Short answer: the Sony ULT Field 1 on measured sound quality, the Zealot S61 on price. The Sony ULT Field 1 ranks #76 of 136 medium speakers at $98. The Zealot S61 ranks #134 at $20, $78 cheaper.
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
What the Zealot S61 offers: 20W output, IPX7 waterproof, exceptional 40-hour battery life, Bluetooth 5.2, TWS stereo pairing, compact 665g design, single full-range driver, built-in microphone, AUX input, USB-C charging Watch for: Sounds like a soup can, no bass at all. Weird frequency response all over.
Buy the Sony ULT Field 1 when sound quality outweighs the price for you, and the Zealot S61 when the price outweighs sound quality instead.
If sound quality matters at all to you, skip the Zealot S61. It ranks near the bottom of the 136 medium speakers, so look higher up the list instead.
If battery life is a priority, the Zealot S61 is rated for 40 hours versus 12 hours for the Sony ULT Field 1.
Specifications Side By Side
| Sony ULT Field 1 | Zealot S61 | |
|---|---|---|
| Price | $98.00 | $20 |
| Ranked | #76 of 136 in Medium Size Portable Bluetooth Speakers | #134 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Aux Input | No | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Built in Microphone | Yes | Yes |
| EQ | Yes | - |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect up to 100 speakers) | - |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | - |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.4 lbs / 650 g | 1.5 lbs / 665 g |
| Bluetooth Codecs | AAC, SBC | - |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 8.1" x 3" x 3" (206 x 77 x 76 mm) | 4.1" x 4.1" x 6.7" (103 x 103 x 170 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator | 66mm full-range |
| Digital Aux Input | No | No |
| Output Power | - | 20W |
Related Speaker Comparisons
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- JBL Flip 5 vs Altec Lansing Lifejacket 2/ Lifejacket 3
- JBL Grip vs Tribit Xsound Surf
- JBL Grip vs Zealot S61
- Sony XB23 vs Zealot S61
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
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
Zealot S61: $20 Amazon Aliexpress eBay
Pros: 20W output, IPX7 waterproof, exceptional 40-hour battery life, Bluetooth 5.2, TWS stereo pairing, compact 665g design, single full-range driver, built-in microphone, AUX input, USB-C charging
Cons: Sounds like a soup can, no bass at all. Weird frequency response all over.
Full Zealot S61 review and specifications →
| Aux Input | Yes |
|---|---|
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.1" x 4.1" x 6.7" (103 x 103 x 170 mm) |
| Drivers | 66mm full-range |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Output Power | 20W |
| Power Bank | No |
| Power Input | USB-C |
| TWS | Yes |
| Weight | 1.5 lbs / 665 g |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons