Short answer: both are discontinued, so this only matters if you are buying used, though neither ranks well in its class. Used, the Sony SRS-XB20 is the better pick: it ranks #120 of 175 medium speakers by sound quality (rated 2.8/5), against #172 (rated 2.0/5) for the Zealot S61. If you want one new, the Sony ULT Field 1 replaces the Sony SRS-XB20 and is rated 3.1/5 at $138. Both are rated below 3.0/5 among the 175 medium speakers, and the EarFun Uboom L, ranked #2 at $49.79, is a better place to start if sound quality matters.
The Sony SRS-XB20 is the better-sounding option. It plays in stereo from a single unit, unlike the Zealot S61. The catch: Sounds thin at higher volumes.
The Zealot S61 is the longer-running, tougher option. 20W output, IPX7 waterproof, exceptional 40-hour battery life, Bluetooth 5.2, TWS stereo pairing, compact 1.5 lbs (665 g) design, single full-range driver, built-in microphone, AUX input, USB-C charging. It is rated for 40 hours of battery against 12 for the Sony SRS-XB20. It is rated IPX7 against IPX5 for the Sony SRS-XB20. It charges over USB-C rather than Micro USB. The catch: Sounds like a soup can, no bass at all.
Buy the Sony SRS-XB20 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, buy the Sony ULT Field 1, which replaces the Sony SRS-XB20.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Sony SRS-XB20 | Zealot S61 | |
|---|---|---|
| Price | $129 Discontinued | $20 Discontinued |
| Ranked | #120 of 175 in Medium Size Portable Bluetooth Speakers | #172 of 175 in Medium Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Party Mode | Yes (Partychain up to 100 speakers) | - |
| Weight | 1.3 lbs (590 g) | 1.5 lbs (665 g) |
| IP Rating | IPX5 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | 5.2 |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC (inferred; additional codecs unverified) |
| Dimensions | 7.8” x 2.7” x 2.7” (198 x 68 x 69 mm) | 4.1” x 4.1” x 6.7” (103 x 103 x 170 mm) |
| TWS | Yes | Yes |
| Stereo | Yes | No (single full-range driver) |
| Omnidirectional | No | No |
| App | Yes (SongPal) | No |
| EQ | No | No |
| Built-in Microphone | Yes | Yes |
| Power Input | Micro USB | USB-C |
| Power Bank | No | No |
| Amplifier Power | 20W | 20W |
| Drivers | 2x 42mm full-range drivers + 2x passive radiators | 66mm full-range |
| Digital Aux Input | No | No |
Related Speaker Comparisons
How Sony SRS-XB20 compares with other leading options:
- Soundcore Motion 300 vs Sony SRS-XB20
- Soundcore Motion+ vs Sony SRS-XB20
- Soundcore Boost “upgraded” 2021 vs Sony SRS-XB20
- JBL Charge 6 vs Sony SRS-XB20
- JBL Flip 6 vs Sony SRS-XB20
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
Sony SRS-XB20: $129 Discontinued eBay
Newer model: the Sony ULT Field 1, ranked higher, rated 3.1/5, released Apr 2024. See every Sony XB and ULT generation.
Pros: Sony SRS-XB20 uses 2x 42mm full-range drivers + 2x passive radiators. Its 590 g, claimed 12 hours (Manufacturer specified) battery life, IPX5 protection, aux input and stereo playback make it a practical option for its intended room or portable use.
Cons: No EQ adjustment. Sounds thin at higher volumes. Discontinued.
Full Sony SRS-XB20 review and specifications →
| Released | Mar 2017 (9 years ago) |
|---|---|
| Amplifier Power | 20W |
| App | Yes (SongPal) |
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.8” x 2.7” x 2.7” (198 x 68 x 69 mm) |
| Drivers | 2x 42mm full-range drivers + 2x passive radiators |
| EQ | No |
| IP Rating | IPX5 |
| Omnidirectional | No |
| Party Mode | Yes (Partychain up to 100 speakers) |
| Power Bank | No |
| Power Input | Micro USB |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.3 lbs (590 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony SRS-XB20 vs Yamaha True X Speaker 1A
- Sony SRS-XB20 vs Tribit Stormbox
- Sony SRS-XB20 vs Sony SRS-XE300
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- Sony SRS-XB20 vs Ultimate Ears Boom 3
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Zealot S61: $20 Discontinued 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. Discontinued and no longer sold new.
Full Zealot S61 review and specifications →
| Released | Feb 2022 (4 years ago) |
|---|---|
| Amplifier Power | 20W |
| App | No |
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| 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 |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No (single full-range driver) |
| TWS | Yes |
| Weight | 1.5 lbs (665 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons