Short answer: the Monster Bluetooth Speaker. It ranks #39 of 62 small speakers by sound quality, rated 3.0/5, at $19.99; the Sony SRS-XB100 ranks #43, rated 2.9/5, and costs $34.91, so there is not much of a tradeoff to weigh.
The XB100 is the longer-running, better-built mini. Testing found about 17 hours of real battery life, it is IP67 with a clip strap, and it supports AAC and stereo pairing. Its 46mm driver gives little bass, and it is a bit muddy.
The Monster Bluetooth Speaker is a basic travel speaker. At 0.4 lbs (185 g) it is lighter, it is IPX7, and it adds aux and microSD playback and a speakerphone. Its 36mm driver falls 10dB at about 95Hz, its mids are elevated and highs rolled off, and its battery is rated for only 6.5 hours.
Buy the Monster Bluetooth Speaker. It is rated higher for sound quality than the Sony SRS-XB100 and costs less, which makes it the one to get unless you need something the other one does better.
If battery life is a priority, the Sony SRS-XB100 is rated for 16 hours versus 6.5 hours for the Monster Bluetooth Speaker.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A pocketable waterproof speaker with a long real world battery, a clip for bags, and stereo pairing.
A very cheap, light waterproof travel speaker with USB-C charging, aux and microSD playback, and stereo pairing.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Sony SRS-XB100 | Monster Bluetooth Speaker | |
|---|---|---|
| Price | $34.91 | $19.99 |
| Ranked | #43 of 62 in Small Size Portable Bluetooth Speakers | #39 of 62 in Small Size Portable Bluetooth Speakers |
| App | No | No |
| Battery Life | 16 hours (Manufacturer specified) | 6.5 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | No | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | Pointing up |
| TWS | Yes | Yes |
| Weight | 0.6 lbs (274 g) | 0.4 lbs (185 g) |
| Aux Input | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Bluetooth Version | 5.3 | 5.4 |
| Drivers | 46mm | 1.4” (36mm) full-range driver |
| Dimensions | 3” x 3.7” (76 x 95 mm) (diameter x height) | Specifications vary by model |
| Charging Time | 4.5 hours | - |
| Amplifier Power | 2.5W | 5W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | Yes (carabiner hook, suction cup) |
| Bass Extension (-10dB) | - | 95Hz |
| MicroSD Playback | - | Yes |
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