinued | $98.00 |
| Ranked | #63 of 136 in Medium Size Portable Bluetooth Speakers | #76 of 136 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 66Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth Latency | 300ms | - |
| Party Mode | Yes (Connect+ up to 100 speakers) | Yes (Party Connect up to 100 speakers) |
| Power Input | Micro USB | USB-C |
| TWS | No | Yes |
| Weight | 1.1 lbs / 510 g | 1.4 lbs / 650 g |
| Bluetooth Version | 4.2 | 5.3 |
| Drivers | 2x 40mm fullrange | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Dimensions | 6.9" x 2.8" x 2.6" (175 x 70 x 65 mm) | 8.1" x 3" x 3" (206 x 77 x 76 mm) |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) | - |
| Output Power | 16W RMS | - |
| IP Rating | IPX7 | IP67 |
| Discontinued | Yes | - |
| Max Volume | 92dB | - |
| Digital Aux Input | No | No |
| Omnidirectional | No | No |
| App | - | Yes |
| Built in Microphone | - | Yes |
| EQ | - | Yes |
| Power Bank | - | No |
| Stereo | - | No |
| Bluetooth Codecs | - | AAC, SBC |
Related Speaker Comparisons
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- Sony XB23 vs Tribit Stormbox
- JBL Grip vs Tribit Stormbox
- W-King D320 vs JBL Grip
- Sony ULT Field 1 vs Tribit Stormbox 2
- W-King D320 vs Sony ULT Field 1
Prices on this page were last checked August 27, 2026 at 10:09 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
JBL Flip 4: $70 Discontinued Amazon eBay
Pros: Less bass than a Flip 5. Peaky lower treble.
Cons: Battery failures are common. Discontinued.
Full JBL Flip 4 review and specifications →
| Aux Input | Yes |
|---|---|
| Bass Extension (-10dB) | 66Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Latency | 300ms |
| Bluetooth Version | 4.2 |
| Digital Aux Input | No |
| Dimensions | 6.9" x 2.8" x 2.6" (175 x 70 x 65 mm) |
| Discontinued | Yes |
| Drivers | 2x 40mm fullrange |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Max Volume | 92dB |
| Omnidirectional | No |
| Output Power | 16W RMS |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Input | Micro USB |
| TWS | No |
| Weight | 1.1 lbs / 510 g |
- Links
- Reviews, Comparisons and Sound Samples
- DLX Willington: JBL Flip 5 vs Flip 4 :Sound Battle: Almost to the size of the JBL Charge 3? More from DLXWillington →
- GYMCADDY: Best $100 Speaker? JBL Flip 4 Vs Sony XB20 Vs UE WONDERBOOM Vs Altec Mini Lifejacket 2 More from GYMCADDY →
- GYMCADDY: Best $100 Speaker? JBL Flip 4 Vs Sony XB20 Vs UE WONDERBOOM Vs Altec Mini Lifejacket 2
- Reddit Search for JBL Flip 4 Review
- Head-to-Head Comparisons
Sony ULT Field 1: $98.00 Amazon eBay
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 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 |
| TWS | Yes |
| Weight | 1.4 lbs / 650 g |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons